57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
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package builders
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import (
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"github.com/filecoin-project/specs-actors/actors/abi"
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"github.com/filecoin-project/specs-actors/actors/abi/big"
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"github.com/filecoin-project/oni/tvx/lotus"
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)
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const (
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overuseNum = 11
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overuseDen = 10
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)
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// CalculateDeduction returns the balance that shall be deducted from the
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// sender's account as a result of applying this message.
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func CalculateDeduction(am *ApplicableMessage) big.Int {
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m := am.Message
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minerReward := GetMinerReward(m.GasLimit, m.GasPremium) // goes to the miner
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burn := CalculateBurn(m.GasLimit, am.Result.GasUsed) // vanishes
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deducted := big.Add(minerReward, burn) // sum of gas accrued
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if am.Result.ExitCode.IsSuccess() {
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deducted = big.Add(deducted, m.Value) // message value
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}
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return deducted
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}
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// GetMinerReward returns the amount that the miner gets to keep, which is
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func GetMinerReward(gasLimit int64, gasPremium abi.TokenAmount) abi.TokenAmount {
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return big.Mul(big.NewInt(gasLimit), gasPremium)
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}
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func GetMinerPenalty(gasLimit int64) big.Int {
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return big.Mul(lotus.BaseFee, big.NewInt(gasLimit))
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}
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// CalculateBurn calcualtes the amount that will be burnt, a function of the
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// gas limit and the gas actually used.
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func CalculateBurn(gasLimit int64, gasUsed int64) big.Int {
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over := gasLimit - (overuseNum*gasUsed)/overuseDen
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if over < 0 {
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over = 0
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}
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if over > gasUsed {
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over = gasUsed
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}
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overestimateGas := big.NewInt(gasLimit - gasUsed)
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overestimateGas = big.Mul(overestimateGas, big.NewInt(over))
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overestimateGas = big.Div(overestimateGas, big.NewInt(gasUsed))
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totalBurnGas := big.Add(overestimateGas, big.NewInt(gasUsed))
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return big.Mul(lotus.BaseFee, totalBurnGas)
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}
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