065f82a8cc
* accounts, ethclient: minor tweaks on the new simulated backend * ethclient/simulated: add an initial batch of gas options * accounts, ethclient: remove mandatory gasLimit constructor param * accounts, ethclient: minor option naming tweaks
310 lines
8.4 KiB
Go
310 lines
8.4 KiB
Go
// Copyright 2019 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 simulated
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import (
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"context"
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"crypto/ecdsa"
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"math/big"
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"math/rand"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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var _ bind.ContractBackend = (Client)(nil)
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var (
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testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
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testAddr = crypto.PubkeyToAddress(testKey.PublicKey)
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)
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func simTestBackend(testAddr common.Address) *Backend {
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return NewBackend(
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core.GenesisAlloc{
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testAddr: {Balance: big.NewInt(10000000000000000)},
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},
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)
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}
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func newTx(sim *Backend, key *ecdsa.PrivateKey) (*types.Transaction, error) {
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client := sim.Client()
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// create a signed transaction to send
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head, _ := client.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
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gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
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addr := crypto.PubkeyToAddress(key.PublicKey)
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chainid, _ := client.ChainID(context.Background())
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nonce, err := client.PendingNonceAt(context.Background(), addr)
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if err != nil {
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return nil, err
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}
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tx := types.NewTx(&types.DynamicFeeTx{
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ChainID: chainid,
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Nonce: nonce,
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GasTipCap: big.NewInt(1),
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GasFeeCap: gasPrice,
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Gas: 21000,
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To: &addr,
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})
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return types.SignTx(tx, types.LatestSignerForChainID(chainid), key)
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}
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func TestNewBackend(t *testing.T) {
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sim := NewBackend(core.GenesisAlloc{})
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defer sim.Close()
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client := sim.Client()
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num, err := client.BlockNumber(context.Background())
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if err != nil {
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t.Fatal(err)
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}
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if num != 0 {
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t.Fatalf("expected 0 got %v", num)
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}
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// Create a block
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sim.Commit()
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num, err = client.BlockNumber(context.Background())
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if err != nil {
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t.Fatal(err)
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}
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if num != 1 {
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t.Fatalf("expected 1 got %v", num)
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}
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}
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func TestAdjustTime(t *testing.T) {
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sim := NewBackend(core.GenesisAlloc{})
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defer sim.Close()
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client := sim.Client()
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block1, _ := client.BlockByNumber(context.Background(), nil)
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// Create a block
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if err := sim.AdjustTime(time.Minute); err != nil {
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t.Fatal(err)
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}
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block2, _ := client.BlockByNumber(context.Background(), nil)
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prevTime := block1.Time()
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newTime := block2.Time()
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if newTime-prevTime != uint64(time.Minute) {
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t.Errorf("adjusted time not equal to 60 seconds. prev: %v, new: %v", prevTime, newTime)
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}
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}
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func TestSendTransaction(t *testing.T) {
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sim := simTestBackend(testAddr)
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defer sim.Close()
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client := sim.Client()
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ctx := context.Background()
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signedTx, err := newTx(sim, testKey)
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if err != nil {
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t.Errorf("could not create transaction: %v", err)
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}
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// send tx to simulated backend
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err = client.SendTransaction(ctx, signedTx)
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if err != nil {
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t.Errorf("could not add tx to pending block: %v", err)
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}
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sim.Commit()
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block, err := client.BlockByNumber(ctx, big.NewInt(1))
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if err != nil {
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t.Errorf("could not get block at height 1: %v", err)
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}
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if signedTx.Hash() != block.Transactions()[0].Hash() {
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t.Errorf("did not commit sent transaction. expected hash %v got hash %v", block.Transactions()[0].Hash(), signedTx.Hash())
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}
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}
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// TestFork check that the chain length after a reorg is correct.
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// Steps:
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// 1. Save the current block which will serve as parent for the fork.
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// 2. Mine n blocks with n ∈ [0, 20].
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// 3. Assert that the chain length is n.
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// 4. Fork by using the parent block as ancestor.
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// 5. Mine n+1 blocks which should trigger a reorg.
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// 6. Assert that the chain length is n+1.
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// Since Commit() was called 2n+1 times in total,
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// having a chain length of just n+1 means that a reorg occurred.
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func TestFork(t *testing.T) {
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t.Parallel()
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testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
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sim := simTestBackend(testAddr)
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defer sim.Close()
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client := sim.Client()
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ctx := context.Background()
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// 1.
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parent, _ := client.HeaderByNumber(ctx, nil)
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// 2.
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n := int(rand.Int31n(21))
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for i := 0; i < n; i++ {
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sim.Commit()
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}
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// 3.
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b, _ := client.BlockNumber(ctx)
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if b != uint64(n) {
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t.Error("wrong chain length")
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}
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// 4.
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sim.Fork(parent.Hash())
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// 5.
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for i := 0; i < n+1; i++ {
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sim.Commit()
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}
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// 6.
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b, _ = client.BlockNumber(ctx)
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if b != uint64(n+1) {
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t.Error("wrong chain length")
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}
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}
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// TestForkResendTx checks that re-sending a TX after a fork
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// is possible and does not cause a "nonce mismatch" panic.
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// Steps:
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// 1. Save the current block which will serve as parent for the fork.
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// 2. Send a transaction.
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// 3. Check that the TX is included in block 1.
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// 4. Fork by using the parent block as ancestor.
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// 5. Mine a block, Re-send the transaction and mine another one.
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// 6. Check that the TX is now included in block 2.
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func TestForkResendTx(t *testing.T) {
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t.Parallel()
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testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
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sim := simTestBackend(testAddr)
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defer sim.Close()
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client := sim.Client()
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ctx := context.Background()
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// 1.
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parent, _ := client.HeaderByNumber(ctx, nil)
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// 2.
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tx, err := newTx(sim, testKey)
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if err != nil {
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t.Fatalf("could not create transaction: %v", err)
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}
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client.SendTransaction(ctx, tx)
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sim.Commit()
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// 3.
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receipt, _ := client.TransactionReceipt(ctx, tx.Hash())
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if h := receipt.BlockNumber.Uint64(); h != 1 {
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t.Errorf("TX included in wrong block: %d", h)
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}
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// 4.
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if err := sim.Fork(parent.Hash()); err != nil {
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t.Errorf("forking: %v", err)
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}
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// 5.
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sim.Commit()
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if err := client.SendTransaction(ctx, tx); err != nil {
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t.Fatalf("sending transaction: %v", err)
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}
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sim.Commit()
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receipt, _ = client.TransactionReceipt(ctx, tx.Hash())
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if h := receipt.BlockNumber.Uint64(); h != 2 {
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t.Errorf("TX included in wrong block: %d", h)
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}
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}
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func TestCommitReturnValue(t *testing.T) {
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t.Parallel()
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testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
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sim := simTestBackend(testAddr)
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defer sim.Close()
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client := sim.Client()
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ctx := context.Background()
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// Test if Commit returns the correct block hash
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h1 := sim.Commit()
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cur, _ := client.HeaderByNumber(ctx, nil)
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if h1 != cur.Hash() {
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t.Error("Commit did not return the hash of the last block.")
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}
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// Create a block in the original chain (containing a transaction to force different block hashes)
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head, _ := client.HeaderByNumber(ctx, nil) // Should be child's, good enough
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gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
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_tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
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tx, _ := types.SignTx(_tx, types.HomesteadSigner{}, testKey)
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client.SendTransaction(ctx, tx)
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h2 := sim.Commit()
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// Create another block in the original chain
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sim.Commit()
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// Fork at the first bock
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if err := sim.Fork(h1); err != nil {
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t.Errorf("forking: %v", err)
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}
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// Test if Commit returns the correct block hash after the reorg
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h2fork := sim.Commit()
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if h2 == h2fork {
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t.Error("The block in the fork and the original block are the same block!")
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}
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if header, err := client.HeaderByHash(ctx, h2fork); err != nil || header == nil {
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t.Error("Could not retrieve the just created block (side-chain)")
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}
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}
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// TestAdjustTimeAfterFork ensures that after a fork, AdjustTime uses the pending fork
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// block's parent rather than the canonical head's parent.
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func TestAdjustTimeAfterFork(t *testing.T) {
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t.Parallel()
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testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
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sim := simTestBackend(testAddr)
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defer sim.Close()
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client := sim.Client()
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ctx := context.Background()
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sim.Commit() // h1
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h1, _ := client.HeaderByNumber(ctx, nil)
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sim.Commit() // h2
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sim.Fork(h1.Hash())
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sim.AdjustTime(1 * time.Second)
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sim.Commit()
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head, _ := client.HeaderByNumber(ctx, nil)
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if head.Number.Uint64() == 2 && head.ParentHash != h1.Hash() {
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t.Errorf("failed to build block on fork")
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}
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}
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