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Read most protocol params from common/params.json

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* Add params package with exported variables generated from
  github.com/ethereum/common/blob/master/params.json
* Use params package variables in applicable places
* Add check for minimum gas limit in validation of block's gas limit
* Remove common/params.json from go-ethereum to avoid
  outdated version of it
This commit is contained in:
Gustav Simonsson
2015-04-02 05:17:15 +02:00
parent 516ec28544
commit c26c8d3a44
15 changed files with 126 additions and 163 deletions
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11
core/block_processor.go
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@ -11,6 +11,7 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
"gopkg.in/fatih/set.v0"
@ -252,7 +253,7 @@ func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (td *big
// an uncle or anything that isn't on the current block chain.
// Validation validates easy over difficult (dagger takes longer time = difficult)
func (sm *BlockProcessor) ValidateHeader(block, parent *types.Header) error {
if len(block.Extra) > 1024 {
if big.NewInt(int64(len(block.Extra))).Cmp(params.MaximumExtraDataSize) == 1 {
return fmt.Errorf("Block extra data too long (%d)", len(block.Extra))
}
@ -261,13 +262,11 @@ func (sm *BlockProcessor) ValidateHeader(block, parent *types.Header) error {
return fmt.Errorf("Difficulty check failed for block %v, %v", block.Difficulty, expd)
}
// TODO: use use minGasLimit and gasLimitBoundDivisor from
// https://github.com/ethereum/common/blob/master/params.json
// block.gasLimit - parent.gasLimit <= parent.gasLimit / 1024
// block.gasLimit - parent.gasLimit <= parent.gasLimit / GasLimitBoundDivisor
a := new(big.Int).Sub(block.GasLimit, parent.GasLimit)
a.Abs(a)
b := new(big.Int).Div(parent.GasLimit, big.NewInt(1024))
if !(a.Cmp(b) < 0) {
b := new(big.Int).Div(parent.GasLimit, params.GasLimitBoundDivisor)
if !(a.Cmp(b) < 0) || (block.GasLimit.Cmp(params.MinGasLimit) == -1) {
return fmt.Errorf("GasLimit check failed for block %v (%v > %v)", block.GasLimit, a, b)
}