all: move loggers to eth/tracers (#23892)

* all: mv loggers to eth/tracers

* core/vm: minor

* eth/tracers: tmp comment out testStoreCapture

* eth/tracers: uncomment and fix logger test

* eth/tracers: simplify test

* core/vm: re-add license

* core/vm: minor

* rename LogConfig to Config

eth/tracers/logger/logger_test.go

@@ -0,0 +1,74 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package logger
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+type dummyContractRef struct {
+	calledForEach bool
+}
+
+func (dummyContractRef) Address() common.Address     { return common.Address{} }
+func (dummyContractRef) Value() *big.Int             { return new(big.Int) }
+func (dummyContractRef) SetCode(common.Hash, []byte) {}
+func (d *dummyContractRef) ForEachStorage(callback func(key, value common.Hash) bool) {
+	d.calledForEach = true
+}
+func (d *dummyContractRef) SubBalance(amount *big.Int) {}
+func (d *dummyContractRef) AddBalance(amount *big.Int) {}
+func (d *dummyContractRef) SetBalance(*big.Int)        {}
+func (d *dummyContractRef) SetNonce(uint64)            {}
+func (d *dummyContractRef) Balance() *big.Int          { return new(big.Int) }
+
+type dummyStatedb struct {
+	state.StateDB
+}
+
+func (*dummyStatedb) GetRefund() uint64                                       { return 1337 }
+func (*dummyStatedb) GetState(_ common.Address, _ common.Hash) common.Hash    { return common.Hash{} }
+func (*dummyStatedb) SetState(_ common.Address, _ common.Hash, _ common.Hash) {}
+
+func TestStoreCapture(t *testing.T) {
+	var (
+		logger   = NewStructLogger(nil)
+		env      = vm.NewEVM(vm.BlockContext{}, vm.TxContext{}, &dummyStatedb{}, params.TestChainConfig, vm.Config{Debug: true, Tracer: logger})
+		contract = vm.NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), 100000)
+	)
+	contract.Code = []byte{byte(vm.PUSH1), 0x1, byte(vm.PUSH1), 0x0, byte(vm.SSTORE)}
+	var index common.Hash
+	logger.CaptureStart(env, common.Address{}, contract.Address(), false, nil, 0, nil)
+	_, err := env.Interpreter().Run(contract, []byte{}, false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(logger.storage[contract.Address()]) == 0 {
+		t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(),
+			len(logger.storage[contract.Address()]))
+	}
+	exp := common.BigToHash(big.NewInt(1))
+	if logger.storage[contract.Address()][index] != exp {
+		t.Errorf("expected %x, got %x", exp, logger.storage[contract.Address()][index])
+	}
+}