0fda25e471
Fixes the CaptureStart api to include the EVM, thus being able to set the statedb early on. This pr also exposes the struct we used internally in the interpreter to encapsulate the contract, mem, stack, rstack, so we pass it as a single struct to the tracer, and removes the error returns on the capture methods.
76 lines
2.7 KiB
Go
76 lines
2.7 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/params"
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"github.com/holiman/uint256"
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)
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type dummyContractRef struct {
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calledForEach bool
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}
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func (dummyContractRef) ReturnGas(*big.Int) {}
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func (dummyContractRef) Address() common.Address { return common.Address{} }
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func (dummyContractRef) Value() *big.Int { return new(big.Int) }
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func (dummyContractRef) SetCode(common.Hash, []byte) {}
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func (d *dummyContractRef) ForEachStorage(callback func(key, value common.Hash) bool) {
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d.calledForEach = true
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}
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func (d *dummyContractRef) SubBalance(amount *big.Int) {}
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func (d *dummyContractRef) AddBalance(amount *big.Int) {}
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func (d *dummyContractRef) SetBalance(*big.Int) {}
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func (d *dummyContractRef) SetNonce(uint64) {}
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func (d *dummyContractRef) Balance() *big.Int { return new(big.Int) }
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type dummyStatedb struct {
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state.StateDB
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}
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func (*dummyStatedb) GetRefund() uint64 { return 1337 }
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func TestStoreCapture(t *testing.T) {
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var (
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env = NewEVM(BlockContext{}, TxContext{}, &dummyStatedb{}, params.TestChainConfig, Config{})
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logger = NewStructLogger(nil)
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contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), 0)
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scope = &ScopeContext{
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Memory: NewMemory(),
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Stack: newstack(),
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Contract: contract,
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}
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)
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scope.Stack.push(uint256.NewInt().SetUint64(1))
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scope.Stack.push(uint256.NewInt())
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var index common.Hash
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logger.CaptureState(env, 0, SSTORE, 0, 0, scope, nil, 0, nil)
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if len(logger.storage[contract.Address()]) == 0 {
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t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(),
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len(logger.storage[contract.Address()]))
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}
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exp := common.BigToHash(big.NewInt(1))
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if logger.storage[contract.Address()][index] != exp {
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t.Errorf("expected %x, got %x", exp, logger.storage[contract.Address()][index])
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}
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}
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