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core: fixed mining strategy

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This commit is contained in:
obscuren 2015-05-15 12:24:29 +02:00
parent b71091e337
commit f6669db001
2 changed files with 16 additions and 10 deletions
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2
core/chain_makers.go
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@ -98,7 +98,7 @@ func makeChain(bman *BlockProcessor, parent *types.Block, max int, db common.Dat
fmt.Println("process with parent failed", err)
panic(err)
}
block.Td = CalculateTD(block, parent)
block.Td = CalcTD(block, parent)
blocks[i] = block
parent = block
}

24
core/chain_manager.go
View File

@ -48,7 +48,7 @@ func CalcDifficulty(block, parent *types.Header) *big.Int {
return diff
}
func CalculateTD(block, parent *types.Block) *big.Int {
func CalcTD(block, parent *types.Block) *big.Int {
if parent == nil {
return block.Difficulty()
}
@ -59,14 +59,20 @@ func CalculateTD(block, parent *types.Block) *big.Int {
}
func CalcGasLimit(parent *types.Block) *big.Int {
// ((1024-1) * parent.gasLimit + (gasUsed * 6 / 5)) / 1024
previous := new(big.Int).Mul(big.NewInt(1024-1), parent.GasLimit())
current := new(big.Rat).Mul(new(big.Rat).SetInt(parent.GasUsed()), big.NewRat(6, 5))
curInt := new(big.Int).Div(current.Num(), current.Denom())
decay := new(big.Int).Div(parent.GasLimit(), params.GasLimitBoundDivisor)
contrib := new(big.Int).Mul(parent.GasUsed(), big.NewInt(3))
contrib = contrib.Div(contrib, big.NewInt(2))
contrib = contrib.Div(contrib, params.GasLimitBoundDivisor)
result := new(big.Int).Add(previous, curInt)
result.Div(result, big.NewInt(1024))
return common.BigMax(params.GenesisGasLimit, result)
gl := new(big.Int).Sub(parent.GasLimit(), decay)
gl = gl.Add(gl, contrib)
gl = common.BigMax(gl, params.MinGasLimit)
if gl.Cmp(params.GenesisGasLimit) < 0 {
gl2 := new(big.Int).Add(parent.GasLimit(), decay)
return common.BigMin(params.GenesisGasLimit, gl2)
}
return gl
}
type ChainManager struct {
@ -525,7 +531,7 @@ func (self *ChainManager) InsertChain(chain types.Blocks) (int, error) {
}
// Setting block.Td regardless of error (known for example) prevents errors down the line
// in the protocol handler
block.Td = new(big.Int).Set(CalculateTD(block, self.GetBlock(block.ParentHash())))
block.Td = new(big.Int).Set(CalcTD(block, self.GetBlock(block.ParentHash())))
// Call in to the block processor and check for errors. It's likely that if one block fails
// all others will fail too (unless a known block is returned).