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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  outdated version of it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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14
core/chain_manager.go
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@ -12,6 +12,7 @@ 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/rlp"
)
@ -32,18 +33,15 @@ type StateQuery interface {
func CalcDifficulty(block, parent *types.Header) *big.Int {
diff := new(big.Int)
diffBoundDiv := big.NewInt(2048)
min := big.NewInt(131072)
adjust := new(big.Int).Div(parent.Difficulty, diffBoundDiv)
if (block.Time - parent.Time) < 8 {
adjust := new(big.Int).Div(parent.Difficulty, params.DifficultyBoundDivisor)
if big.NewInt(int64(block.Time)-int64(parent.Time)).Cmp(params.DurationLimit) < 0 {
diff.Add(parent.Difficulty, adjust)
} else {
diff.Sub(parent.Difficulty, adjust)
}
if diff.Cmp(min) < 0 {
return min
if diff.Cmp(params.MinimumDifficulty) < 0 {
return params.MinimumDifficulty
}
return diff
@ -76,7 +74,7 @@ func CalcGasLimit(parent, block *types.Block) *big.Int {
result := new(big.Int).Add(previous, curInt)
result.Div(result, big.NewInt(1024))
return common.BigMax(GenesisGasLimit, result)
return common.BigMax(params.GenesisGasLimit, result)
}
type ChainManager struct {