You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
205 lines
6.2 KiB
205 lines
6.2 KiB
Specification
|
|
=============
|
|
|
|
Message Types
|
|
~~~~~~~~~~~~~
|
|
|
|
ABCI requests/responses are defined as simple Protobuf messages in `this
|
|
schema
|
|
file <https://github.com/tendermint/abci/blob/master/types/types.proto>`__.
|
|
TendermintCore sends the requests, and the ABCI application sends the
|
|
responses. Here, we describe the requests and responses as function
|
|
arguments and return values, and make some notes about usage:
|
|
|
|
Echo
|
|
^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Message (string)``: A string to echo back
|
|
|
|
- **Returns**:
|
|
|
|
- ``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.
|
|
|
|
Info
|
|
^^^^
|
|
|
|
- **Returns**:
|
|
|
|
- ``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 the app with Tendermint on crash/restart.
|
|
|
|
SetOption
|
|
^^^^^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Key (string)``: Key to set
|
|
- ``Value (string)``: Value to set for key
|
|
|
|
- **Returns**:
|
|
|
|
- ``Code (uint32)``: Response code
|
|
- ``Log (string)``: Debug or error message
|
|
|
|
- **Usage**: Set application options. E.g. Key="mode", Value="mempool"
|
|
for a mempool connection, or Key="mode", Value="consensus" for a
|
|
consensus connection. Other options are application specific.
|
|
|
|
InitChain
|
|
^^^^^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Validators ([]Validator)``: Initial genesis validators
|
|
- ``AppStateBytes ([]byte)``: Serialized initial application state
|
|
|
|
- **Usage**: Called once upon genesis
|
|
|
|
Query
|
|
^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``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
|
|
|
|
- **Returns**:
|
|
|
|
- ``Code (uint32)``: Response code
|
|
- ``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
|
|
- ``Log (string)``: Debug or error message
|
|
|
|
BeginBlock
|
|
^^^^^^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Hash ([]byte)``: The block's hash. This can be derived from the
|
|
block header.
|
|
- ``Header (struct{})``: The block header
|
|
- ``AbsentValidators ([]int32)``: List of indices of validators not
|
|
included in the LastCommit
|
|
- ``ByzantineValidators ([]Evidence)``: List of evidence of
|
|
validators that acted maliciously
|
|
|
|
- **Usage**: Signals the beginning of a new block. Called prior to any
|
|
DeliverTxs. The header is expected to at least contain the Height.
|
|
The ``AbsentValidators`` and ``ByzantineValidators`` can be used to
|
|
determine rewards and punishments for the validators.
|
|
|
|
CheckTx
|
|
^^^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Data ([]byte)``: The request transaction bytes
|
|
|
|
- **Returns**:
|
|
|
|
- ``Code (uint32)``: Response code
|
|
- ``Data ([]byte)``: Result bytes, if any
|
|
- ``Log (string)``: Debug or error message
|
|
- ``Gas (int64)``: Amount of gas consumed by transaction
|
|
- ``Fee (int64)``: Fee paid by transaction
|
|
|
|
- **Usage**: Validate a mempool transaction, prior to broadcasting or
|
|
proposing. This message should not mutate the main state, but
|
|
application developers may want to keep a separate CheckTx state that
|
|
gets reset upon Commit.
|
|
|
|
CheckTx can happen interspersed with DeliverTx, but they happen on
|
|
different ABCI connections - CheckTx from the mempool connection, and
|
|
DeliverTx from the consensus connection. During Commit, the mempool
|
|
is locked, so you can reset the mempool state to the latest state
|
|
after running all those DeliverTxs, and then the mempool will re-run
|
|
whatever txs it has against that latest mempool state.
|
|
|
|
Transactions are first run through CheckTx before broadcast to peers
|
|
in the mempool layer. You can make CheckTx semi-stateful and clear
|
|
the state upon ``Commit`` or ``BeginBlock``, to allow for dependent
|
|
sequences of transactions in the same block.
|
|
|
|
DeliverTx
|
|
^^^^^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Data ([]byte)``: The request transaction bytes
|
|
|
|
- **Returns**:
|
|
|
|
- ``Code (uint32)``: Response code
|
|
- ``Data ([]byte)``: Result bytes, if any
|
|
- ``Log (string)``: Debug or error message
|
|
- ``Tags ([]*KVPair)``: Optional tags for indexing
|
|
|
|
- **Usage**: Append and run a transaction. If the transaction is valid,
|
|
returns CodeType.OK
|
|
|
|
EndBlock
|
|
^^^^^^^^
|
|
|
|
- **Arguments**:
|
|
|
|
- ``Height (int64)``: The block height that ended
|
|
|
|
- **Returns**:
|
|
|
|
- ``ValidatorUpdates ([]Validator)``: Changes to validator set (set
|
|
voting power to 0 to remove)
|
|
- ``ConsensusParamUpdates (ConsensusParams)``: Changes to
|
|
consensus-critical time/size parameters
|
|
|
|
- **Usage**: Signals the end of a block. Called prior to each Commit
|
|
after all transactions. Validator set is updated with the result.
|
|
|
|
Commit
|
|
^^^^^^
|
|
|
|
- **Returns**:
|
|
|
|
- ``Data ([]byte)``: The Merkle root hash
|
|
- ``Log (string)``: Debug or error message
|
|
|
|
- **Usage**: Return a Merkle root hash of the application state.
|