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make Precompile injectable into block context

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This commit is contained in:
ramtinms 2023-12-21 13:42:57 -08:00
parent cca94792a4
commit fbea4aab3e
1 changed files with 36 additions and 20 deletions
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36
core/vm/evm.go
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@ -35,24 +35,30 @@ type (
// GetHashFunc returns the n'th block hash in the blockchain
// and is used by the BLOCKHASH EVM op code.
GetHashFunc func(uint64) common.Hash
// HasPrecompileFunc checks if an address has a precompile contract associated with it.
// if yes, it returns the precompiled contract and a boolean
HasPrecompileFunc func(addr common.Address) (PrecompiledContract, bool)
)
func (evm *EVM) precompile(addr common.Address) (PrecompiledContract, bool) {
// getDefaultPrecompileFunc returns the default precompile function
func getDefaultPrecompileFunc(chainRules params.Rules) HasPrecompileFunc {
return func(addr common.Address) (PrecompiledContract, bool) {
var precompiles map[common.Address]PrecompiledContract
switch {
case evm.chainRules.IsCancun:
case chainRules.IsCancun:
precompiles = PrecompiledContractsCancun
case evm.chainRules.IsBerlin:
case chainRules.IsBerlin:
precompiles = PrecompiledContractsBerlin
case evm.chainRules.IsIstanbul:
case chainRules.IsIstanbul:
precompiles = PrecompiledContractsIstanbul
case evm.chainRules.IsByzantium:
case chainRules.IsByzantium:
precompiles = PrecompiledContractsByzantium
default:
precompiles = PrecompiledContractsHomestead
}
p, ok := precompiles[addr]
return p, ok
}
}
// BlockContext provides the EVM with auxiliary information. Once provided
@ -65,6 +71,8 @@ type BlockContext struct {
Transfer TransferFunc
// GetHash returns the hash corresponding to n
GetHash GetHashFunc
// HasPrecompile returns the precompile for an address
HasPrecompile HasPrecompileFunc
// Block information
Coinbase common.Address // Provides information for COINBASE
@ -137,15 +145,23 @@ func NewEVM(blockCtx BlockContext, txCtx TxContext, statedb StateDB, chainConfig
blockCtx.BlobBaseFee = new(big.Int)
}
}
chainRules := chainConfig.Rules(blockCtx.BlockNumber, blockCtx.Random != nil, blockCtx.Time)
// set default precompile if is not set
if blockCtx.HasPrecompile == nil {
blockCtx.HasPrecompile = getDefaultPrecompileFunc(chainRules)
}
evm := &EVM{
Context: blockCtx,
TxContext: txCtx,
StateDB: statedb,
Config: config,
chainConfig: chainConfig,
chainRules: chainConfig.Rules(blockCtx.BlockNumber, blockCtx.Random != nil, blockCtx.Time),
chainRules: chainRules,
}
evm.interpreter = NewEVMInterpreter(evm)
return evm
}
@ -186,7 +202,7 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
return nil, gas, ErrInsufficientBalance
}
snapshot := evm.StateDB.Snapshot()
p, isPrecompile := evm.precompile(addr)
p, isPrecompile := evm.Context.HasPrecompile(addr)
debug := evm.Config.Tracer != nil
if !evm.StateDB.Exist(addr) {
@ -286,7 +302,7 @@ func (evm *EVM) CallCode(caller ContractRef, addr common.Address, input []byte,
}
// It is allowed to call precompiles, even via delegatecall
if p, isPrecompile := evm.precompile(addr); isPrecompile {
if p, isPrecompile := evm.Context.HasPrecompile(addr); isPrecompile {
ret, gas, err = RunPrecompiledContract(p, input, gas)
} else {
addrCopy := addr
@ -331,7 +347,7 @@ func (evm *EVM) DelegateCall(caller ContractRef, addr common.Address, input []by
}
// It is allowed to call precompiles, even via delegatecall
if p, isPrecompile := evm.precompile(addr); isPrecompile {
if p, isPrecompile := evm.Context.HasPrecompile(addr); isPrecompile {
ret, gas, err = RunPrecompiledContract(p, input, gas)
} else {
addrCopy := addr
@ -380,7 +396,7 @@ func (evm *EVM) StaticCall(caller ContractRef, addr common.Address, input []byte
}(gas)
}
if p, isPrecompile := evm.precompile(addr); isPrecompile {
if p, isPrecompile := evm.Context.HasPrecompile(addr); isPrecompile {
ret, gas, err = RunPrecompiledContract(p, input, gas)
} else {
// At this point, we use a copy of address. If we don't, the go compiler will