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miner: gas limit strategy, target 3141592 & def gas price 50 Shannon

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This commit is contained in:
Gustav Simonsson 2015-08-03 02:46:34 +02:00
parent fc79d32dd3
commit d9fb2c1707
3 changed files with 21 additions and 6 deletions
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6
cmd/utils/flags.go
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@ -149,7 +149,7 @@ var (
GasPriceFlag = cli.StringFlag{ GasPriceFlag = cli.StringFlag{
Name: "gasprice", Name: "gasprice",
Usage: "Sets the minimal gasprice when mining transactions", Usage: "Sets the minimal gasprice when mining transactions",
Value: new(big.Int).Mul(big.NewInt(500), common.Shannon).String(), Value: new(big.Int).Mul(big.NewInt(50), common.Shannon).String(),
} }
UnlockedAccountFlag = cli.StringFlag{ UnlockedAccountFlag = cli.StringFlag{
@ -309,12 +309,12 @@ var (
GpoMinGasPriceFlag = cli.StringFlag{ GpoMinGasPriceFlag = cli.StringFlag{
Name: "gpomin", Name: "gpomin",
Usage: "Minimum suggested gas price", Usage: "Minimum suggested gas price",
Value: new(big.Int).Mul(big.NewInt(1), common.Szabo).String(), Value: new(big.Int).Mul(big.NewInt(50), common.Shannon).String(),
} }
GpoMaxGasPriceFlag = cli.StringFlag{ GpoMaxGasPriceFlag = cli.StringFlag{
Name: "gpomax", Name: "gpomax",
Usage: "Maximum suggested gas price", Usage: "Maximum suggested gas price",
Value: new(big.Int).Mul(big.NewInt(100), common.Szabo).String(), Value: new(big.Int).Mul(big.NewInt(100), common.Shannon).String(),
} }
GpoFullBlockRatioFlag = cli.IntFlag{ GpoFullBlockRatioFlag = cli.IntFlag{
Name: "gpofull", Name: "gpofull",

17
core/chain_util.go
View file

@ -69,12 +69,27 @@ func CalcTD(block, parent *types.Block) *big.Int {
// CalcGasLimit computes the gas limit of the next block after parent. // CalcGasLimit computes the gas limit of the next block after parent.
// The result may be modified by the caller. // The result may be modified by the caller.
// This is miner strategy, not consensus protocol.
func CalcGasLimit(parent *types.Block) *big.Int { func CalcGasLimit(parent *types.Block) *big.Int {
decay := new(big.Int).Div(parent.GasLimit(), params.GasLimitBoundDivisor) // contrib = (parentGasUsed * 3 / 2) / 1024
contrib := new(big.Int).Mul(parent.GasUsed(), big.NewInt(3)) contrib := new(big.Int).Mul(parent.GasUsed(), big.NewInt(3))
contrib = contrib.Div(contrib, big.NewInt(2)) contrib = contrib.Div(contrib, big.NewInt(2))
contrib = contrib.Div(contrib, params.GasLimitBoundDivisor) contrib = contrib.Div(contrib, params.GasLimitBoundDivisor)
// decay = parentGasLimit / 1024 -1
decay := new(big.Int).Div(parent.GasLimit(), params.GasLimitBoundDivisor)
decay.Sub(decay, big.NewInt(1))
/*
strategy: gasLimit of block-to-mine is set depending on parent's
gasUsed value. if parentGasUsed > parentGasLimit * (2/3) then we
increase it, otherwise lower it (or leave it unchanged if it's right
at that usage) the amount increased/decreased depends on how far away
from parentGasLimit * (2/3) parentGasUsed is.
however, if we're below the target (GenesisGasLimit) we increase the
limit as much as we can (parentGasLimit / 1024 -1)
*/
gl := new(big.Int).Sub(parent.GasLimit(), decay) gl := new(big.Int).Sub(parent.GasLimit(), decay)
gl = gl.Add(gl, contrib) gl = gl.Add(gl, contrib)
gl = gl.Add(gl, big.NewInt(1)) gl = gl.Add(gl, big.NewInt(1))

2
params/protocol_params.go
View file

@ -40,7 +40,7 @@ var (
Sha256WordGas = big.NewInt(12) // Sha256WordGas = big.NewInt(12) //
MinGasLimit = big.NewInt(5000) // Minimum the gas limit may ever be. MinGasLimit = big.NewInt(5000) // Minimum the gas limit may ever be.
GenesisGasLimit = big.NewInt(5000) // Gas limit of the Genesis block. GenesisGasLimit = big.NewInt(3141592) // Gas limit of the Genesis block.
Sha3Gas = big.NewInt(30) // Once per SHA3 operation. Sha3Gas = big.NewInt(30) // Once per SHA3 operation.
Sha256Gas = big.NewInt(60) // Sha256Gas = big.NewInt(60) //