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152 lines
4.5 KiB
152 lines
4.5 KiB
package state
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import (
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"bytes"
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"errors"
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"fmt"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/types"
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)
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//-----------------------------------------------------
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// Validate block
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func validateBlock(evidencePool EvidencePool, state State, block *types.Block) error {
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// Validate internal consistency.
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if err := block.ValidateBasic(); err != nil {
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return err
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}
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// Validate basic info.
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if block.Version.App != state.Version.Consensus.App ||
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block.Version.Block != state.Version.Consensus.Block {
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return fmt.Errorf("wrong Block.Header.Version. Expected %v, got %v",
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state.Version.Consensus,
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block.Version,
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)
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}
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if block.ChainID != state.ChainID {
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return fmt.Errorf("wrong Block.Header.ChainID. Expected %v, got %v",
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state.ChainID,
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block.ChainID,
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)
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}
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if state.LastBlockHeight == 0 && block.Height != state.InitialHeight {
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return fmt.Errorf("wrong Block.Header.Height. Expected %v for initial block, got %v",
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block.Height, state.InitialHeight)
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}
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if state.LastBlockHeight > 0 && block.Height != state.LastBlockHeight+1 {
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return fmt.Errorf("wrong Block.Header.Height. Expected %v, got %v",
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state.LastBlockHeight+1,
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block.Height,
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)
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}
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// Validate prev block info.
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if !block.LastBlockID.Equals(state.LastBlockID) {
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return fmt.Errorf("wrong Block.Header.LastBlockID. Expected %v, got %v",
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state.LastBlockID,
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block.LastBlockID,
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)
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}
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// Validate app info
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if !bytes.Equal(block.AppHash, state.AppHash) {
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return fmt.Errorf("wrong Block.Header.AppHash. Expected %X, got %v",
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state.AppHash,
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block.AppHash,
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)
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}
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hashCP := types.HashConsensusParams(state.ConsensusParams)
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if !bytes.Equal(block.ConsensusHash, hashCP) {
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return fmt.Errorf("wrong Block.Header.ConsensusHash. Expected %X, got %v",
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hashCP,
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block.ConsensusHash,
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)
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}
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if !bytes.Equal(block.LastResultsHash, state.LastResultsHash) {
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return fmt.Errorf("wrong Block.Header.LastResultsHash. Expected %X, got %v",
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state.LastResultsHash,
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block.LastResultsHash,
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)
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}
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if !bytes.Equal(block.ValidatorsHash, state.Validators.Hash()) {
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return fmt.Errorf("wrong Block.Header.ValidatorsHash. Expected %X, got %v",
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state.Validators.Hash(),
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block.ValidatorsHash,
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)
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}
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if !bytes.Equal(block.NextValidatorsHash, state.NextValidators.Hash()) {
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return fmt.Errorf("wrong Block.Header.NextValidatorsHash. Expected %X, got %v",
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state.NextValidators.Hash(),
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block.NextValidatorsHash,
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)
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}
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// Validate block LastCommit.
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if block.Height == state.InitialHeight {
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if len(block.LastCommit.Signatures) != 0 {
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return errors.New("initial block can't have LastCommit signatures")
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}
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} else {
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// LastCommit.Signatures length is checked in VerifyCommit.
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if err := state.LastValidators.VerifyCommit(
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state.ChainID, state.LastBlockID, block.Height-1, block.LastCommit); err != nil {
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return err
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}
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}
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// NOTE: We can't actually verify it's the right proposer because we don't
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// know what round the block was first proposed. So just check that it's
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// a legit address and a known validator.
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if len(block.ProposerAddress) != crypto.AddressSize {
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return fmt.Errorf("expected ProposerAddress size %d, got %d",
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crypto.AddressSize,
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len(block.ProposerAddress),
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)
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}
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if !state.Validators.HasAddress(block.ProposerAddress) {
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return fmt.Errorf("block.Header.ProposerAddress %X is not a validator",
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block.ProposerAddress,
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)
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}
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// Validate block Time
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switch {
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case block.Height > state.InitialHeight:
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if !block.Time.After(state.LastBlockTime) {
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return fmt.Errorf("block time %v not greater than last block time %v",
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block.Time,
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state.LastBlockTime,
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)
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}
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medianTime := MedianTime(block.LastCommit, state.LastValidators)
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if !block.Time.Equal(medianTime) {
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return fmt.Errorf("invalid block time. Expected %v, got %v",
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medianTime,
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block.Time,
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)
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}
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case block.Height == state.InitialHeight:
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genesisTime := state.LastBlockTime
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if !block.Time.Equal(genesisTime) {
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return fmt.Errorf("block time %v is not equal to genesis time %v",
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block.Time,
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genesisTime,
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)
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}
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default:
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return fmt.Errorf("block height %v lower than initial height %v",
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block.Height, state.InitialHeight)
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}
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// Check evidence doesn't exceed the limit. MaxNumEvidence is capped at uint16, so conversion is always safe.
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if max, got := int(state.ConsensusParams.Evidence.MaxNum), len(block.Evidence.Evidence); got > max {
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return types.NewErrEvidenceOverflow(max, got)
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}
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// Validate all evidence.
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return evidencePool.CheckEvidence(block.Evidence.Evidence)
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}
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