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@ -8,9 +8,9 @@ The Tendermint blockchains consists of a short list of basic data types: |
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- `Block` |
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- `Header` |
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- `Vote` |
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- `BlockID` |
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- `Signature` |
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- `Time` |
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- `Vote` |
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- `Evidence` |
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## Block |
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@ -42,29 +42,29 @@ the data in the current block, the previous block, and the results returned by t |
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```go |
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type Header struct { |
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// basic block info |
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ChainID string `json:"chain_id"` |
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Height int64 `json:"height"` |
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Time time.Time `json:"time"` |
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NumTxs int64 `json:"num_txs"` |
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TotalTxs int64 `json:"total_txs"` |
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ChainID string |
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Height int64 |
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Time time.Time |
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NumTxs int64 |
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TotalTxs int64 |
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// prev block info |
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LastBlockID BlockID `json:"last_block_id"` |
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LastBlockID BlockID |
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// hashes of block data |
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LastCommitHash cmn.HexBytes `json:"last_commit_hash"` // commit from validators from the last block |
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DataHash cmn.HexBytes `json:"data_hash"` // transactions |
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LastCommitHash []byte // commit from validators from the last block |
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DataHash []byte // Merkle root of transactions |
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// hashes from the app output from the prev block |
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ValidatorsHash cmn.HexBytes `json:"validators_hash"` // validators for the current block |
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NextValidatorsHash cmn.HexBytes `json:"next_validators_hash"` // validators for the next block |
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ConsensusHash cmn.HexBytes `json:"consensus_hash"` // consensus params for current block |
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AppHash cmn.HexBytes `json:"app_hash"` // state after txs from the previous block |
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LastResultsHash cmn.HexBytes `json:"last_results_hash"` // root hash of all results from the txs from the previous block |
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ValidatorsHash []byte // validators for the current block |
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NextValidatorsHash []byte // validators for the next block |
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ConsensusHash []byte // consensus params for current block |
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AppHash []byte // state after txs from the previous block |
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LastResultsHash []byte // root hash of all results from the txs from the previous block |
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// consensus info |
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EvidenceHash cmn.HexBytes `json:"evidence_hash"` // evidence included in the block |
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ProposerAddress Address `json:"proposer_address"` // original proposer of the block |
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EvidenceHash []byte // evidence included in the block |
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ProposerAddress []byte // original proposer of the block |
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``` |
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Further details on each of these fields is described below. |
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@ -90,6 +90,16 @@ type PartsHeader struct { |
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} |
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``` |
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## Time |
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Tendermint uses the |
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[Google.Protobuf.WellKnownTypes.Timestamp](https://developers.google.com/protocol-buffers/docs/reference/csharp/class/google/protobuf/well-known-types/timestamp) |
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format, which uses two integers, one for Seconds and for Nanoseconds. |
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TODO: clarify exact format and reconcile [this |
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comment](https://github.com/tendermint/tendermint/blob/892b170818cd3be4cd3f919d72dde1ad60c28bbb/types/proto3/block.proto#L43). |
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## Vote |
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A vote is a signed message from a validator for a particular block. |
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@ -97,14 +107,14 @@ The vote includes information about the validator signing it. |
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```go |
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type Vote struct { |
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Timestamp int64 |
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Address []byte |
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Index int |
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Height int64 |
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Round int |
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Type int8 |
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BlockID BlockID |
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Signature Signature |
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ValidatorAddress []byte |
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ValidatorIndex int |
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Height int64 |
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Round int |
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Timestamp Time |
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Type int8 |
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BlockID BlockID |
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Signature []byte |
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} |
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``` |
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@ -114,41 +124,9 @@ a _precommit_ has `vote.Type == 2`. |
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## Signature |
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Tendermint allows for multiple signature schemes to be used by prepending a single type-byte |
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to the signature bytes. Different signatures may also come with fixed or variable lengths. |
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Currently, Tendermint supports Ed25519 and Secp256k1. |
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### ED25519 |
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An ED25519 signature has `Type == 0x1`. It looks like: |
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```go |
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// Implements Signature |
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type Ed25519Signature struct { |
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Type int8 = 0x1 |
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Signature [64]byte |
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} |
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``` |
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where `Signature` is the 64 byte signature. |
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### Secp256k1 |
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A `Secp256k1` signature has `Type == 0x2`. It looks like: |
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```go |
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// Implements Signature |
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type Secp256k1Signature struct { |
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Type int8 = 0x2 |
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Signature []byte |
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} |
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``` |
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where `Signature` is the DER encoded signature, ie: |
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```hex |
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0x30 <length of whole message> <0x02> <length of R> <R> 0x2 <length of S> <S>. |
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``` |
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Signatures in Tendermint are raw bytes representing the underlying signature. |
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The only signature scheme currently supported for Tendermint validators is |
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ED25519. The signature is the raw 64-byte ED25519 signature. |
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## Evidence |
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Ethan Buchman
6 years ago
GitHub