diff --git a/docs/abci-cli.md b/docs/abci-cli.md index 246e8b1a2..4f9019fda 100644 --- a/docs/abci-cli.md +++ b/docs/abci-cli.md @@ -10,41 +10,47 @@ Make sure you [have Go installed](https://golang.org/doc/install). Next, install the `abci-cli` tool and example applications: - go get github.com/tendermint/tendermint +``` +go get github.com/tendermint/tendermint +``` to get vendored dependencies: - cd $GOPATH/src/github.com/tendermint/tendermint - make get_tools - make get_vendor_deps - make install_abci +``` +cd $GOPATH/src/github.com/tendermint/tendermint +make get_tools +make get_vendor_deps +make install_abci +``` Now run `abci-cli` to see the list of commands: - Usage: - abci-cli [command] - - Available Commands: - batch Run a batch of abci commands against an application - check_tx Validate a tx - commit Commit the application state and return the Merkle root hash - console Start an interactive abci console for multiple commands - counter ABCI demo example - deliver_tx Deliver a new tx to the application - kvstore ABCI demo example - echo Have the application echo a message - help Help about any command - info Get some info about the application - query Query the application state - set_option Set an options on the application - - Flags: - --abci string socket or grpc (default "socket") - --address string address of application socket (default "tcp://127.0.0.1:26658") - -h, --help help for abci-cli - -v, --verbose print the command and results as if it were a console session - - Use "abci-cli [command] --help" for more information about a command. +``` +Usage: + abci-cli [command] + +Available Commands: + batch Run a batch of abci commands against an application + check_tx Validate a tx + commit Commit the application state and return the Merkle root hash + console Start an interactive abci console for multiple commands + counter ABCI demo example + deliver_tx Deliver a new tx to the application + kvstore ABCI demo example + echo Have the application echo a message + help Help about any command + info Get some info about the application + query Query the application state + set_option Set an options on the application + +Flags: + --abci string socket or grpc (default "socket") + --address string address of application socket (default "tcp://127.0.0.1:26658") + -h, --help help for abci-cli + -v, --verbose print the command and results as if it were a console session + +Use "abci-cli [command] --help" for more information about a command. +``` ## KVStore - First Example @@ -63,59 +69,69 @@ Its code can be found [here](https://github.com/tendermint/tendermint/blob/develop/abci/cmd/abci-cli/abci-cli.go) and looks like: - func cmdKVStore(cmd *cobra.Command, args []string) error { - logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout)) - - // Create the application - in memory or persisted to disk - var app types.Application - if flagPersist == "" { - app = kvstore.NewKVStoreApplication() - } else { - app = kvstore.NewPersistentKVStoreApplication(flagPersist) - app.(*kvstore.PersistentKVStoreApplication).SetLogger(logger.With("module", "kvstore")) - } - - // Start the listener - srv, err := server.NewServer(flagAddrD, flagAbci, app) - if err != nil { - return err - } - srv.SetLogger(logger.With("module", "abci-server")) - if err := srv.Start(); err != nil { - return err - } - - // Wait forever - cmn.TrapSignal(func() { - // Cleanup - srv.Stop() - }) - return nil +``` +func cmdKVStore(cmd *cobra.Command, args []string) error { + logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout)) + + // Create the application - in memory or persisted to disk + var app types.Application + if flagPersist == "" { + app = kvstore.NewKVStoreApplication() + } else { + app = kvstore.NewPersistentKVStoreApplication(flagPersist) + app.(*kvstore.PersistentKVStoreApplication).SetLogger(logger.With("module", "kvstore")) } + // Start the listener + srv, err := server.NewServer(flagAddrD, flagAbci, app) + if err != nil { + return err + } + srv.SetLogger(logger.With("module", "abci-server")) + if err := srv.Start(); err != nil { + return err + } + + // Wait forever + cmn.TrapSignal(func() { + // Cleanup + srv.Stop() + }) + return nil +} +``` + Start by running: - abci-cli kvstore +``` +abci-cli kvstore +``` And in another terminal, run - abci-cli echo hello - abci-cli info +``` +abci-cli echo hello +abci-cli info +``` You'll see something like: - -> data: hello - -> data.hex: 68656C6C6F +``` +-> data: hello +-> data.hex: 68656C6C6F +``` and: - -> data: {"size":0} - -> data.hex: 7B2273697A65223A307D +``` +-> data: {"size":0} +-> data.hex: 7B2273697A65223A307D +``` An ABCI application must provide two things: -- a socket server -- a handler for ABCI messages +- a socket server +- a handler for ABCI messages When we run the `abci-cli` tool we open a new connection to the application's socket server, send the given ABCI message, and wait for a @@ -144,52 +160,54 @@ speaking ABCI messages to your application. Try running these commands: - > echo hello - -> code: OK - -> data: hello - -> data.hex: 0x68656C6C6F - - > info - -> code: OK - -> data: {"size":0} - -> data.hex: 0x7B2273697A65223A307D - - > commit - -> code: OK - -> data.hex: 0x0000000000000000 - - > deliver_tx "abc" - -> code: OK - - > info - -> code: OK - -> data: {"size":1} - -> data.hex: 0x7B2273697A65223A317D - - > commit - -> code: OK - -> data.hex: 0x0200000000000000 - - > query "abc" - -> code: OK - -> log: exists - -> height: 0 - -> value: abc - -> value.hex: 616263 - - > deliver_tx "def=xyz" - -> code: OK - - > commit - -> code: OK - -> data.hex: 0x0400000000000000 - - > query "def" - -> code: OK - -> log: exists - -> height: 0 - -> value: xyz - -> value.hex: 78797A +``` +> echo hello +-> code: OK +-> data: hello +-> data.hex: 0x68656C6C6F + +> info +-> code: OK +-> data: {"size":0} +-> data.hex: 0x7B2273697A65223A307D + +> commit +-> code: OK +-> data.hex: 0x0000000000000000 + +> deliver_tx "abc" +-> code: OK + +> info +-> code: OK +-> data: {"size":1} +-> data.hex: 0x7B2273697A65223A317D + +> commit +-> code: OK +-> data.hex: 0x0200000000000000 + +> query "abc" +-> code: OK +-> log: exists +-> height: 0 +-> value: abc +-> value.hex: 616263 + +> deliver_tx "def=xyz" +-> code: OK + +> commit +-> code: OK +-> data.hex: 0x0400000000000000 + +> query "def" +-> code: OK +-> log: exists +-> height: 0 +-> value: xyz +-> value.hex: 78797A +``` Note that if we do `deliver_tx "abc"` it will store `(abc, abc)`, but if we do `deliver_tx "abc=efg"` it will store `(abc, efg)`. @@ -206,29 +224,31 @@ Like the kvstore app, its code can be found [here](https://github.com/tendermint/tendermint/blob/master/abci/cmd/abci-cli/abci-cli.go) and looks like: - func cmdCounter(cmd *cobra.Command, args []string) error { - - app := counter.NewCounterApplication(flagSerial) - - logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout)) - - // Start the listener - srv, err := server.NewServer(flagAddrC, flagAbci, app) - if err != nil { - return err - } - srv.SetLogger(logger.With("module", "abci-server")) - if err := srv.Start(); err != nil { - return err - } - - // Wait forever - cmn.TrapSignal(func() { - // Cleanup - srv.Stop() - }) - return nil +``` +func cmdCounter(cmd *cobra.Command, args []string) error { + + app := counter.NewCounterApplication(flagSerial) + + logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout)) + + // Start the listener + srv, err := server.NewServer(flagAddrC, flagAbci, app) + if err != nil { + return err } + srv.SetLogger(logger.With("module", "abci-server")) + if err := srv.Start(); err != nil { + return err + } + + // Wait forever + cmn.TrapSignal(func() { + // Cleanup + srv.Stop() + }) + return nil +} +``` The counter app doesn't use a Merkle tree, it just counts how many times we've sent a transaction, asked for a hash, or committed the state. The @@ -256,38 +276,42 @@ whose integer is greater than the last committed one. Let's kill the console and the kvstore application, and start the counter app: - abci-cli counter +``` +abci-cli counter +``` In another window, start the `abci-cli console`: - > set_option serial on - -> code: OK - -> log: OK (SetOption doesn't return anything.) +``` +> set_option serial on +-> code: OK +-> log: OK (SetOption doesn't return anything.) - > check_tx 0x00 - -> code: OK +> check_tx 0x00 +-> code: OK - > check_tx 0xff - -> code: OK +> check_tx 0xff +-> code: OK - > deliver_tx 0x00 - -> code: OK +> deliver_tx 0x00 +-> code: OK - > check_tx 0x00 - -> code: BadNonce - -> log: Invalid nonce. Expected >= 1, got 0 +> check_tx 0x00 +-> code: BadNonce +-> log: Invalid nonce. Expected >= 1, got 0 - > deliver_tx 0x01 - -> code: OK +> deliver_tx 0x01 +-> code: OK - > deliver_tx 0x04 - -> code: BadNonce - -> log: Invalid nonce. Expected 2, got 4 +> deliver_tx 0x04 +-> code: BadNonce +-> log: Invalid nonce. Expected 2, got 4 - > info - -> code: OK - -> data: {"hashes":0,"txs":2} - -> data.hex: 0x7B22686173686573223A302C22747873223A327D +> info +-> code: OK +-> data: {"hashes":0,"txs":2} +-> data.hex: 0x7B22686173686573223A302C22747873223A327D +``` This is a very simple application, but between `counter` and `kvstore`, its easy to see how you can build out arbitrary application states on @@ -304,7 +328,9 @@ example directory](https://github.com/tendermint/tendermint/tree/develop/abci/ex To run the Node JS version, `cd` to `example/js` and run - node app.js +``` +node app.js +``` (you'll have to kill the other counter application process). In another window, run the console and those previous ABCI commands. You should get diff --git a/docs/abci-spec.md b/docs/abci-spec.md index de680a02e..ef274a4e8 100644 --- a/docs/abci-spec.md +++ b/docs/abci-spec.md @@ -36,9 +36,9 @@ Commit are included in the header of the next block. Tendermint opens three connections to the application to handle the different message types: -- `Consensus Connection - InitChain, BeginBlock, DeliverTx, EndBlock, Commit` -- `Mempool Connection - CheckTx` -- `Info Connection - Info, SetOption, Query` +- `Consensus Connection - InitChain, BeginBlock, DeliverTx, EndBlock, Commit` +- `Mempool Connection - CheckTx` +- `Info Connection - Info, SetOption, Query` The `Flush` message is used on every connection, and the `Echo` message is only used for debugging. @@ -54,272 +54,272 @@ See below for more details on the message types and how they are used. ### Echo -- **Request**: - - `Message (string)`: A string to echo back -- **Response**: - - `Message (string)`: The input string -- **Usage**: - - Echo a string to test an abci client/server implementation +- **Request**: + - `Message (string)`: A string to echo back +- **Response**: + - `Message (string)`: The input string +- **Usage**: + - Echo a string to test an abci client/server implementation ### Flush -- **Usage**: - - Signals that messages queued on the client should be flushed to - the server. It is called periodically by the client - implementation to ensure asynchronous requests are actually - sent, and is called immediately to make a synchronous request, - which returns when the Flush response comes back. +- **Usage**: + - Signals that messages queued on the client should be flushed to + the server. It is called periodically by the client + implementation to ensure asynchronous requests are actually + sent, and is called immediately to make a synchronous request, + which returns when the Flush response comes back. ### Info -- **Request**: - - `Version (string)`: The Tendermint version -- **Response**: - - `Data (string)`: Some arbitrary information - - `Version (Version)`: Version information - - `LastBlockHeight (int64)`: Latest block for which the app has - called Commit - - `LastBlockAppHash ([]byte)`: Latest result of Commit -- **Usage**: - - Return information about the application state. - - Used to sync Tendermint with the application during a handshake - that happens on startup. - - Tendermint expects `LastBlockAppHash` and `LastBlockHeight` to - be updated during `Commit`, ensuring that `Commit` is never - called twice for the same block height. +- **Request**: + - `Version (string)`: The Tendermint version +- **Response**: + - `Data (string)`: Some arbitrary information + - `Version (Version)`: Version information + - `LastBlockHeight (int64)`: Latest block for which the app has + called Commit + - `LastBlockAppHash ([]byte)`: Latest result of Commit +- **Usage**: + - Return information about the application state. + - Used to sync Tendermint with the application during a handshake + that happens on startup. + - Tendermint expects `LastBlockAppHash` and `LastBlockHeight` to + be updated during `Commit`, ensuring that `Commit` is never + called twice for the same block height. ### SetOption -- **Request**: - - `Key (string)`: Key to set - - `Value (string)`: Value to set for key -- **Response**: - - `Code (uint32)`: Response code - - `Log (string)`: The output of the application's logger. May - be non-deterministic. - - `Info (string)`: Additional information. May - be non-deterministic. -- **Usage**: - - Set non-consensus critical application specific options. - - e.g. Key="min-fee", Value="100fermion" could set the minimum fee - required for CheckTx (but not DeliverTx - that would be - consensus critical). +- **Request**: + - `Key (string)`: Key to set + - `Value (string)`: Value to set for key +- **Response**: + - `Code (uint32)`: Response code + - `Log (string)`: The output of the application's logger. May + be non-deterministic. + - `Info (string)`: Additional information. May + be non-deterministic. +- **Usage**: + - Set non-consensus critical application specific options. + - e.g. Key="min-fee", Value="100fermion" could set the minimum fee + required for CheckTx (but not DeliverTx - that would be + consensus critical). ### InitChain -- **Request**: - - `Validators ([]Validator)`: Initial genesis validators - - `AppStateBytes ([]byte)`: Serialized initial application state -- **Response**: - - `ConsensusParams (ConsensusParams)`: Initial - consensus-critical parameters. - - `Validators ([]Validator)`: Initial validator set. -- **Usage**: - - Called once upon genesis. +- **Request**: + - `Validators ([]Validator)`: Initial genesis validators + - `AppStateBytes ([]byte)`: Serialized initial application state +- **Response**: + - `ConsensusParams (ConsensusParams)`: Initial + consensus-critical parameters. + - `Validators ([]Validator)`: Initial validator set. +- **Usage**: + - Called once upon genesis. ### Query -- **Request**: - - `Data ([]byte)`: Raw query bytes. Can be used with or in lieu - of Path. - - `Path (string)`: Path of request, like an HTTP GET path. Can be - used with or in liue of Data. - - Apps MUST interpret '/store' as a query by key on the - underlying store. The key SHOULD be specified in the Data field. - - Apps SHOULD allow queries over specific types like - '/accounts/...' or '/votes/...' - - `Height (int64)`: The block height for which you want the query - (default=0 returns data for the latest committed block). Note - that this is the height of the block containing the - application's Merkle root hash, which represents the state as it - was after committing the block at Height-1 - - `Prove (bool)`: Return Merkle proof with response if possible -- **Response**: - - `Code (uint32)`: Response code. - - `Log (string)`: The output of the application's logger. May - be non-deterministic. - - `Info (string)`: Additional information. May - be non-deterministic. - - `Index (int64)`: The index of the key in the tree. - - `Key ([]byte)`: The key of the matching data. - - `Value ([]byte)`: The value of the matching data. - - `Proof ([]byte)`: Proof for the data, if requested. - - `Height (int64)`: The block height from which data was derived. - Note that this is the height of the block containing the - application's Merkle root hash, which represents the state as it - was after committing the block at Height-1 -- **Usage**: - - Query for data from the application at current or past height. - - Optionally return Merkle proof. +- **Request**: + - `Data ([]byte)`: Raw query bytes. Can be used with or in lieu + of Path. + - `Path (string)`: Path of request, like an HTTP GET path. Can be + used with or in liue of Data. + - Apps MUST interpret '/store' as a query by key on the + underlying store. The key SHOULD be specified in the Data field. + - Apps SHOULD allow queries over specific types like + '/accounts/...' or '/votes/...' + - `Height (int64)`: The block height for which you want the query + (default=0 returns data for the latest committed block). Note + that this is the height of the block containing the + application's Merkle root hash, which represents the state as it + was after committing the block at Height-1 + - `Prove (bool)`: Return Merkle proof with response if possible +- **Response**: + - `Code (uint32)`: Response code. + - `Log (string)`: The output of the application's logger. May + be non-deterministic. + - `Info (string)`: Additional information. May + be non-deterministic. + - `Index (int64)`: The index of the key in the tree. + - `Key ([]byte)`: The key of the matching data. + - `Value ([]byte)`: The value of the matching data. + - `Proof ([]byte)`: Proof for the data, if requested. + - `Height (int64)`: The block height from which data was derived. + Note that this is the height of the block containing the + application's Merkle root hash, which represents the state as it + was after committing the block at Height-1 +- **Usage**: + - Query for data from the application at current or past height. + - Optionally return Merkle proof. ### BeginBlock -- **Request**: - - `Hash ([]byte)`: The block's hash. This can be derived from the - block header. - - `Header (struct{})`: The block header - - `Validators ([]SigningValidator)`: List of validators in the current validator - set and whether or not they signed a vote in the LastCommit - - `ByzantineValidators ([]Evidence)`: List of evidence of - validators that acted maliciously -- **Response**: - - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing -- **Usage**: - - Signals the beginning of a new block. Called prior to - any DeliverTxs. - - The header is expected to at least contain the Height. - - The `Validators` and `ByzantineValidators` can be used to - determine rewards and punishments for the validators. +- **Request**: + - `Hash ([]byte)`: The block's hash. This can be derived from the + block header. + - `Header (struct{})`: The block header + - `Validators ([]SigningValidator)`: List of validators in the current validator + set and whether or not they signed a vote in the LastCommit + - `ByzantineValidators ([]Evidence)`: List of evidence of + validators that acted maliciously +- **Response**: + - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing +- **Usage**: + - Signals the beginning of a new block. Called prior to + any DeliverTxs. + - The header is expected to at least contain the Height. + - The `Validators` and `ByzantineValidators` can be used to + determine rewards and punishments for the validators. ### CheckTx -- **Request**: - - `Tx ([]byte)`: The request transaction bytes -- **Response**: - - `Code (uint32)`: Response code - - `Data ([]byte)`: Result bytes, if any. - - `Log (string)`: The output of the application's logger. May - be non-deterministic. - - `Info (string)`: Additional information. May - be non-deterministic. - - `GasWanted (int64)`: Amount of gas request for transaction. - - `GasUsed (int64)`: Amount of gas consumed by transaction. - - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing - transactions (eg. by account). - - `Fee (cmn.KI64Pair)`: Fee paid for the transaction. -- **Usage**: Validate a mempool transaction, prior to broadcasting - or proposing. CheckTx should perform stateful but light-weight - checks of the validity of the transaction (like checking signatures - and account balances), but need not execute in full (like running a - smart contract). - - Tendermint runs CheckTx and DeliverTx concurrently with eachother, - though on distinct ABCI connections - the mempool connection and the - consensus connection, respectively. - - The application should maintain a separate state to support CheckTx. - This state can be reset to the latest committed state during - `Commit`. Before calling Commit, Tendermint will lock and flush the mempool, - ensuring that all existing CheckTx are responded to and no new ones can - begin. After `Commit`, the mempool will rerun - CheckTx for all remaining transactions, throwing out any that are no longer valid. - Then the mempool will unlock and start sending CheckTx again. - - Keys and values in Tags must be UTF-8 encoded strings (e.g. - "account.owner": "Bob", "balance": "100.0", "date": "2018-01-02") +- **Request**: + - `Tx ([]byte)`: The request transaction bytes +- **Response**: + - `Code (uint32)`: Response code + - `Data ([]byte)`: Result bytes, if any. + - `Log (string)`: The output of the application's logger. May + be non-deterministic. + - `Info (string)`: Additional information. May + be non-deterministic. + - `GasWanted (int64)`: Amount of gas request for transaction. + - `GasUsed (int64)`: Amount of gas consumed by transaction. + - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing + transactions (eg. by account). + - `Fee (cmn.KI64Pair)`: Fee paid for the transaction. +- **Usage**: Validate a mempool transaction, prior to broadcasting + or proposing. CheckTx should perform stateful but light-weight + checks of the validity of the transaction (like checking signatures + and account balances), but need not execute in full (like running a + smart contract). + + Tendermint runs CheckTx and DeliverTx concurrently with eachother, + though on distinct ABCI connections - the mempool connection and the + consensus connection, respectively. + + The application should maintain a separate state to support CheckTx. + This state can be reset to the latest committed state during + `Commit`. Before calling Commit, Tendermint will lock and flush the mempool, + ensuring that all existing CheckTx are responded to and no new ones can + begin. After `Commit`, the mempool will rerun + CheckTx for all remaining transactions, throwing out any that are no longer valid. + Then the mempool will unlock and start sending CheckTx again. + + Keys and values in Tags must be UTF-8 encoded strings (e.g. + "account.owner": "Bob", "balance": "100.0", "date": "2018-01-02") ### DeliverTx -- **Request**: - - `Tx ([]byte)`: The request transaction bytes. -- **Response**: - - `Code (uint32)`: Response code. - - `Data ([]byte)`: Result bytes, if any. - - `Log (string)`: The output of the application's logger. May - be non-deterministic. - - `Info (string)`: Additional information. May - be non-deterministic. - - `GasWanted (int64)`: Amount of gas requested for transaction. - - `GasUsed (int64)`: Amount of gas consumed by transaction. - - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing - transactions (eg. by account). - - `Fee (cmn.KI64Pair)`: Fee paid for the transaction. -- **Usage**: - - Deliver a transaction to be executed in full by the application. - If the transaction is valid, returns CodeType.OK. - - Keys and values in Tags must be UTF-8 encoded strings (e.g. - "account.owner": "Bob", "balance": "100.0", - "time": "2018-01-02T12:30:00Z") +- **Request**: + - `Tx ([]byte)`: The request transaction bytes. +- **Response**: + - `Code (uint32)`: Response code. + - `Data ([]byte)`: Result bytes, if any. + - `Log (string)`: The output of the application's logger. May + be non-deterministic. + - `Info (string)`: Additional information. May + be non-deterministic. + - `GasWanted (int64)`: Amount of gas requested for transaction. + - `GasUsed (int64)`: Amount of gas consumed by transaction. + - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing + transactions (eg. by account). + - `Fee (cmn.KI64Pair)`: Fee paid for the transaction. +- **Usage**: + - Deliver a transaction to be executed in full by the application. + If the transaction is valid, returns CodeType.OK. + - Keys and values in Tags must be UTF-8 encoded strings (e.g. + "account.owner": "Bob", "balance": "100.0", + "time": "2018-01-02T12:30:00Z") ### EndBlock -- **Request**: - - `Height (int64)`: Height of the block just executed. -- **Response**: - - `ValidatorUpdates ([]Validator)`: Changes to validator set (set - voting power to 0 to remove). - - `ConsensusParamUpdates (ConsensusParams)`: Changes to - consensus-critical time, size, and other parameters. - - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing -- **Usage**: - - Signals the end of a block. - - Called prior to each Commit, after all transactions. - - Validator set and consensus params are updated with the result. - - Validator pubkeys are expected to be go-wire encoded. +- **Request**: + - `Height (int64)`: Height of the block just executed. +- **Response**: + - `ValidatorUpdates ([]Validator)`: Changes to validator set (set + voting power to 0 to remove). + - `ConsensusParamUpdates (ConsensusParams)`: Changes to + consensus-critical time, size, and other parameters. + - `Tags ([]cmn.KVPair)`: Key-Value tags for filtering and indexing +- **Usage**: + - Signals the end of a block. + - Called prior to each Commit, after all transactions. + - Validator set and consensus params are updated with the result. + - Validator pubkeys are expected to be go-wire encoded. ### Commit -- **Response**: - - `Data ([]byte)`: The Merkle root hash -- **Usage**: - - Persist the application state. - - Return a Merkle root hash of the application state. - - It's critical that all application instances return the - same hash. If not, they will not be able to agree on the next - block, because the hash is included in the next block! +- **Response**: + - `Data ([]byte)`: The Merkle root hash +- **Usage**: + - Persist the application state. + - Return a Merkle root hash of the application state. + - It's critical that all application instances return the + same hash. If not, they will not be able to agree on the next + block, because the hash is included in the next block! ## Data Messages ### Header - **Fields**: - - `ChainID (string)`: ID of the blockchain - - `Height (int64)`: Height of the block in the chain - - `Time (int64)`: Unix time of the block - - `NumTxs (int32)`: Number of transactions in the block - - `TotalTxs (int64)`: Total number of transactions in the blockchain until - now - - `LastBlockHash ([]byte)`: Hash of the previous (parent) block - - `ValidatorsHash ([]byte)`: Hash of the validator set for this block - - `AppHash ([]byte)`: Data returned by the last call to `Commit` - typically the - Merkle root of the application state after executing the previous block's - transactions - - `Proposer (Validator)`: Original proposer for the block + - `ChainID (string)`: ID of the blockchain + - `Height (int64)`: Height of the block in the chain + - `Time (int64)`: Unix time of the block + - `NumTxs (int32)`: Number of transactions in the block + - `TotalTxs (int64)`: Total number of transactions in the blockchain until + now + - `LastBlockHash ([]byte)`: Hash of the previous (parent) block + - `ValidatorsHash ([]byte)`: Hash of the validator set for this block + - `AppHash ([]byte)`: Data returned by the last call to `Commit` - typically the + Merkle root of the application state after executing the previous block's + transactions + - `Proposer (Validator)`: Original proposer for the block - **Usage**: - - Provided in RequestBeginBlock - - Provides important context about the current state of the blockchain - - especially height and time. - - Provides the proposer of the current block, for use in proposer-based - reward mechanisms. + - Provided in RequestBeginBlock + - Provides important context about the current state of the blockchain - + especially height and time. + - Provides the proposer of the current block, for use in proposer-based + reward mechanisms. ### Validator - **Fields**: - - `Address ([]byte)`: Address of the validator (hash of the public key) - - `PubKey (PubKey)`: Public key of the validator - - `Power (int64)`: Voting power of the validator + - `Address ([]byte)`: Address of the validator (hash of the public key) + - `PubKey (PubKey)`: Public key of the validator + - `Power (int64)`: Voting power of the validator - **Usage**: - - Provides all identifying information about the validator + - Provides all identifying information about the validator ### SigningValidator - **Fields**: - - `Validator (Validator)`: A validator - - `SignedLastBlock (bool)`: Indicated whether or not the validator signed - the last block + - `Validator (Validator)`: A validator + - `SignedLastBlock (bool)`: Indicated whether or not the validator signed + the last block - **Usage**: - - Indicates whether a validator signed the last block, allowing for rewards - based on validator availability + - Indicates whether a validator signed the last block, allowing for rewards + based on validator availability ### PubKey - **Fields**: - - `Type (string)`: Type of the public key. A simple string like `"ed25519"`. - In the future, may indicate a serialization algorithm to parse the `Data`, - for instance `"amino"`. - - `Data ([]byte)`: Public key data. For a simple public key, it's just the - raw bytes. If the `Type` indicates an encoding algorithm, this is the - encoded public key. + - `Type (string)`: Type of the public key. A simple string like `"ed25519"`. + In the future, may indicate a serialization algorithm to parse the `Data`, + for instance `"amino"`. + - `Data ([]byte)`: Public key data. For a simple public key, it's just the + raw bytes. If the `Type` indicates an encoding algorithm, this is the + encoded public key. - **Usage**: - - A generic and extensible typed public key + - A generic and extensible typed public key ### Evidence - **Fields**: - - `Type (string)`: Type of the evidence. A hierarchical path like - "duplicate/vote". - - `Validator (Validator`: The offending validator - - `Height (int64)`: Height when the offense was committed - - `Time (int64)`: Unix time of the block at height `Height` - - `TotalVotingPower (int64)`: Total voting power of the validator set at - height `Height` + - `Type (string)`: Type of the evidence. A hierarchical path like + "duplicate/vote". + - `Validator (Validator`: The offending validator + - `Height (int64)`: Height when the offense was committed + - `Time (int64)`: Unix time of the block at height `Height` + - `TotalVotingPower (int64)`: Total voting power of the validator set at + height `Height` diff --git a/docs/app-architecture.md b/docs/app-architecture.md index 401e28cca..9ce0fae9f 100644 --- a/docs/app-architecture.md +++ b/docs/app-architecture.md @@ -17,7 +17,7 @@ transaction is actually processed. The ABCI application must be a deterministic result of the Tendermint consensus - any external influence on the application state that didn't -come through Tendermint could cause a consensus failure. Thus *nothing* +come through Tendermint could cause a consensus failure. Thus _nothing_ should communicate with the application except Tendermint via ABCI. If the application is written in Go, it can be compiled into the @@ -43,6 +43,7 @@ all transactions, and possibly all queries, should still pass through Tendermint. See the following for more extensive documentation: + - [Interchain Standard for the Light-Client REST API](https://github.com/cosmos/cosmos-sdk/pull/1028) - [Tendermint RPC Docs](https://tendermint.github.io/slate/) - [Tendermint in Production](https://github.com/tendermint/tendermint/pull/1618) diff --git a/docs/app-development.md b/docs/app-development.md index f8c70f21b..a795673f1 100644 --- a/docs/app-development.md +++ b/docs/app-development.md @@ -16,28 +16,27 @@ committed in hash-linked blocks. The ABCI design has a few distinct components: -- message protocol - - pairs of request and response messages - - consensus makes requests, application responds - - defined using protobuf -- server/client - - consensus engine runs the client - - application runs the server - - two implementations: - - async raw bytes - - grpc -- blockchain protocol - - abci is connection oriented - - Tendermint Core maintains three connections: - - [mempool connection](#mempool-connection): for checking if - transactions should be relayed before they are committed; - only uses `CheckTx` - - [consensus connection](#consensus-connection): for executing - transactions that have been committed. Message sequence is - -for every block - -`BeginBlock, [DeliverTx, ...], EndBlock, Commit` - - [query connection](#query-connection): for querying the - application state; only uses Query and Info +- message protocol + - pairs of request and response messages + - consensus makes requests, application responds + - defined using protobuf +- server/client + - consensus engine runs the client + - application runs the server + - two implementations: + - async raw bytes + - grpc +- blockchain protocol + - abci is connection oriented + - Tendermint Core maintains three connections: + - [mempool connection](#mempool-connection): for checking if + transactions should be relayed before they are committed; + only uses `CheckTx` + - [consensus connection](#consensus-connection): for executing + transactions that have been committed. Message sequence is + -for every block -`BeginBlock, [DeliverTx, ...], EndBlock, Commit` + - [query connection](#query-connection): for querying the + application state; only uses Query and Info The mempool and consensus logic act as clients, and each maintains an open ABCI connection with the application, which hosts an ABCI server. @@ -64,9 +63,9 @@ To use ABCI in your programming language of choice, there must be a ABCI server in that language. Tendermint supports two kinds of implementation of the server: -- Asynchronous, raw socket server (Tendermint Socket Protocol, also - known as TSP or Teaspoon) -- GRPC +- Asynchronous, raw socket server (Tendermint Socket Protocol, also + known as TSP or Teaspoon) +- GRPC Both can be tested using the `abci-cli` by setting the `--abci` flag appropriately (ie. to `socket` or `grpc`). @@ -161,7 +160,7 @@ connection, to query the local state of the app. ### Mempool Connection -The mempool connection is used *only* for CheckTx requests. Transactions +The mempool connection is used _only_ for CheckTx requests. Transactions are run using CheckTx in the same order they were received by the validator. If the CheckTx returns `OK`, the transaction is kept in memory and relayed to other peers in the same order it was received. @@ -180,23 +179,27 @@ mempool state (this behaviour can be turned off with In go: - func (app *KVStoreApplication) CheckTx(tx []byte) types.Result { - return types.OK - } +``` +func (app *KVStoreApplication) CheckTx(tx []byte) types.Result { + return types.OK +} +``` In Java: - ResponseCheckTx requestCheckTx(RequestCheckTx req) { - byte[] transaction = req.getTx().toByteArray(); +``` +ResponseCheckTx requestCheckTx(RequestCheckTx req) { + byte[] transaction = req.getTx().toByteArray(); - // validate transaction + // validate transaction - if (notValid) { - return ResponseCheckTx.newBuilder().setCode(CodeType.BadNonce).setLog("invalid tx").build(); - } else { - return ResponseCheckTx.newBuilder().setCode(CodeType.OK).build(); - } + if (notValid) { + return ResponseCheckTx.newBuilder().setCode(CodeType.BadNonce).setLog("invalid tx").build(); + } else { + return ResponseCheckTx.newBuilder().setCode(CodeType.OK).build(); } +} +``` ### Replay Protection @@ -242,43 +245,47 @@ merkle root of the data returned by the DeliverTx requests, or both. In go: - // tx is either "key=value" or just arbitrary bytes - func (app *KVStoreApplication) DeliverTx(tx []byte) types.Result { - parts := strings.Split(string(tx), "=") - if len(parts) == 2 { - app.state.Set([]byte(parts[0]), []byte(parts[1])) - } else { - app.state.Set(tx, tx) - } - return types.OK - } +``` +// tx is either "key=value" or just arbitrary bytes +func (app *KVStoreApplication) DeliverTx(tx []byte) types.Result { + parts := strings.Split(string(tx), "=") + if len(parts) == 2 { + app.state.Set([]byte(parts[0]), []byte(parts[1])) + } else { + app.state.Set(tx, tx) + } + return types.OK +} +``` In Java: - /** - * Using Protobuf types from the protoc compiler, we always start with a byte[] - */ - ResponseDeliverTx deliverTx(RequestDeliverTx request) { - byte[] transaction = request.getTx().toByteArray(); +``` +/** + * Using Protobuf types from the protoc compiler, we always start with a byte[] + */ +ResponseDeliverTx deliverTx(RequestDeliverTx request) { + byte[] transaction = request.getTx().toByteArray(); - // validate your transaction - - if (notValid) { - return ResponseDeliverTx.newBuilder().setCode(CodeType.BadNonce).setLog("transaction was invalid").build(); - } else { - ResponseDeliverTx.newBuilder().setCode(CodeType.OK).build(); - } + // validate your transaction + if (notValid) { + return ResponseDeliverTx.newBuilder().setCode(CodeType.BadNonce).setLog("transaction was invalid").build(); + } else { + ResponseDeliverTx.newBuilder().setCode(CodeType.OK).build(); } +} +``` + ### Commit Once all processing of the block is complete, Tendermint sends the Commit request and blocks waiting for a response. While the mempool may run concurrently with block processing (the BeginBlock, DeliverTxs, and EndBlock), it is locked for the Commit request so that its state can be -safely reset during Commit. This means the app *MUST NOT* do any -blocking communication with the mempool (ie. broadcast\_tx) during +safely reset during Commit. This means the app _MUST NOT_ do any +blocking communication with the mempool (ie. broadcast_tx) during Commit, or there will be deadlock. Note also that all remaining transactions in the mempool are replayed on the mempool connection (CheckTx) following a commit. @@ -294,21 +301,25 @@ job of the [Handshake](#handshake). In go: - func (app *KVStoreApplication) Commit() types.Result { - hash := app.state.Hash() - return types.NewResultOK(hash, "") - } +``` +func (app *KVStoreApplication) Commit() types.Result { + hash := app.state.Hash() + return types.NewResultOK(hash, "") +} +``` In Java: - ResponseCommit requestCommit(RequestCommit requestCommit) { +``` +ResponseCommit requestCommit(RequestCommit requestCommit) { - // update the internal app-state - byte[] newAppState = calculateAppState(); + // update the internal app-state + byte[] newAppState = calculateAppState(); - // and return it to the node - return ResponseCommit.newBuilder().setCode(CodeType.OK).setData(ByteString.copyFrom(newAppState)).build(); - } + // and return it to the node + return ResponseCommit.newBuilder().setCode(CodeType.OK).setData(ByteString.copyFrom(newAppState)).build(); +} +``` ### BeginBlock @@ -322,31 +333,35 @@ pick up from when it restarts. See information on the Handshake, below. In go: - // Track the block hash and header information - func (app *PersistentKVStoreApplication) BeginBlock(params types.RequestBeginBlock) { - // update latest block info - app.blockHeader = params.Header +``` +// Track the block hash and header information +func (app *PersistentKVStoreApplication) BeginBlock(params types.RequestBeginBlock) { + // update latest block info + app.blockHeader = params.Header - // reset valset changes - app.changes = make([]*types.Validator, 0) - } + // reset valset changes + app.changes = make([]*types.Validator, 0) +} +``` In Java: - /* - * all types come from protobuf definition - */ - ResponseBeginBlock requestBeginBlock(RequestBeginBlock req) { +``` +/* + * all types come from protobuf definition + */ +ResponseBeginBlock requestBeginBlock(RequestBeginBlock req) { - Header header = req.getHeader(); - byte[] prevAppHash = header.getAppHash().toByteArray(); - long prevHeight = header.getHeight(); - long numTxs = header.getNumTxs(); + Header header = req.getHeader(); + byte[] prevAppHash = header.getAppHash().toByteArray(); + long prevHeight = header.getHeight(); + long numTxs = header.getNumTxs(); - // run your pre-block logic. Maybe prepare a state snapshot, message components, etc + // run your pre-block logic. Maybe prepare a state snapshot, message components, etc - return ResponseBeginBlock.newBuilder().build(); - } + return ResponseBeginBlock.newBuilder().build(); +} +``` ### EndBlock @@ -364,25 +379,29 @@ for details on how it tracks validators. In go: - // Update the validator set - func (app *PersistentKVStoreApplication) EndBlock(req types.RequestEndBlock) types.ResponseEndBlock { - return types.ResponseEndBlock{ValidatorUpdates: app.ValUpdates} - } +``` +// Update the validator set +func (app *PersistentKVStoreApplication) EndBlock(req types.RequestEndBlock) types.ResponseEndBlock { + return types.ResponseEndBlock{ValidatorUpdates: app.ValUpdates} +} +``` In Java: - /* - * Assume that one validator changes. The new validator has a power of 10 - */ - ResponseEndBlock requestEndBlock(RequestEndBlock req) { - final long currentHeight = req.getHeight(); - final byte[] validatorPubKey = getValPubKey(); +``` +/* + * Assume that one validator changes. The new validator has a power of 10 + */ +ResponseEndBlock requestEndBlock(RequestEndBlock req) { + final long currentHeight = req.getHeight(); + final byte[] validatorPubKey = getValPubKey(); - ResponseEndBlock.Builder builder = ResponseEndBlock.newBuilder(); - builder.addDiffs(1, Types.Validator.newBuilder().setPower(10L).setPubKey(ByteString.copyFrom(validatorPubKey)).build()); + ResponseEndBlock.Builder builder = ResponseEndBlock.newBuilder(); + builder.addDiffs(1, Types.Validator.newBuilder().setPower(10L).setPubKey(ByteString.copyFrom(validatorPubKey)).build()); - return builder.build(); - } + return builder.build(); +} +``` ### Query Connection @@ -398,67 +417,71 @@ connecting, according to IP address or node ID. For instance, returning non-OK ABCI response to either of the following queries will cause Tendermint to not connect to the corresponding peer: -- `p2p/filter/addr/`, where `` is an IP address. -- `p2p/filter/id/`, where `` is the hex-encoded node ID (the hash of - the node's p2p pubkey). +- `p2p/filter/addr/`, where `` is an IP address. +- `p2p/filter/id/`, where `` is the hex-encoded node ID (the hash of + the node's p2p pubkey). Note: these query formats are subject to change! In go: - func (app *KVStoreApplication) Query(reqQuery types.RequestQuery) (resQuery types.ResponseQuery) { - if reqQuery.Prove { - value, proof, exists := app.state.Proof(reqQuery.Data) - resQuery.Index = -1 // TODO make Proof return index - resQuery.Key = reqQuery.Data - resQuery.Value = value - resQuery.Proof = proof - if exists { - resQuery.Log = "exists" - } else { - resQuery.Log = "does not exist" - } - return - } else { - index, value, exists := app.state.Get(reqQuery.Data) - resQuery.Index = int64(index) - resQuery.Value = value - if exists { - resQuery.Log = "exists" - } else { - resQuery.Log = "does not exist" - } - return - } +``` +func (app *KVStoreApplication) Query(reqQuery types.RequestQuery) (resQuery types.ResponseQuery) { + if reqQuery.Prove { + value, proof, exists := app.state.Proof(reqQuery.Data) + resQuery.Index = -1 // TODO make Proof return index + resQuery.Key = reqQuery.Data + resQuery.Value = value + resQuery.Proof = proof + if exists { + resQuery.Log = "exists" + } else { + resQuery.Log = "does not exist" } + return + } else { + index, value, exists := app.state.Get(reqQuery.Data) + resQuery.Index = int64(index) + resQuery.Value = value + if exists { + resQuery.Log = "exists" + } else { + resQuery.Log = "does not exist" + } + return + } +} +``` In Java: - ResponseQuery requestQuery(RequestQuery req) { - final boolean isProveQuery = req.getProve(); - final ResponseQuery.Builder responseBuilder = ResponseQuery.newBuilder(); - - if (isProveQuery) { - com.app.example.ProofResult proofResult = generateProof(req.getData().toByteArray()); - final byte[] proofAsByteArray = proofResult.getAsByteArray(); +``` +ResponseQuery requestQuery(RequestQuery req) { + final boolean isProveQuery = req.getProve(); + final ResponseQuery.Builder responseBuilder = ResponseQuery.newBuilder(); - responseBuilder.setProof(ByteString.copyFrom(proofAsByteArray)); - responseBuilder.setKey(req.getData()); - responseBuilder.setValue(ByteString.copyFrom(proofResult.getData())); - responseBuilder.setLog(result.getLogValue()); - } else { - byte[] queryData = req.getData().toByteArray(); + if (isProveQuery) { + com.app.example.ProofResult proofResult = generateProof(req.getData().toByteArray()); + final byte[] proofAsByteArray = proofResult.getAsByteArray(); - final com.app.example.QueryResult result = generateQueryResult(queryData); + responseBuilder.setProof(ByteString.copyFrom(proofAsByteArray)); + responseBuilder.setKey(req.getData()); + responseBuilder.setValue(ByteString.copyFrom(proofResult.getData())); + responseBuilder.setLog(result.getLogValue()); + } else { + byte[] queryData = req.getData().toByteArray(); - responseBuilder.setIndex(result.getIndex()); - responseBuilder.setValue(ByteString.copyFrom(result.getValue())); - responseBuilder.setLog(result.getLogValue()); - } + final com.app.example.QueryResult result = generateQueryResult(queryData); - return responseBuilder.build(); + responseBuilder.setIndex(result.getIndex()); + responseBuilder.setValue(ByteString.copyFrom(result.getValue())); + responseBuilder.setLog(result.getLogValue()); } + return responseBuilder.build(); +} +``` + ### Handshake When the app or tendermint restarts, they need to sync to a common @@ -477,17 +500,21 @@ all blocks. In go: - func (app *KVStoreApplication) Info(req types.RequestInfo) (resInfo types.ResponseInfo) { - return types.ResponseInfo{Data: cmn.Fmt("{\"size\":%v}", app.state.Size())} - } +``` +func (app *KVStoreApplication) Info(req types.RequestInfo) (resInfo types.ResponseInfo) { + return types.ResponseInfo{Data: cmn.Fmt("{\"size\":%v}", app.state.Size())} +} +``` In Java: - ResponseInfo requestInfo(RequestInfo req) { - final byte[] lastAppHash = getLastAppHash(); - final long lastHeight = getLastHeight(); - return ResponseInfo.newBuilder().setLastBlockAppHash(ByteString.copyFrom(lastAppHash)).setLastBlockHeight(lastHeight).build(); - } +``` +ResponseInfo requestInfo(RequestInfo req) { + final byte[] lastAppHash = getLastAppHash(); + final long lastHeight = getLastHeight(); + return ResponseInfo.newBuilder().setLastBlockAppHash(ByteString.copyFrom(lastAppHash)).setLastBlockHeight(lastHeight).build(); +} +``` ### Genesis @@ -497,31 +524,35 @@ consensus params. In go: - // Save the validators in the merkle tree - func (app *PersistentKVStoreApplication) InitChain(params types.RequestInitChain) { - for _, v := range params.Validators { - r := app.updateValidator(v) - if r.IsErr() { - app.logger.Error("Error updating validators", "r", r) - } - } +``` +// Save the validators in the merkle tree +func (app *PersistentKVStoreApplication) InitChain(params types.RequestInitChain) { + for _, v := range params.Validators { + r := app.updateValidator(v) + if r.IsErr() { + app.logger.Error("Error updating validators", "r", r) } + } +} +``` In Java: - /* - * all types come from protobuf definition - */ - ResponseInitChain requestInitChain(RequestInitChain req) { - final int validatorsCount = req.getValidatorsCount(); - final List validatorsList = req.getValidatorsList(); +``` +/* + * all types come from protobuf definition + */ +ResponseInitChain requestInitChain(RequestInitChain req) { + final int validatorsCount = req.getValidatorsCount(); + final List validatorsList = req.getValidatorsList(); - validatorsList.forEach((validator) -> { - long power = validator.getPower(); - byte[] validatorPubKey = validator.getPubKey().toByteArray(); + validatorsList.forEach((validator) -> { + long power = validator.getPower(); + byte[] validatorPubKey = validator.getPubKey().toByteArray(); - // do somehing for validator setup in app - }); + // do somehing for validator setup in app + }); - return ResponseInitChain.newBuilder().build(); - } + return ResponseInitChain.newBuilder().build(); +} +``` diff --git a/docs/deploy-testnets.md b/docs/deploy-testnets.md index 334739e50..88e5c6f72 100644 --- a/docs/deploy-testnets.md +++ b/docs/deploy-testnets.md @@ -16,30 +16,29 @@ to. Here are the steps to setting up a testnet manually: -1) Provision nodes on your cloud provider of choice -2) Install Tendermint and the application of interest on all nodes -3) Generate a private key and a node key for each validator using +1. Provision nodes on your cloud provider of choice +2. Install Tendermint and the application of interest on all nodes +3. Generate a private key and a node key for each validator using `tendermint init` -4) Compile a list of public keys for each validator into a +4. Compile a list of public keys for each validator into a `genesis.json` file and replace the existing file with it. -5) Run - `tendermint node --proxy_app=kvstore --p2p.persistent_peers=< peer - addresses >` on each node, where `< peer addresses >` is a comma separated +5. Run + `tendermint node --proxy_app=kvstore --p2p.persistent_peers=< peer addresses >` on each node, where `< peer addresses >` is a comma separated list of the ID@IP:PORT combination for each node. The default port for Tendermint is `26656`. The ID of a node can be obtained by running `tendermint show_node_id` command. Thus, if the IP addresses of your nodes were `192.168.0.1, 192.168.0.2, 192.168.0.3, 192.168.0.4`, the command would look like: - - tendermint node --proxy_app=kvstore --p2p.persistent_peers=96663a3dd0d7b9d17d4c8211b191af259621c693@192.168.0.1:26656, 429fcf25974313b95673f58d77eacdd434402665@192.168.0.2:26656, 0491d373a8e0fcf1023aaf18c51d6a1d0d4f31bd@192.168.0.3:26656, f9baeaa15fedf5e1ef7448dd60f46c01f1a9e9c4@192.168.0.4:26656 +``` +tendermint node --proxy_app=kvstore --p2p.persistent_peers=96663a3dd0d7b9d17d4c8211b191af259621c693@192.168.0.1:26656, 429fcf25974313b95673f58d77eacdd434402665@192.168.0.2:26656, 0491d373a8e0fcf1023aaf18c51d6a1d0d4f31bd@192.168.0.3:26656, f9baeaa15fedf5e1ef7448dd60f46c01f1a9e9c4@192.168.0.4:26656 +``` After a few seconds, all the nodes should connect to each other and start making blocks! For more information, see the Tendermint Networks section of [the guide to using Tendermint](./using-tendermint.md). -But wait! Steps 3, 4 and 5 are quite manual. Instead, use the `tendermint -testnet` command. By default, running `tendermint testnet` will create all the +But wait! Steps 3, 4 and 5 are quite manual. Instead, use the `tendermint testnet` command. By default, running `tendermint testnet` will create all the required files, but it won't populate the list of persistent peers. It will do it however if you provide the `--populate-persistent-peers` flag and optional `--starting-ip-address` flag. Run `tendermint testnet --help` for more details @@ -63,7 +62,9 @@ The easiest and fastest way to get a testnet up in less than 5 minutes. With `docker` and `docker-compose` installed, run the command: - make localnet-start +``` +make localnet-start +``` from the root of the tendermint repository. This will spin up a 4-node local testnet. Review the target in the Makefile to debug any problems. diff --git a/docs/ecosystem.md b/docs/ecosystem.md index 6b7f833a8..0f1951a08 100644 --- a/docs/ecosystem.md +++ b/docs/ecosystem.md @@ -3,7 +3,7 @@ The growing list of applications built using various pieces of the Tendermint stack can be found at: -- https://tendermint.com/ecosystem +- https://tendermint.com/ecosystem We thank the community for their contributions thus far and welcome the addition of new projects. A pull request can be submitted to [this diff --git a/docs/examples/getting-started.md b/docs/examples/getting-started.md index 3a62c9707..7c4663116 100644 --- a/docs/examples/getting-started.md +++ b/docs/examples/getting-started.md @@ -24,6 +24,7 @@ The script is also used to facilitate cluster deployment below. ### Manual Install Requires: + - `go` minimum version 1.10 - `$GOPATH` environment variable must be set - `$GOPATH/bin` must be on your `$PATH` (see https://github.com/tendermint/tendermint/wiki/Setting-GOPATH) diff --git a/docs/getting-started.md b/docs/getting-started.md index 1fa1405f2..cfc614ddc 100644 --- a/docs/getting-started.md +++ b/docs/getting-started.md @@ -25,11 +25,13 @@ more info. Then run - go get github.com/tendermint/tendermint - cd $GOPATH/src/github.com/tendermint/tendermint - make get_tools - make get_vendor_deps - make install_abci +``` +go get github.com/tendermint/tendermint +cd $GOPATH/src/github.com/tendermint/tendermint +make get_tools +make get_vendor_deps +make install_abci +``` Now you should have the `abci-cli` installed; you'll see a couple of commands (`counter` and `kvstore`) that are example applications written @@ -47,13 +49,17 @@ full transaction bytes are stored as the key and the value. Let's start a kvstore application. - abci-cli kvstore +``` +abci-cli kvstore +``` In another terminal, we can start Tendermint. If you have never run Tendermint before, use: - tendermint init - tendermint node +``` +tendermint init +tendermint node +``` If you have used Tendermint, you may want to reset the data for a new blockchain by running `tendermint unsafe_reset_all`. Then you can run @@ -63,14 +69,18 @@ details, see [the guide on using Tendermint](./using-tendermint.md). You should see Tendermint making blocks! We can get the status of our Tendermint node as follows: - curl -s localhost:26657/status +``` +curl -s localhost:26657/status +``` The `-s` just silences `curl`. For nicer output, pipe the result into a tool like [jq](https://stedolan.github.io/jq/) or `json_pp`. Now let's send some transactions to the kvstore. - curl -s 'localhost:26657/broadcast_tx_commit?tx="abcd"' +``` +curl -s 'localhost:26657/broadcast_tx_commit?tx="abcd"' +``` Note the single quote (`'`) around the url, which ensures that the double quotes (`"`) are not escaped by bash. This command sent a @@ -78,50 +88,56 @@ transaction with bytes `abcd`, so `abcd` will be stored as both the key and the value in the Merkle tree. The response should look something like: - { - "jsonrpc": "2.0", - "id": "", - "result": { - "check_tx": { - "fee": {} +``` +{ + "jsonrpc": "2.0", + "id": "", + "result": { + "check_tx": { + "fee": {} + }, + "deliver_tx": { + "tags": [ + { + "key": "YXBwLmNyZWF0b3I=", + "value": "amFl" }, - "deliver_tx": { - "tags": [ - { - "key": "YXBwLmNyZWF0b3I=", - "value": "amFl" - }, - { - "key": "YXBwLmtleQ==", - "value": "YWJjZA==" - } - ], - "fee": {} - }, - "hash": "9DF66553F98DE3C26E3C3317A3E4CED54F714E39", - "height": 14 - } - } + { + "key": "YXBwLmtleQ==", + "value": "YWJjZA==" + } + ], + "fee": {} + }, + "hash": "9DF66553F98DE3C26E3C3317A3E4CED54F714E39", + "height": 14 + } +} +``` We can confirm that our transaction worked and the value got stored by querying the app: - curl -s 'localhost:26657/abci_query?data="abcd"' +``` +curl -s 'localhost:26657/abci_query?data="abcd"' +``` The result should look like: - { - "jsonrpc": "2.0", - "id": "", - "result": { - "response": { - "log": "exists", - "index": "-1", - "key": "YWJjZA==", - "value": "YWJjZA==" - } - } +``` +{ + "jsonrpc": "2.0", + "id": "", + "result": { + "response": { + "log": "exists", + "index": "-1", + "key": "YWJjZA==", + "value": "YWJjZA==" } + } +} +``` Note the `value` in the result (`YWJjZA==`); this is the base64-encoding of the ASCII of `abcd`. You can verify this in a python 2 shell by @@ -132,12 +148,16 @@ human-readable](https://github.com/tendermint/tendermint/issues/1794). Now let's try setting a different key and value: - curl -s 'localhost:26657/broadcast_tx_commit?tx="name=satoshi"' +``` +curl -s 'localhost:26657/broadcast_tx_commit?tx="name=satoshi"' +``` Now if we query for `name`, we should get `satoshi`, or `c2F0b3NoaQ==` in base64: - curl -s 'localhost:26657/abci_query?data="name"' +``` +curl -s 'localhost:26657/abci_query?data="name"' +``` Try some other transactions and queries to make sure everything is working! @@ -171,57 +191,67 @@ Let's kill the previous instance of `tendermint` and the `kvstore` application, and start the counter app. We can enable `serial=on` with a flag: - abci-cli counter --serial +``` +abci-cli counter --serial +``` In another window, reset then start Tendermint: - tendermint unsafe_reset_all - tendermint node +``` +tendermint unsafe_reset_all +tendermint node +``` Once again, you can see the blocks streaming by. Let's send some transactions. Since we have set `serial=on`, the first transaction must be the number `0`: - curl localhost:26657/broadcast_tx_commit?tx=0x00 +``` +curl localhost:26657/broadcast_tx_commit?tx=0x00 +``` Note the empty (hence successful) response. The next transaction must be the number `1`. If instead, we try to send a `5`, we get an error: - > curl localhost:26657/broadcast_tx_commit?tx=0x05 - { - "jsonrpc": "2.0", - "id": "", - "result": { - "check_tx": { - "fee": {} - }, - "deliver_tx": { - "code": 2, - "log": "Invalid nonce. Expected 1, got 5", - "fee": {} - }, - "hash": "33B93DFF98749B0D6996A70F64071347060DC19C", - "height": 34 - } - } +``` +> curl localhost:26657/broadcast_tx_commit?tx=0x05 +{ + "jsonrpc": "2.0", + "id": "", + "result": { + "check_tx": { + "fee": {} + }, + "deliver_tx": { + "code": 2, + "log": "Invalid nonce. Expected 1, got 5", + "fee": {} + }, + "hash": "33B93DFF98749B0D6996A70F64071347060DC19C", + "height": 34 + } +} +``` But if we send a `1`, it works again: - > curl localhost:26657/broadcast_tx_commit?tx=0x01 - { - "jsonrpc": "2.0", - "id": "", - "result": { - "check_tx": { - "fee": {} - }, - "deliver_tx": { - "fee": {} - }, - "hash": "F17854A977F6FA7EEA1BD758E296710B86F72F3D", - "height": 60 - } - } +``` +> curl localhost:26657/broadcast_tx_commit?tx=0x01 +{ + "jsonrpc": "2.0", + "id": "", + "result": { + "check_tx": { + "fee": {} + }, + "deliver_tx": { + "fee": {} + }, + "hash": "F17854A977F6FA7EEA1BD758E296710B86F72F3D", + "height": 60 + } +} +``` For more details on the `broadcast_tx` API, see [the guide on using Tendermint](./using-tendermint.md). @@ -236,26 +266,34 @@ You'll also need to fetch the relevant repository, from [here](https://github.com/tendermint/js-abci) then install it. As go devs, we keep all our code under the `$GOPATH`, so run: - go get github.com/tendermint/js-abci &> /dev/null - cd $GOPATH/src/github.com/tendermint/js-abci/example - npm install - cd .. +``` +go get github.com/tendermint/js-abci &> /dev/null +cd $GOPATH/src/github.com/tendermint/js-abci/example +npm install +cd .. +``` Kill the previous `counter` and `tendermint` processes. Now run the app: - node example/counter.js +``` +node example/counter.js +``` In another window, reset and start `tendermint`: - tendermint unsafe_reset_all - tendermint node +``` +tendermint unsafe_reset_all +tendermint node +``` Once again, you should see blocks streaming by - but now, our application is written in javascript! Try sending some transactions, and like before - the results should be the same: - curl localhost:26657/broadcast_tx_commit?tx=0x00 # ok - curl localhost:26657/broadcast_tx_commit?tx=0x05 # invalid nonce - curl localhost:26657/broadcast_tx_commit?tx=0x01 # ok +``` +curl localhost:26657/broadcast_tx_commit?tx=0x00 # ok +curl localhost:26657/broadcast_tx_commit?tx=0x05 # invalid nonce +curl localhost:26657/broadcast_tx_commit?tx=0x01 # ok +``` Neat, eh? diff --git a/docs/how-to-read-logs.md b/docs/how-to-read-logs.md index 2b019e549..83dab3870 100644 --- a/docs/how-to-read-logs.md +++ b/docs/how-to-read-logs.md @@ -5,49 +5,59 @@ We first create three connections (mempool, consensus and query) to the application (running `kvstore` locally in this case). - I[10-04|13:54:27.364] Starting multiAppConn module=proxy impl=multiAppConn - I[10-04|13:54:27.366] Starting localClient module=abci-client connection=query impl=localClient - I[10-04|13:54:27.366] Starting localClient module=abci-client connection=mempool impl=localClient - I[10-04|13:54:27.367] Starting localClient module=abci-client connection=consensus impl=localClient +``` +I[10-04|13:54:27.364] Starting multiAppConn module=proxy impl=multiAppConn +I[10-04|13:54:27.366] Starting localClient module=abci-client connection=query impl=localClient +I[10-04|13:54:27.366] Starting localClient module=abci-client connection=mempool impl=localClient +I[10-04|13:54:27.367] Starting localClient module=abci-client connection=consensus impl=localClient +``` Then Tendermint Core and the application perform a handshake. - I[10-04|13:54:27.367] ABCI Handshake module=consensus appHeight=90 appHash=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD - I[10-04|13:54:27.368] ABCI Replay Blocks module=consensus appHeight=90 storeHeight=90 stateHeight=90 - I[10-04|13:54:27.368] Completed ABCI Handshake - Tendermint and App are synced module=consensus appHeight=90 appHash=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD +``` +I[10-04|13:54:27.367] ABCI Handshake module=consensus appHeight=90 appHash=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD +I[10-04|13:54:27.368] ABCI Replay Blocks module=consensus appHeight=90 storeHeight=90 stateHeight=90 +I[10-04|13:54:27.368] Completed ABCI Handshake - Tendermint and App are synced module=consensus appHeight=90 appHash=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD +``` After that, we start a few more things like the event switch, reactors, and perform UPNP discover in order to detect the IP address. - I[10-04|13:54:27.374] Starting EventSwitch module=types impl=EventSwitch - I[10-04|13:54:27.375] This node is a validator module=consensus - I[10-04|13:54:27.379] Starting Node module=main impl=Node - I[10-04|13:54:27.381] Local listener module=p2p ip=:: port=26656 - I[10-04|13:54:27.382] Getting UPNP external address module=p2p - I[10-04|13:54:30.386] Could not perform UPNP discover module=p2p err="write udp4 0.0.0.0:38238->239.255.255.250:1900: i/o timeout" - I[10-04|13:54:30.386] Starting DefaultListener module=p2p impl=Listener(@10.0.2.15:26656) - I[10-04|13:54:30.387] Starting P2P Switch module=p2p impl="P2P Switch" - I[10-04|13:54:30.387] Starting MempoolReactor module=mempool impl=MempoolReactor - I[10-04|13:54:30.387] Starting BlockchainReactor module=blockchain impl=BlockchainReactor - I[10-04|13:54:30.387] Starting ConsensusReactor module=consensus impl=ConsensusReactor - I[10-04|13:54:30.387] ConsensusReactor module=consensus fastSync=false - I[10-04|13:54:30.387] Starting ConsensusState module=consensus impl=ConsensusState - I[10-04|13:54:30.387] Starting WAL module=consensus wal=/home/vagrant/.tendermint/data/cs.wal/wal impl=WAL - I[10-04|13:54:30.388] Starting TimeoutTicker module=consensus impl=TimeoutTicker +``` +I[10-04|13:54:27.374] Starting EventSwitch module=types impl=EventSwitch +I[10-04|13:54:27.375] This node is a validator module=consensus +I[10-04|13:54:27.379] Starting Node module=main impl=Node +I[10-04|13:54:27.381] Local listener module=p2p ip=:: port=26656 +I[10-04|13:54:27.382] Getting UPNP external address module=p2p +I[10-04|13:54:30.386] Could not perform UPNP discover module=p2p err="write udp4 0.0.0.0:38238->239.255.255.250:1900: i/o timeout" +I[10-04|13:54:30.386] Starting DefaultListener module=p2p impl=Listener(@10.0.2.15:26656) +I[10-04|13:54:30.387] Starting P2P Switch module=p2p impl="P2P Switch" +I[10-04|13:54:30.387] Starting MempoolReactor module=mempool impl=MempoolReactor +I[10-04|13:54:30.387] Starting BlockchainReactor module=blockchain impl=BlockchainReactor +I[10-04|13:54:30.387] Starting ConsensusReactor module=consensus impl=ConsensusReactor +I[10-04|13:54:30.387] ConsensusReactor module=consensus fastSync=false +I[10-04|13:54:30.387] Starting ConsensusState module=consensus impl=ConsensusState +I[10-04|13:54:30.387] Starting WAL module=consensus wal=/home/vagrant/.tendermint/data/cs.wal/wal impl=WAL +I[10-04|13:54:30.388] Starting TimeoutTicker module=consensus impl=TimeoutTicker +``` Notice the second row where Tendermint Core reports that "This node is a validator". It also could be just an observer (regular node). Next we replay all the messages from the WAL. - I[10-04|13:54:30.390] Catchup by replaying consensus messages module=consensus height=91 - I[10-04|13:54:30.390] Replay: New Step module=consensus height=91 round=0 step=RoundStepNewHeight - I[10-04|13:54:30.390] Replay: Done module=consensus +``` +I[10-04|13:54:30.390] Catchup by replaying consensus messages module=consensus height=91 +I[10-04|13:54:30.390] Replay: New Step module=consensus height=91 round=0 step=RoundStepNewHeight +I[10-04|13:54:30.390] Replay: Done module=consensus +``` "Started node" message signals that everything is ready for work. - I[10-04|13:54:30.391] Starting RPC HTTP server on tcp socket 0.0.0.0:26657 module=rpc-server - I[10-04|13:54:30.392] Started node module=main nodeInfo="NodeInfo{id: DF22D7C92C91082324A1312F092AA1DA197FA598DBBFB6526E, moniker: anonymous, network: test-chain-3MNw2N [remote , listen 10.0.2.15:26656], version: 0.11.0-10f361fc ([wire_version=0.6.2 p2p_version=0.5.0 consensus_version=v1/0.2.2 rpc_version=0.7.0/3 tx_index=on rpc_addr=tcp://0.0.0.0:26657])}" +``` +I[10-04|13:54:30.391] Starting RPC HTTP server on tcp socket 0.0.0.0:26657 module=rpc-server +I[10-04|13:54:30.392] Started node module=main nodeInfo="NodeInfo{id: DF22D7C92C91082324A1312F092AA1DA197FA598DBBFB6526E, moniker: anonymous, network: test-chain-3MNw2N [remote , listen 10.0.2.15:26656], version: 0.11.0-10f361fc ([wire_version=0.6.2 p2p_version=0.5.0 consensus_version=v1/0.2.2 rpc_version=0.7.0/3 tx_index=on rpc_addr=tcp://0.0.0.0:26657])}" +``` Next follows a standard block creation cycle, where we enter a new round, propose a block, receive more than 2/3 of prevotes, then @@ -56,75 +66,77 @@ please refer to [Consensus Overview](./introduction.md#consensus-overview) or [Byzantine Consensus Algorithm](./spec/consensus). - I[10-04|13:54:30.393] enterNewRound(91/0). Current: 91/0/RoundStepNewHeight module=consensus - I[10-04|13:54:30.393] enterPropose(91/0). Current: 91/0/RoundStepNewRound module=consensus - I[10-04|13:54:30.393] enterPropose: Our turn to propose module=consensus proposer=125B0E3C5512F5C2B0E1109E31885C4511570C42 privValidator="PrivValidator{125B0E3C5512F5C2B0E1109E31885C4511570C42 LH:90, LR:0, LS:3}" - I[10-04|13:54:30.394] Signed proposal module=consensus height=91 round=0 proposal="Proposal{91/0 1:21B79872514F (-1,:0:000000000000) {/10EDEDD7C84E.../}}" - I[10-04|13:54:30.397] Received complete proposal block module=consensus height=91 hash=F671D562C7B9242900A286E1882EE64E5556FE9E - I[10-04|13:54:30.397] enterPrevote(91/0). Current: 91/0/RoundStepPropose module=consensus - I[10-04|13:54:30.397] enterPrevote: ProposalBlock is valid module=consensus height=91 round=0 - I[10-04|13:54:30.398] Signed and pushed vote module=consensus height=91 round=0 vote="Vote{0:125B0E3C5512 91/00/1(Prevote) F671D562C7B9 {/89047FFC21D8.../}}" err=null - I[10-04|13:54:30.401] Added to prevote module=consensus vote="Vote{0:125B0E3C5512 91/00/1(Prevote) F671D562C7B9 {/89047FFC21D8.../}}" prevotes="VoteSet{H:91 R:0 T:1 +2/3:F671D562C7B9242900A286E1882EE64E5556FE9E:1:21B79872514F BA{1:X} map[]}" - I[10-04|13:54:30.401] enterPrecommit(91/0). Current: 91/0/RoundStepPrevote module=consensus - I[10-04|13:54:30.401] enterPrecommit: +2/3 prevoted proposal block. Locking module=consensus hash=F671D562C7B9242900A286E1882EE64E5556FE9E - I[10-04|13:54:30.402] Signed and pushed vote module=consensus height=91 round=0 vote="Vote{0:125B0E3C5512 91/00/2(Precommit) F671D562C7B9 {/80533478E41A.../}}" err=null - I[10-04|13:54:30.404] Added to precommit module=consensus vote="Vote{0:125B0E3C5512 91/00/2(Precommit) F671D562C7B9 {/80533478E41A.../}}" precommits="VoteSet{H:91 R:0 T:2 +2/3:F671D562C7B9242900A286E1882EE64E5556FE9E:1:21B79872514F BA{1:X} map[]}" - I[10-04|13:54:30.404] enterCommit(91/0). Current: 91/0/RoundStepPrecommit module=consensus - I[10-04|13:54:30.405] Finalizing commit of block with 0 txs module=consensus height=91 hash=F671D562C7B9242900A286E1882EE64E5556FE9E root=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD - I[10-04|13:54:30.405] Block{ - Header{ - ChainID: test-chain-3MNw2N - Height: 91 - Time: 2017-10-04 13:54:30.393 +0000 UTC - NumTxs: 0 - LastBlockID: F15AB8BEF9A6AAB07E457A6E16BC410546AA4DC6:1:D505DA273544 - LastCommit: 56FEF2EFDB8B37E9C6E6D635749DF3169D5F005D - Data: - Validators: CE25FBFF2E10C0D51AA1A07C064A96931BC8B297 - App: E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD - }#F671D562C7B9242900A286E1882EE64E5556FE9E - Data{ - - }# - Commit{ - BlockID: F15AB8BEF9A6AAB07E457A6E16BC410546AA4DC6:1:D505DA273544 - Precommits: Vote{0:125B0E3C5512 90/00/2(Precommit) F15AB8BEF9A6 {/FE98E2B956F0.../}} - }#56FEF2EFDB8B37E9C6E6D635749DF3169D5F005D - }#F671D562C7B9242900A286E1882EE64E5556FE9E module=consensus - I[10-04|13:54:30.408] Executed block module=state height=91 validTxs=0 invalidTxs=0 - I[10-04|13:54:30.410] Committed state module=state height=91 txs=0 hash=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD - I[10-04|13:54:30.410] Recheck txs module=mempool numtxs=0 height=91 +``` +I[10-04|13:54:30.393] enterNewRound(91/0). Current: 91/0/RoundStepNewHeight module=consensus +I[10-04|13:54:30.393] enterPropose(91/0). Current: 91/0/RoundStepNewRound module=consensus +I[10-04|13:54:30.393] enterPropose: Our turn to propose module=consensus proposer=125B0E3C5512F5C2B0E1109E31885C4511570C42 privValidator="PrivValidator{125B0E3C5512F5C2B0E1109E31885C4511570C42 LH:90, LR:0, LS:3}" +I[10-04|13:54:30.394] Signed proposal module=consensus height=91 round=0 proposal="Proposal{91/0 1:21B79872514F (-1,:0:000000000000) {/10EDEDD7C84E.../}}" +I[10-04|13:54:30.397] Received complete proposal block module=consensus height=91 hash=F671D562C7B9242900A286E1882EE64E5556FE9E +I[10-04|13:54:30.397] enterPrevote(91/0). Current: 91/0/RoundStepPropose module=consensus +I[10-04|13:54:30.397] enterPrevote: ProposalBlock is valid module=consensus height=91 round=0 +I[10-04|13:54:30.398] Signed and pushed vote module=consensus height=91 round=0 vote="Vote{0:125B0E3C5512 91/00/1(Prevote) F671D562C7B9 {/89047FFC21D8.../}}" err=null +I[10-04|13:54:30.401] Added to prevote module=consensus vote="Vote{0:125B0E3C5512 91/00/1(Prevote) F671D562C7B9 {/89047FFC21D8.../}}" prevotes="VoteSet{H:91 R:0 T:1 +2/3:F671D562C7B9242900A286E1882EE64E5556FE9E:1:21B79872514F BA{1:X} map[]}" +I[10-04|13:54:30.401] enterPrecommit(91/0). Current: 91/0/RoundStepPrevote module=consensus +I[10-04|13:54:30.401] enterPrecommit: +2/3 prevoted proposal block. Locking module=consensus hash=F671D562C7B9242900A286E1882EE64E5556FE9E +I[10-04|13:54:30.402] Signed and pushed vote module=consensus height=91 round=0 vote="Vote{0:125B0E3C5512 91/00/2(Precommit) F671D562C7B9 {/80533478E41A.../}}" err=null +I[10-04|13:54:30.404] Added to precommit module=consensus vote="Vote{0:125B0E3C5512 91/00/2(Precommit) F671D562C7B9 {/80533478E41A.../}}" precommits="VoteSet{H:91 R:0 T:2 +2/3:F671D562C7B9242900A286E1882EE64E5556FE9E:1:21B79872514F BA{1:X} map[]}" +I[10-04|13:54:30.404] enterCommit(91/0). Current: 91/0/RoundStepPrecommit module=consensus +I[10-04|13:54:30.405] Finalizing commit of block with 0 txs module=consensus height=91 hash=F671D562C7B9242900A286E1882EE64E5556FE9E root=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD +I[10-04|13:54:30.405] Block{ + Header{ + ChainID: test-chain-3MNw2N + Height: 91 + Time: 2017-10-04 13:54:30.393 +0000 UTC + NumTxs: 0 + LastBlockID: F15AB8BEF9A6AAB07E457A6E16BC410546AA4DC6:1:D505DA273544 + LastCommit: 56FEF2EFDB8B37E9C6E6D635749DF3169D5F005D + Data: + Validators: CE25FBFF2E10C0D51AA1A07C064A96931BC8B297 + App: E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD + }#F671D562C7B9242900A286E1882EE64E5556FE9E + Data{ + + }# + Commit{ + BlockID: F15AB8BEF9A6AAB07E457A6E16BC410546AA4DC6:1:D505DA273544 + Precommits: Vote{0:125B0E3C5512 90/00/2(Precommit) F15AB8BEF9A6 {/FE98E2B956F0.../}} + }#56FEF2EFDB8B37E9C6E6D635749DF3169D5F005D +}#F671D562C7B9242900A286E1882EE64E5556FE9E module=consensus +I[10-04|13:54:30.408] Executed block module=state height=91 validTxs=0 invalidTxs=0 +I[10-04|13:54:30.410] Committed state module=state height=91 txs=0 hash=E0FBAFBF6FCED8B9786DDFEB1A0D4FA2501BADAD +I[10-04|13:54:30.410] Recheck txs module=mempool numtxs=0 height=91 +``` ## List of modules Here is the list of modules you may encounter in Tendermint's log and a little overview what they do. -- `abci-client` As mentioned in [Application Development Guide](./app-development.md), Tendermint acts as an ABCI - client with respect to the application and maintains 3 connections: - mempool, consensus and query. The code used by Tendermint Core can - be found [here](https://github.com/tendermint/tendermint/tree/develop/abci/client). -- `blockchain` Provides storage, pool (a group of peers), and reactor - for both storing and exchanging blocks between peers. -- `consensus` The heart of Tendermint core, which is the - implementation of the consensus algorithm. Includes two - "submodules": `wal` (write-ahead logging) for ensuring data - integrity and `replay` to replay blocks and messages on recovery - from a crash. -- `events` Simple event notification system. The list of events can be - found - [here](https://github.com/tendermint/tendermint/blob/master/types/events.go). - You can subscribe to them by calling `subscribe` RPC method. Refer - to [RPC docs](./specification/rpc.md) for additional information. -- `mempool` Mempool module handles all incoming transactions, whenever - they are coming from peers or the application. -- `p2p` Provides an abstraction around peer-to-peer communication. For - more details, please check out the - [README](https://github.com/tendermint/tendermint/blob/master/p2p/README.md). -- `rpc` [Tendermint's RPC](./specification/rpc.md). -- `rpc-server` RPC server. For implementation details, please read the - [README](https://github.com/tendermint/tendermint/blob/master/rpc/lib/README.md). -- `state` Represents the latest state and execution submodule, which - executes blocks against the application. -- `types` A collection of the publicly exposed types and methods to - work with them. +- `abci-client` As mentioned in [Application Development Guide](./app-development.md), Tendermint acts as an ABCI + client with respect to the application and maintains 3 connections: + mempool, consensus and query. The code used by Tendermint Core can + be found [here](https://github.com/tendermint/tendermint/tree/develop/abci/client). +- `blockchain` Provides storage, pool (a group of peers), and reactor + for both storing and exchanging blocks between peers. +- `consensus` The heart of Tendermint core, which is the + implementation of the consensus algorithm. Includes two + "submodules": `wal` (write-ahead logging) for ensuring data + integrity and `replay` to replay blocks and messages on recovery + from a crash. +- `events` Simple event notification system. The list of events can be + found + [here](https://github.com/tendermint/tendermint/blob/master/types/events.go). + You can subscribe to them by calling `subscribe` RPC method. Refer + to [RPC docs](./specification/rpc.md) for additional information. +- `mempool` Mempool module handles all incoming transactions, whenever + they are coming from peers or the application. +- `p2p` Provides an abstraction around peer-to-peer communication. For + more details, please check out the + [README](https://github.com/tendermint/tendermint/blob/master/p2p/README.md). +- `rpc` [Tendermint's RPC](./specification/rpc.md). +- `rpc-server` RPC server. For implementation details, please read the + [README](https://github.com/tendermint/tendermint/blob/master/rpc/lib/README.md). +- `state` Represents the latest state and execution submodule, which + executes blocks against the application. +- `types` A collection of the publicly exposed types and methods to + work with them. diff --git a/docs/indexing-transactions.md b/docs/indexing-transactions.md index 93a61fe6b..3bca10959 100644 --- a/docs/indexing-transactions.md +++ b/docs/indexing-transactions.md @@ -5,27 +5,29 @@ to their results. Let's take a look at the `[tx_index]` config section: - ##### transactions indexer configuration options ##### - [tx_index] - - # What indexer to use for transactions - # - # Options: - # 1) "null" (default) - # 2) "kv" - the simplest possible indexer, backed by key-value storage (defaults to levelDB; see DBBackend). - indexer = "kv" - - # Comma-separated list of tags to index (by default the only tag is tx hash) - # - # It's recommended to index only a subset of tags due to possible memory - # bloat. This is, of course, depends on the indexer's DB and the volume of - # transactions. - index_tags = "" - - # When set to true, tells indexer to index all tags. Note this may be not - # desirable (see the comment above). IndexTags has a precedence over - # IndexAllTags (i.e. when given both, IndexTags will be indexed). - index_all_tags = false +``` +##### transactions indexer configuration options ##### +[tx_index] + +# What indexer to use for transactions +# +# Options: +# 1) "null" (default) +# 2) "kv" - the simplest possible indexer, backed by key-value storage (defaults to levelDB; see DBBackend). +indexer = "kv" + +# Comma-separated list of tags to index (by default the only tag is tx hash) +# +# It's recommended to index only a subset of tags due to possible memory +# bloat. This is, of course, depends on the indexer's DB and the volume of +# transactions. +index_tags = "" + +# When set to true, tells indexer to index all tags. Note this may be not +# desirable (see the comment above). IndexTags has a precedence over +# IndexAllTags (i.e. when given both, IndexTags will be indexed). +index_all_tags = false +``` By default, Tendermint will index all transactions by their respective hashes using an embedded simple indexer. Note, we are planning to add @@ -39,15 +41,17 @@ pairs of UTF-8 encoded strings (e.g. "account.owner": "Bob", "balance": Example: - func (app *KVStoreApplication) DeliverTx(tx []byte) types.Result { - ... - tags := []cmn.KVPair{ - {[]byte("account.name"), []byte("igor")}, - {[]byte("account.address"), []byte("0xdeadbeef")}, - {[]byte("tx.amount"), []byte("7")}, - } - return types.ResponseDeliverTx{Code: code.CodeTypeOK, Tags: tags} +``` +func (app *KVStoreApplication) DeliverTx(tx []byte) types.Result { + ... + tags := []cmn.KVPair{ + {[]byte("account.name"), []byte("igor")}, + {[]byte("account.address"), []byte("0xdeadbeef")}, + {[]byte("tx.amount"), []byte("7")}, } + return types.ResponseDeliverTx{Code: code.CodeTypeOK, Tags: tags} +} +``` If you want Tendermint to only index transactions by "account.name" tag, in the config set `tx_index.index_tags="account.name"`. If you to index @@ -55,9 +59,9 @@ all tags, set `index_all_tags=true` Note, there are a few predefined tags: -- `tm.event` (event type) -- `tx.hash` (transaction's hash) -- `tx.height` (height of the block transaction was committed in) +- `tm.event` (event type) +- `tx.hash` (transaction's hash) +- `tx.height` (height of the block transaction was committed in) Tendermint will throw a warning if you try to use any of the above keys. @@ -66,7 +70,9 @@ Tendermint will throw a warning if you try to use any of the above keys. You can query the transaction results by calling `/tx_search` RPC endpoint: - curl "localhost:26657/tx_search?query=\"account.name='igor'\"&prove=true" +``` +curl "localhost:26657/tx_search?query=\"account.name='igor'\"&prove=true" +``` Check out [API docs](https://tendermint.github.io/slate/?shell#txsearch) for more information on query syntax and other options. @@ -76,14 +82,16 @@ for more information on query syntax and other options. Clients can subscribe to transactions with the given tags via Websocket by providing a query to `/subscribe` RPC endpoint. - { - "jsonrpc": "2.0", - "method": "subscribe", - "id": "0", - "params": { - "query": "account.name='igor'" - } +``` +{ + "jsonrpc": "2.0", + "method": "subscribe", + "id": "0", + "params": { + "query": "account.name='igor'" } +} +``` Check out [API docs](https://tendermint.github.io/slate/#subscribe) for more information on query syntax and other options. diff --git a/docs/install.md b/docs/install.md index ff101715b..d02691102 100644 --- a/docs/install.md +++ b/docs/install.md @@ -57,7 +57,7 @@ cd $GOPATH/src/github.com/tendermint/tendermint make install ``` -To upgrade, run +To upgrade, run ``` cd $GOPATH/src/github.com/tendermint/tendermint diff --git a/docs/introduction.md b/docs/introduction.md index 4503e195e..d43fa9b2d 100644 --- a/docs/introduction.md +++ b/docs/introduction.md @@ -61,13 +61,14 @@ providing basic services to distributed systems, such as dynamic configuration, service discovery, locking, leader-election, and so on. Tendermint is in essence similar software, but with two key differences: + - It is Byzantine Fault Tolerant, meaning it can only tolerate up to a -1/3 of failures, but those failures can include arbitrary behaviour - -including hacking and malicious attacks. - It does not specify a -particular application, like a fancy key-value store. Instead, it -focuses on arbitrary state machine replication, so developers can build -the application logic that's right for them, from key-value store to -cryptocurrency to e-voting platform and beyond. + 1/3 of failures, but those failures can include arbitrary behaviour - + including hacking and malicious attacks. - It does not specify a + particular application, like a fancy key-value store. Instead, it + focuses on arbitrary state machine replication, so developers can build + the application logic that's right for them, from key-value store to + cryptocurrency to e-voting platform and beyond. The layout of this Tendermint website content is also ripped directly and without shame from [consul.io](https://www.consul.io/) and the other @@ -167,16 +168,16 @@ maintains a fully audited Unspent Transaction Output (UTXO) database. If one wanted to create a Bitcoin-like system on top of ABCI, Tendermint Core would be responsible for -- Sharing blocks and transactions between nodes -- Establishing a canonical/immutable order of transactions - (the blockchain) +- Sharing blocks and transactions between nodes +- Establishing a canonical/immutable order of transactions + (the blockchain) The application will be responsible for -- Maintaining the UTXO database -- Validating cryptographic signatures of transactions -- Preventing transactions from spending non-existent transactions -- Allowing clients to query the UTXO database. +- Maintaining the UTXO database +- Validating cryptographic signatures of transactions +- Preventing transactions from spending non-existent transactions +- Allowing clients to query the UTXO database. Tendermint is able to decompose the blockchain design by offering a very simple API (ie. the ABCI) between the application process and consensus @@ -242,14 +243,14 @@ Java, C++, Python, or Go. Game programmers and blockchain developers are already familiar with creating deterministic programs by avoiding sources of non-determinism such as: -- random number generators (without deterministic seeding) -- race conditions on threads (or avoiding threads altogether) -- the system clock -- uninitialized memory (in unsafe programming languages like C - or C++) -- [floating point - arithmetic](http://gafferongames.com/networking-for-game-programmers/floating-point-determinism/) -- language features that are random (e.g. map iteration in Go) +- random number generators (without deterministic seeding) +- race conditions on threads (or avoiding threads altogether) +- the system clock +- uninitialized memory (in unsafe programming languages like C + or C++) +- [floating point + arithmetic](http://gafferongames.com/networking-for-game-programmers/floating-point-determinism/) +- language features that are random (e.g. map iteration in Go) While programmers can avoid non-determinism by being careful, it is also possible to create a special linter or static analyzer for each language @@ -298,8 +299,8 @@ introduces a few **locking** rules which modulate which paths can be followed in the flow diagram. Once a validator precommits a block, it is locked on that block. Then, -1) it must prevote for the block it is locked on -2) it can only unlock, and precommit for a new block, if there is a +1. it must prevote for the block it is locked on +2. it can only unlock, and precommit for a new block, if there is a polka for that block in a later round ## Stake diff --git a/docs/package.json b/docs/package.json new file mode 100644 index 000000000..c76bb37c4 --- /dev/null +++ b/docs/package.json @@ -0,0 +1,37 @@ +{ + "dependencies": { + "prettier": "^1.13.7", + "remark-cli": "^5.0.0", + "remark-lint-no-dead-urls": "^0.3.0", + "textlint": "^10.2.1" + }, + "name": "tendermint", + "description": "Tendermint Core Documentation", + "version": "0.0.1", + "main": "README.md", + "devDependencies": {}, + "scripts": { + "lint:json": "prettier \"**/*.json\" --write", + "lint:md": "prettier \"**/*.md\" --write && remark . && textlint \"md/**\"", + "lint": "yarn lint:json && yarn lint:md" + }, + "repository": { + "type": "git", + "url": "git+https://github.com/tendermint/tendermint.git" + }, + "keywords": [ + "tendermint", + "blockchain" + ], + "author": "Tendermint", + "license": "ISC", + "bugs": { + "url": "https://github.com/tendermint/tendermint/issues" + }, + "homepage": "https://tendermint.com/docs/", + "remarkConfig": { + "plugins": [ + "remark-lint-no-dead-urls" + ] + } +} diff --git a/docs/running-in-production.md b/docs/running-in-production.md index 225a97853..1f87f9114 100644 --- a/docs/running-in-production.md +++ b/docs/running-in-production.md @@ -49,21 +49,25 @@ second TODO is to query the /status RPC endpoint. It provides the necessary info: whenever the node is syncing or not, what height it is on, etc. - $ curl http(s)://{ip}:{rpcPort}/status +``` +curl http(s)://{ip}:{rpcPort}/status +``` `dump_consensus_state` will give you a detailed overview of the consensus state (proposer, lastest validators, peers states). From it, you should be able to figure out why, for example, the network had halted. - $ curl http(s)://{ip}:{rpcPort}/dump_consensus_state +``` +curl http(s)://{ip}:{rpcPort}/dump_consensus_state +``` There is a reduced version of this endpoint - `consensus_state`, which returns just the votes seen at the current height. -- [Github Issues](https://github.com/tendermint/tendermint/issues) -- [StackOverflow - questions](https://stackoverflow.com/questions/tagged/tendermint) +- [Github Issues](https://github.com/tendermint/tendermint/issues) +- [StackOverflow + questions](https://stackoverflow.com/questions/tagged/tendermint) ## Monitoring Tendermint @@ -107,18 +111,18 @@ programs](https://golang.org/pkg/os/signal/#hdr-Default_behavior_of_signals_in_G While actual specs vary depending on the load and validators count, minimal requirements are: -- 1GB RAM -- 25GB of disk space -- 1.4 GHz CPU +- 1GB RAM +- 25GB of disk space +- 1.4 GHz CPU SSD disks are preferable for applications with high transaction throughput. Recommended: -- 2GB RAM -- 100GB SSD -- x64 2.0 GHz 2v CPU +- 2GB RAM +- 100GB SSD +- x64 2.0 GHz 2v CPU While for now, Tendermint stores all the history and it may require significant disk space over time, we are planning to implement state @@ -145,21 +149,23 @@ Cosmos network. ## Configuration parameters -- `p2p.flush_throttle_timeout` `p2p.max_packet_msg_payload_size` - `p2p.send_rate` `p2p.recv_rate` +- `p2p.flush_throttle_timeout` `p2p.max_packet_msg_payload_size` + `p2p.send_rate` `p2p.recv_rate` If you are going to use Tendermint in a private domain and you have a private high-speed network among your peers, it makes sense to lower flush throttle timeout and increase other params. - [p2p] +``` +[p2p] - send_rate=20000000 # 2MB/s - recv_rate=20000000 # 2MB/s - flush_throttle_timeout=10 - max_packet_msg_payload_size=10240 # 10KB +send_rate=20000000 # 2MB/s +recv_rate=20000000 # 2MB/s +flush_throttle_timeout=10 +max_packet_msg_payload_size=10240 # 10KB +``` -- `mempool.recheck` +- `mempool.recheck` After every block, Tendermint rechecks every transaction left in the mempool to see if transactions committed in that block affected the @@ -167,13 +173,13 @@ application state, so some of the transactions left may become invalid. If that does not apply to your application, you can disable it by setting `mempool.recheck=false`. -- `mempool.broadcast` +- `mempool.broadcast` Setting this to false will stop the mempool from relaying transactions to other peers until they are included in a block. It means only the peer you send the tx to will see it until it is included in a block. -- `consensus.skip_timeout_commit` +- `consensus.skip_timeout_commit` We want `skip_timeout_commit=false` when there is economics on the line because proposers should wait to hear for more votes. But if you don't @@ -182,22 +188,22 @@ be kept false by default for public deployments (e.g. [Cosmos Hub](https://cosmos.network/intro/hub)) while for enterprise applications, setting it to true is not a problem. -- `consensus.peer_gossip_sleep_duration` +- `consensus.peer_gossip_sleep_duration` You can try to reduce the time your node sleeps before checking if theres something to send its peers. -- `consensus.timeout_commit` +- `consensus.timeout_commit` You can also try lowering `timeout_commit` (time we sleep before proposing the next block). -- `consensus.max_block_size_txs` +- `consensus.max_block_size_txs` By default, the maximum number of transactions per a block is 10_000. Feel free to change it to suit your needs. -- `p2p.addr_book_strict` +- `p2p.addr_book_strict` By default, Tendermint checks whenever a peer's address is routable before saving it to the address book. The address is considered as routable if the IP diff --git a/docs/specification/configuration.md b/docs/specification/configuration.md index 214757b9f..e298dfd8f 100644 --- a/docs/specification/configuration.md +++ b/docs/specification/configuration.md @@ -2,8 +2,7 @@ Tendermint Core can be configured via a TOML file in `$TMHOME/config/config.toml`. Some of these parameters can be overridden by -command-line flags. For most users, the options in the `##### main -base configuration options #####` are intended to be modified while +command-line flags. For most users, the options in the `##### main base configuration options #####` are intended to be modified while config options further below are intended for advance power users. ## Options diff --git a/docs/subscribing-to-events-via-websocket.md b/docs/subscribing-to-events-via-websocket.md index 43d3f7767..9e7c642a0 100644 --- a/docs/subscribing-to-events-via-websocket.md +++ b/docs/subscribing-to-events-via-websocket.md @@ -9,14 +9,16 @@ for third-party applications (for analysys) or inspecting state. You can subscribe to any of the events above by calling `subscribe` RPC method via Websocket. - { - "jsonrpc": "2.0", - "method": "subscribe", - "id": "0", - "params": { - "query": "tm.event='NewBlock'" - } +``` +{ + "jsonrpc": "2.0", + "method": "subscribe", + "id": "0", + "params": { + "query": "tm.event='NewBlock'" } +} +``` Check out [API docs](https://tendermint.github.io/slate/#subscribe) for more information on query syntax and other options. diff --git a/docs/terraform-and-ansible.md b/docs/terraform-and-ansible.md index 55c38cef7..5a4b9c53b 100644 --- a/docs/terraform-and-ansible.md +++ b/docs/terraform-and-ansible.md @@ -12,17 +12,17 @@ script](https://github.com/tendermint/tendermint/blob/develop/networks/remote/in that can be run on a fresh DO droplet and will automatically spin up a 4 node testnet. The script more or less does everything described below. -- Install [Terraform](https://www.terraform.io/downloads.html) and - [Ansible](http://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html) - on a Linux machine. -- Create a [DigitalOcean API - token](https://cloud.digitalocean.com/settings/api/tokens) with read - and write capability. -- Install the python dopy package (`pip install dopy`) -- Create SSH keys (`ssh-keygen`) -- Set environment variables: - -``` +- Install [Terraform](https://www.terraform.io/downloads.html) and + [Ansible](http://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html) + on a Linux machine. +- Create a [DigitalOcean API + token](https://cloud.digitalocean.com/settings/api/tokens) with read + and write capability. +- Install the python dopy package (`pip install dopy`) +- Create SSH keys (`ssh-keygen`) +- Set environment variables: + +``` export DO_API_TOKEN="abcdef01234567890abcdef01234567890" export SSH_KEY_FILE="$HOME/.ssh/id_rsa.pub" ``` @@ -44,6 +44,7 @@ then: terraform init terraform apply -var DO_API_TOKEN="$DO_API_TOKEN" -var SSH_KEY_FILE="$SSH_KEY_FILE" ``` + and you will get a list of IP addresses that belong to your droplets. With the droplets created and running, let's setup Ansible. @@ -154,7 +155,7 @@ page](https://app.logz.io/#/dashboard/data-sources/Filebeat), then: ``` yum install systemd-devel || echo "This will only work on RHEL-based systems." apt-get install libsystemd-dev || echo "This will only work on Debian-based systems." - + go get github.com/mheese/journalbeat ansible-playbook -i inventory/digital_ocean.py -l sentrynet logzio.yml -e LOGZIO_TOKEN=ABCDEFGHIJKLMNOPQRSTUVWXYZ012345 ``` diff --git a/docs/using-tendermint.md b/docs/using-tendermint.md index 1cd910821..21280b97b 100644 --- a/docs/using-tendermint.md +++ b/docs/using-tendermint.md @@ -16,7 +16,9 @@ this by setting the `TMHOME` environment variable. Initialize the root directory by running: - tendermint init +``` +tendermint init +``` This will create a new private key (`priv_validator.json`), and a genesis file (`genesis.json`) containing the associated public key, in @@ -25,24 +27,30 @@ with one validator. For more elaborate initialization, see the tesnet command: - tendermint testnet --help +``` +tendermint testnet --help +``` ## Run To run a Tendermint node, use - tendermint node +``` +tendermint node +``` By default, Tendermint will try to connect to an ABCI application on [127.0.0.1:26658](127.0.0.1:26658). If you have the `kvstore` ABCI app installed, run it in another window. If you don't, kill Tendermint and run an in-process version of the `kvstore` app: - tendermint node --proxy_app=kvstore +``` +tendermint node --proxy_app=kvstore +``` After a few seconds you should see blocks start streaming in. Note that blocks are produced regularly, even if there are no transactions. See -*No Empty Blocks*, below, to modify this setting. +_No Empty Blocks_, below, to modify this setting. Tendermint supports in-process versions of the `counter`, `kvstore` and `nil` apps that ship as examples with `abci-cli`. It's easy to compile @@ -51,22 +59,30 @@ app is not written in Go, simply run it in another process, and use the `--proxy_app` flag to specify the address of the socket it is listening on, for instance: - tendermint node --proxy_app=/var/run/abci.sock +``` +tendermint node --proxy_app=/var/run/abci.sock +``` ## Transactions To send a transaction, use `curl` to make requests to the Tendermint RPC server, for example: - curl http://localhost:26657/broadcast_tx_commit?tx=\"abcd\" +``` +curl http://localhost:26657/broadcast_tx_commit?tx=\"abcd\" +``` We can see the chain's status at the `/status` end-point: - curl http://localhost:26657/status | json_pp +``` +curl http://localhost:26657/status | json_pp +``` and the `latest_app_hash` in particular: - curl http://localhost:26657/status | json_pp | grep latest_app_hash +``` +curl http://localhost:26657/status | json_pp | grep latest_app_hash +``` Visit http://localhost:26657> in your browser to see the list of other endpoints. Some take no arguments (like `/status`), while others specify @@ -81,30 +97,40 @@ With `GET`: To send a UTF8 string byte array, quote the value of the tx pramater: - curl 'http://localhost:26657/broadcast_tx_commit?tx="hello"' +``` +curl 'http://localhost:26657/broadcast_tx_commit?tx="hello"' +``` which sends a 5 byte transaction: "h e l l o" \[68 65 6c 6c 6f\]. Note the URL must be wrapped with single quoes, else bash will ignore the double quotes. To avoid the single quotes, escape the double quotes: - curl http://localhost:26657/broadcast_tx_commit?tx=\"hello\" +``` +curl http://localhost:26657/broadcast_tx_commit?tx=\"hello\" +``` Using a special character: - curl 'http://localhost:26657/broadcast_tx_commit?tx="€5"' +``` +curl 'http://localhost:26657/broadcast_tx_commit?tx="€5"' +``` sends a 4 byte transaction: "€5" (UTF8) \[e2 82 ac 35\]. To send as raw hex, omit quotes AND prefix the hex string with `0x`: - curl http://localhost:26657/broadcast_tx_commit?tx=0x01020304 +``` +curl http://localhost:26657/broadcast_tx_commit?tx=0x01020304 +``` which sends a 4 byte transaction: \[01 02 03 04\]. With `POST` (using `json`), the raw hex must be `base64` encoded: - curl --data-binary '{"jsonrpc":"2.0","id":"anything","method":"broadcast_tx_commit","params": {"tx": "AQIDBA=="}}' -H 'content-type:text/plain;' http://localhost:26657 +``` +curl --data-binary '{"jsonrpc":"2.0","id":"anything","method":"broadcast_tx_commit","params": {"tx": "AQIDBA=="}}' -H 'content-type:text/plain;' http://localhost:26657 +``` which sends the same 4 byte transaction: \[01 02 03 04\]. @@ -118,7 +144,9 @@ afford to lose all blockchain data! To reset a blockchain, stop the node, remove the `~/.tendermint/data` directory and run - tendermint unsafe_reset_priv_validator +``` +tendermint unsafe_reset_priv_validator +``` This final step is necessary to reset the `priv_validator.json`, which otherwise prevents you from making conflicting votes in the consensus @@ -150,21 +178,27 @@ To configure Tendermint to not produce empty blocks unless there are transactions or the app hash changes, run Tendermint with this additional flag: - tendermint node --consensus.create_empty_blocks=false +``` +tendermint node --consensus.create_empty_blocks=false +``` or set the configuration via the `config.toml` file: - [consensus] - create_empty_blocks = false +``` +[consensus] +create_empty_blocks = false +``` -Remember: because the default is to *create empty blocks*, avoiding +Remember: because the default is to _create empty blocks_, avoiding empty blocks requires the config option to be set to `false`. The block interval setting allows for a delay (in seconds) between the creation of each new empty block. It is set via the `config.toml`: - [consensus] - create_empty_blocks_interval = 5 +``` +[consensus] +create_empty_blocks_interval = 5 +``` With this setting, empty blocks will be produced every 5s if no block has been produced otherwise, regardless of the value of @@ -181,9 +215,11 @@ eventually included in a block. Since there are multiple phases to processing a transaction, we offer multiple endpoints to broadcast a transaction: - /broadcast_tx_async - /broadcast_tx_sync - /broadcast_tx_commit +``` +/broadcast_tx_async +/broadcast_tx_sync +/broadcast_tx_commit +``` These correspond to no-processing, processing through the mempool, and processing through a block, respectively. That is, `broadcast_tx_async`, @@ -208,38 +244,42 @@ When `tendermint init` is run, both a `genesis.json` and `priv_validator.json` are created in `~/.tendermint/config`. The `genesis.json` might look like: +``` +{ + "validators" : [ { - "validators" : [ - { - "pub_key" : { - "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=", - "type" : "tendermint/PubKeyEd25519" - }, - "power" : 10, - "name" : "" - } - ], - "app_hash" : "", - "chain_id" : "test-chain-rDlYSN", - "genesis_time" : "0001-01-01T00:00:00Z" - } - -And the `priv_validator.json`: - - { - "last_step" : 0, - "last_round" : "0", - "address" : "B788DEDE4F50AD8BC9462DE76741CCAFF87D51E2", "pub_key" : { "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=", "type" : "tendermint/PubKeyEd25519" }, - "last_height" : "0", - "priv_key" : { - "value" : "JPivl82x+LfVkp8i3ztoTjY6c6GJ4pBxQexErOCyhwqHeGT5ATxzpAtPJKnxNx/NyUnD8Ebv3OIYH+kgD4N88Q==", - "type" : "tendermint/PrivKeyEd25519" - } + "power" : 10, + "name" : "" } + ], + "app_hash" : "", + "chain_id" : "test-chain-rDlYSN", + "genesis_time" : "0001-01-01T00:00:00Z" +} +``` + +And the `priv_validator.json`: + +``` +{ + "last_step" : 0, + "last_round" : "0", + "address" : "B788DEDE4F50AD8BC9462DE76741CCAFF87D51E2", + "pub_key" : { + "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=", + "type" : "tendermint/PubKeyEd25519" + }, + "last_height" : "0", + "priv_key" : { + "value" : "JPivl82x+LfVkp8i3ztoTjY6c6GJ4pBxQexErOCyhwqHeGT5ATxzpAtPJKnxNx/NyUnD8Ebv3OIYH+kgD4N88Q==", + "type" : "tendermint/PrivKeyEd25519" + } +} +``` The `priv_validator.json` actually contains a private key, and should thus be kept absolutely secret; for now we work with the plain text. @@ -272,6 +312,7 @@ with the consensus protocol. ### Peers #### Seed + A seed node is a node who relays the addresses of other peers which they know of. These nodes constantly crawl the network to try to get more peers. The addresses which the seed node relays get saved into a local address book. Once @@ -282,6 +323,7 @@ only need them on the first start. The seed node will immediately disconnect from you after sending you some addresses. #### Persistent Peer + Persistent peers are people you want to be constantly connected with. If you disconnect you will try to connect directly back to them as opposed to using another address from the address book. On restarts you will always try to @@ -302,12 +344,16 @@ persistent connections with. For example, - tendermint node --p2p.seeds "f9baeaa15fedf5e1ef7448dd60f46c01f1a9e9c4@1.2.3.4:26656,0491d373a8e0fcf1023aaf18c51d6a1d0d4f31bd@5.6.7.8:26656" +``` +tendermint node --p2p.seeds "f9baeaa15fedf5e1ef7448dd60f46c01f1a9e9c4@1.2.3.4:26656,0491d373a8e0fcf1023aaf18c51d6a1d0d4f31bd@5.6.7.8:26656" +``` Alternatively, you can use the `/dial_seeds` endpoint of the RPC to specify seeds for a running node to connect to: - curl 'localhost:26657/dial_seeds?seeds=\["f9baeaa15fedf5e1ef7448dd60f46c01f1a9e9c4@1.2.3.4:26656","0491d373a8e0fcf1023aaf18c51d6a1d0d4f31bd@5.6.7.8:26656"\]' +``` +curl 'localhost:26657/dial_seeds?seeds=\["f9baeaa15fedf5e1ef7448dd60f46c01f1a9e9c4@1.2.3.4:26656","0491d373a8e0fcf1023aaf18c51d6a1d0d4f31bd@5.6.7.8:26656"\]' +``` Note, with PeX enabled, you should not need seeds after the first start. @@ -318,8 +364,11 @@ maintain a persistent connection with each, you can use the `config.toml` or the `/dial_peers` RPC endpoint to do it without stopping Tendermint core instance. - tendermint node --p2p.persistent_peers "429fcf25974313b95673f58d77eacdd434402665@10.11.12.13:26656,96663a3dd0d7b9d17d4c8211b191af259621c693@10.11.12.14:26656" - curl 'localhost:26657/dial_peers?persistent=true&peers=\["429fcf25974313b95673f58d77eacdd434402665@10.11.12.13:26656","96663a3dd0d7b9d17d4c8211b191af259621c693@10.11.12.14:26656"\]' +``` +tendermint node --p2p.persistent_peers "429fcf25974313b95673f58d77eacdd434402665@10.11.12.13:26656,96663a3dd0d7b9d17d4c8211b191af259621c693@10.11.12.14:26656" + +curl 'localhost:26657/dial_peers?persistent=true&peers=\["429fcf25974313b95673f58d77eacdd434402665@10.11.12.13:26656","96663a3dd0d7b9d17d4c8211b191af259621c693@10.11.12.14:26656"\]' +``` ### Adding a Non-Validator @@ -338,51 +387,57 @@ before starting the network. For instance, we could make a new We can generate a new `priv_validator.json` with the command: - tendermint gen_validator +``` +tendermint gen_validator +``` Now we can update our genesis file. For instance, if the new `priv_validator.json` looks like: +``` +{ + "address" : "5AF49D2A2D4F5AD4C7C8C4CC2FB020131E9C4902", + "pub_key" : { + "value" : "l9X9+fjkeBzDfPGbUM7AMIRE6uJN78zN5+lk5OYotek=", + "type" : "tendermint/PubKeyEd25519" + }, + "priv_key" : { + "value" : "EDJY9W6zlAw+su6ITgTKg2nTZcHAH1NMTW5iwlgmNDuX1f35+OR4HMN88ZtQzsAwhETq4k3vzM3n6WTk5ii16Q==", + "type" : "tendermint/PrivKeyEd25519" + }, + "last_step" : 0, + "last_round" : "0", + "last_height" : "0" +} +``` + +then the new `genesis.json` will be: + +``` +{ + "validators" : [ { - "address" : "5AF49D2A2D4F5AD4C7C8C4CC2FB020131E9C4902", "pub_key" : { - "value" : "l9X9+fjkeBzDfPGbUM7AMIRE6uJN78zN5+lk5OYotek=", + "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=", "type" : "tendermint/PubKeyEd25519" }, - "priv_key" : { - "value" : "EDJY9W6zlAw+su6ITgTKg2nTZcHAH1NMTW5iwlgmNDuX1f35+OR4HMN88ZtQzsAwhETq4k3vzM3n6WTk5ii16Q==", - "type" : "tendermint/PrivKeyEd25519" - }, - "last_step" : 0, - "last_round" : "0", - "last_height" : "0" - } - -then the new `genesis.json` will be: - + "power" : 10, + "name" : "" + }, { - "validators" : [ - { - "pub_key" : { - "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=", - "type" : "tendermint/PubKeyEd25519" - }, - "power" : 10, - "name" : "" - }, - { - "pub_key" : { - "value" : "l9X9+fjkeBzDfPGbUM7AMIRE6uJN78zN5+lk5OYotek=", - "type" : "tendermint/PubKeyEd25519" - }, - "power" : 10, - "name" : "" - } - ], - "app_hash" : "", - "chain_id" : "test-chain-rDlYSN", - "genesis_time" : "0001-01-01T00:00:00Z" + "pub_key" : { + "value" : "l9X9+fjkeBzDfPGbUM7AMIRE6uJN78zN5+lk5OYotek=", + "type" : "tendermint/PubKeyEd25519" + }, + "power" : 10, + "name" : "" } + ], + "app_hash" : "", + "chain_id" : "test-chain-rDlYSN", + "genesis_time" : "0001-01-01T00:00:00Z" +} +``` Update the `genesis.json` in `~/.tendermint/config`. 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