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Merge pull request #9 from sei-protocol/precompile-gas

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add precompile interface with dynamically-calculated gas
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codchen 2024-01-04 16:04:38 +08:00 committed by GitHub
commit 6ff4c5e1d8
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7
core/vm/contracts.go
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@ -42,6 +42,10 @@ type PrecompiledContract interface {
Run(evm *EVM, sender common.Address, input []byte) ([]byte, error) // Run runs the precompiled contract Run(evm *EVM, sender common.Address, input []byte) ([]byte, error) // Run runs the precompiled contract
} }
type DynamicGasPrecompiledContract interface {
RunAndCalculateGas(evm *EVM, sender common.Address, input []byte, suppliedGas uint64) (ret []byte, remainingGas uint64, err error) // Run runs the precompiled contract and calculate gas dynamically
}
// PrecompiledContractsHomestead contains the default set of pre-compiled Ethereum // PrecompiledContractsHomestead contains the default set of pre-compiled Ethereum
// contracts used in the Frontier and Homestead releases. // contracts used in the Frontier and Homestead releases.
var PrecompiledContractsHomestead = map[common.Address]PrecompiledContract{ var PrecompiledContractsHomestead = map[common.Address]PrecompiledContract{
@ -169,6 +173,9 @@ func ActivePrecompiles(rules params.Rules) []common.Address {
// - the _remaining_ gas, // - the _remaining_ gas,
// - any error that occurred // - any error that occurred
func RunPrecompiledContract(p PrecompiledContract, evm *EVM, sender common.Address, input []byte, suppliedGas uint64) (ret []byte, remainingGas uint64, err error) { func RunPrecompiledContract(p PrecompiledContract, evm *EVM, sender common.Address, input []byte, suppliedGas uint64) (ret []byte, remainingGas uint64, err error) {
if dp, ok := p.(DynamicGasPrecompiledContract); ok {
return dp.RunAndCalculateGas(evm, sender, input, suppliedGas)
}
gasCost := p.RequiredGas(input) gasCost := p.RequiredGas(input)
if suppliedGas < gasCost { if suppliedGas < gasCost {
return nil, 0, ErrOutOfGas return nil, 0, ErrOutOfGas