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add CreateAt functionality

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This commit is contained in:
ramtinms 2024-01-17 14:52:42 -08:00
parent 6f86fdaf87
commit 5d4fc633a4
1 changed files with 30 additions and 9 deletions
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39
core/vm/evm.go
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@ -414,20 +414,30 @@ func (c *codeAndHash) Hash() common.Hash {
} }
// create creates a new contract using code as deployment code. // create creates a new contract using code as deployment code.
func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64, value *big.Int, address common.Address, typ OpCode) ([]byte, common.Address, uint64, error) { func (evm *EVM) create(
caller ContractRef,
codeAndHash *codeAndHash,
gas uint64,
value *big.Int,
address common.Address,
typ OpCode,
updateCallerNonce bool,
) ([]byte, common.Address, uint64, error) {
// Depth check execution. Fail if we're trying to execute above the // Depth check execution. Fail if we're trying to execute above the
// limit. // limit.
if evm.depth > int(params.CallCreateDepth) { if evm.depth > int(params.CallCreateDepth) {
return nil, common.Address{}, gas, ErrDepth return nil, common.Address{}, gas, ErrDepth
} }
if !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) { if value.Sign() > 0 && !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) {
return nil, common.Address{}, gas, ErrInsufficientBalance return nil, common.Address{}, gas, ErrInsufficientBalance
} }
nonce := evm.StateDB.GetNonce(caller.Address()) if updateCallerNonce {
if nonce+1 < nonce { nonce := evm.StateDB.GetNonce(caller.Address())
return nil, common.Address{}, gas, ErrNonceUintOverflow if nonce+1 < nonce {
return nil, common.Address{}, gas, ErrNonceUintOverflow
}
evm.StateDB.SetNonce(caller.Address(), nonce+1)
} }
evm.StateDB.SetNonce(caller.Address(), nonce+1)
// We add this to the access list _before_ taking a snapshot. Even if the creation fails, // We add this to the access list _before_ taking a snapshot. Even if the creation fails,
// the access-list change should not be rolled back // the access-list change should not be rolled back
if evm.chainRules.IsBerlin { if evm.chainRules.IsBerlin {
@ -444,7 +454,10 @@ func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64,
if evm.chainRules.IsEIP158 { if evm.chainRules.IsEIP158 {
evm.StateDB.SetNonce(address, 1) evm.StateDB.SetNonce(address, 1)
} }
evm.Context.Transfer(evm.StateDB, caller.Address(), address, value) // transfer if value bigger than zero
if value.Sign() > 0 {
evm.Context.Transfer(evm.StateDB, caller.Address(), address, value)
}
// Initialise a new contract and set the code that is to be used by the EVM. // Initialise a new contract and set the code that is to be used by the EVM.
// The contract is a scoped environment for this execution context only. // The contract is a scoped environment for this execution context only.
@ -507,7 +520,7 @@ func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64,
// Create creates a new contract using code as deployment code. // Create creates a new contract using code as deployment code.
func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) { func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
contractAddr = crypto.CreateAddress(caller.Address(), evm.StateDB.GetNonce(caller.Address())) contractAddr = crypto.CreateAddress(caller.Address(), evm.StateDB.GetNonce(caller.Address()))
return evm.create(caller, &codeAndHash{code: code}, gas, value, contractAddr, CREATE) return evm.create(caller, &codeAndHash{code: code}, gas, value, contractAddr, CREATE, true)
} }
// Create2 creates a new contract using code as deployment code. // Create2 creates a new contract using code as deployment code.
@ -517,7 +530,15 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
func (evm *EVM) Create2(caller ContractRef, code []byte, gas uint64, endowment *big.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) { func (evm *EVM) Create2(caller ContractRef, code []byte, gas uint64, endowment *big.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
codeAndHash := &codeAndHash{code: code} codeAndHash := &codeAndHash{code: code}
contractAddr = crypto.CreateAddress2(caller.Address(), salt.Bytes32(), codeAndHash.Hash().Bytes()) contractAddr = crypto.CreateAddress2(caller.Address(), salt.Bytes32(), codeAndHash.Hash().Bytes())
return evm.create(caller, codeAndHash, gas, endowment, contractAddr, CREATE2) return evm.create(caller, codeAndHash, gas, endowment, contractAddr, CREATE2, true)
}
// CreateAt creates a new contract using code as deployment code at the given address
//
// the behaviour is similar to Create2 execpt we don't compute the address
// using hash and it doesn't increment the nonce for the caller
func (evm *EVM) CreateAt(caller ContractRef, to common.Address, code []byte, gas uint64, endowment *big.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
return evm.create(caller, &codeAndHash{code: code}, gas, endowment, to, CREATE2, false)
} }
// ChainConfig returns the environment's chain configuration // ChainConfig returns the environment's chain configuration