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Validate block header gas limit 

* Add block header gas limit validation in ValidateBlock function,
  see eq 39 and 45 in yellow paper. Before it was calculated _for_
  the block instead of validated.
* Use the block header gas limit when setting the gas pool instead
  of calculating the value for the block.
This commit is contained in:
Gustav Simonsson 2015-02-25 20:00:32 +01:00
parent fe73023940
commit 260ab73969
1 changed files with 6 additions and 1 deletions
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7
core/block_processor.go
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@ -62,7 +62,7 @@ func NewBlockProcessor(db ethutil.Database, txpool *TxPool, chainManager *ChainM
func (sm *BlockProcessor) TransitionState(statedb *state.StateDB, parent, block *types.Block, transientProcess bool) (receipts types.Receipts, err error) {
coinbase := statedb.GetOrNewStateObject(block.Header().Coinbase)
coinbase.SetGasPool(CalcGasLimit(parent, block))
coinbase.SetGasPool(block.Header().GasLimit)
// Process the transactions on to parent state
receipts, _, _, _, err = sm.ApplyTransactions(coinbase, statedb, block, block.Transactions(), transientProcess)
@ -247,6 +247,11 @@ func (sm *BlockProcessor) ValidateBlock(block, parent *types.Block) error {
return fmt.Errorf("Difficulty check failed for block %v, %v", block.Header().Difficulty, expd)
}
expl := CalcGasLimit(parent, block)
if expl.Cmp(block.Header().GasLimit) != 0 {
return fmt.Errorf("GasLimit check failed for block %v, %v", block.Header().GasLimit, expl)
}
if block.Time() < parent.Time() {
return ValidationError("Block timestamp not after prev block (%v - %v)", block.Header().Time, parent.Header().Time)
}