gitlab.com/flarenetwork/coreth@v0.1.1/core/vm/logger_test.go (about)

     1  // (c) 2019-2020, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2016 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package vm
    28  
    29  import (
    30  	"math/big"
    31  	"testing"
    32  
    33  	"github.com/ethereum/go-ethereum/common"
    34  	"github.com/holiman/uint256"
    35  	"gitlab.com/flarenetwork/coreth/core/state"
    36  	"gitlab.com/flarenetwork/coreth/params"
    37  )
    38  
    39  type dummyContractRef struct {
    40  	calledForEach bool
    41  }
    42  
    43  func (dummyContractRef) Address() common.Address     { return common.Address{} }
    44  func (dummyContractRef) Value() *big.Int             { return new(big.Int) }
    45  func (dummyContractRef) SetCode(common.Hash, []byte) {}
    46  func (d *dummyContractRef) ForEachStorage(callback func(key, value common.Hash) bool) {
    47  	d.calledForEach = true
    48  }
    49  func (d *dummyContractRef) SubBalance(amount *big.Int) {}
    50  func (d *dummyContractRef) AddBalance(amount *big.Int) {}
    51  func (d *dummyContractRef) SetBalance(*big.Int)        {}
    52  func (d *dummyContractRef) SetNonce(uint64)            {}
    53  func (d *dummyContractRef) Balance() *big.Int          { return new(big.Int) }
    54  
    55  type dummyStatedb struct {
    56  	state.StateDB
    57  }
    58  
    59  func (*dummyStatedb) GetRefund() uint64 { return 1337 }
    60  
    61  func TestStoreCapture(t *testing.T) {
    62  	var (
    63  		env      = NewEVM(BlockContext{}, TxContext{}, &dummyStatedb{}, params.TestChainConfig, Config{})
    64  		logger   = NewStructLogger(nil)
    65  		contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), 0)
    66  		scope    = &ScopeContext{
    67  			Memory:   NewMemory(),
    68  			Stack:    newstack(),
    69  			Contract: contract,
    70  		}
    71  	)
    72  	scope.Stack.push(uint256.NewInt(1))
    73  	scope.Stack.push(new(uint256.Int))
    74  	var index common.Hash
    75  	logger.CaptureState(env, 0, SSTORE, 0, 0, scope, nil, 0, nil)
    76  	if len(logger.storage[contract.Address()]) == 0 {
    77  		t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(),
    78  			len(logger.storage[contract.Address()]))
    79  	}
    80  	exp := common.BigToHash(big.NewInt(1))
    81  	if logger.storage[contract.Address()][index] != exp {
    82  		t.Errorf("expected %x, got %x", exp, logger.storage[contract.Address()][index])
    83  	}
    84  }