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accounts/abi/bind: fix bounded contracts and sim backend for 1559 (#2…
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…3038)

* accounts/abi/bind: fix bounded contracts and sim backend for 1559

* accounts/abi/bind, ethclient: don't rely on chain config for gas prices

* all: enable London for all internal tests

* les: get receipt type info in les tests

* les: fix weird test

Co-authored-by: Martin Holst Swende <[email protected]>
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@karalabe @holiman
karalabe and holiman authored Jun 15, 2021
1 parent 087ed9c commit 7a7abe3
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Showing 40 changed files with 449 additions and 236 deletions.
22 changes: 18 additions & 4 deletions accounts/abi/bind/backend.go
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Original file line number Diff line number Diff line change
Expand Up @@ -32,12 +32,12 @@ var (
// have any code associated with it (i.e. suicided).
ErrNoCode = errors.New("no contract code at given address")

// This error is raised when attempting to perform a pending state action
// ErrNoPendingState is raised when attempting to perform a pending state action
// on a backend that doesn't implement PendingContractCaller.
ErrNoPendingState = errors.New("backend does not support pending state")

// This error is returned by WaitDeployed if contract creation leaves an
// empty contract behind.
// ErrNoCodeAfterDeploy is returned by WaitDeployed if contract creation leaves
// an empty contract behind.
ErrNoCodeAfterDeploy = errors.New("no contract code after deployment")
)

Expand All @@ -47,7 +47,8 @@ type ContractCaller interface {
// CodeAt returns the code of the given account. This is needed to differentiate
// between contract internal errors and the local chain being out of sync.
CodeAt(ctx context.Context, contract common.Address, blockNumber *big.Int) ([]byte, error)
// ContractCall executes an Ethereum contract call with the specified data as the

// CallContract executes an Ethereum contract call with the specified data as the
// input.
CallContract(ctx context.Context, call ethereum.CallMsg, blockNumber *big.Int) ([]byte, error)
}
Expand All @@ -58,6 +59,7 @@ type ContractCaller interface {
type PendingContractCaller interface {
// PendingCodeAt returns the code of the given account in the pending state.
PendingCodeAt(ctx context.Context, contract common.Address) ([]byte, error)

// PendingCallContract executes an Ethereum contract call against the pending state.
PendingCallContract(ctx context.Context, call ethereum.CallMsg) ([]byte, error)
}
Expand All @@ -67,19 +69,31 @@ type PendingContractCaller interface {
// used when the user does not provide some needed values, but rather leaves it up
// to the transactor to decide.
type ContractTransactor interface {
// HeaderByNumber returns a block header from the current canonical chain. If
// number is nil, the latest known header is returned.
HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)

// PendingCodeAt returns the code of the given account in the pending state.
PendingCodeAt(ctx context.Context, account common.Address) ([]byte, error)

// PendingNonceAt retrieves the current pending nonce associated with an account.
PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)

// SuggestGasPrice retrieves the currently suggested gas price to allow a timely
// execution of a transaction.
SuggestGasPrice(ctx context.Context) (*big.Int, error)

// SuggestGasTipCap retrieves the currently suggested 1559 priority fee to allow
// a timely execution of a transaction.
SuggestGasTipCap(ctx context.Context) (*big.Int, error)

// EstimateGas tries to estimate the gas needed to execute a specific
// transaction based on the current pending state of the backend blockchain.
// There is no guarantee that this is the true gas limit requirement as other
// transactions may be added or removed by miners, but it should provide a basis
// for setting a reasonable default.
EstimateGas(ctx context.Context, call ethereum.CallMsg) (gas uint64, err error)

// SendTransaction injects the transaction into the pending pool for execution.
SendTransaction(ctx context.Context, tx *types.Transaction) error
}
Expand Down
42 changes: 38 additions & 4 deletions accounts/abi/bind/backends/simulated.go
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Original file line number Diff line number Diff line change
Expand Up @@ -465,6 +465,12 @@ func (b *SimulatedBackend) SuggestGasPrice(ctx context.Context) (*big.Int, error
return big.NewInt(1), nil
}

// SuggestGasTipCap implements ContractTransactor.SuggestGasTipCap. Since the simulated
// chain doesn't have miners, we just return a gas tip of 1 for any call.
func (b *SimulatedBackend) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
return big.NewInt(1), nil
}

// EstimateGas executes the requested code against the currently pending block/state and
// returns the used amount of gas.
func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMsg) (uint64, error) {
Expand Down Expand Up @@ -561,10 +567,38 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
// callContract implements common code between normal and pending contract calls.
// state is modified during execution, make sure to copy it if necessary.
func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallMsg, block *types.Block, stateDB *state.StateDB) (*core.ExecutionResult, error) {
// Ensure message is initialized properly.
if call.GasPrice == nil {
call.GasPrice = big.NewInt(1)
// Gas prices post 1559 need to be initialized
if call.GasPrice != nil && (call.GasFeeCap != nil || call.GasTipCap != nil) {
return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
}
head := b.blockchain.CurrentHeader()
if !b.blockchain.Config().IsLondon(head.Number) {
// If there's no basefee, then it must be a non-1559 execution
if call.GasPrice == nil {
call.GasPrice = new(big.Int)
}
call.GasFeeCap, call.GasTipCap = call.GasPrice, call.GasPrice
} else {
// A basefee is provided, necessitating 1559-type execution
if call.GasPrice != nil {
// User specified the legacy gas field, convert to 1559 gas typing
call.GasFeeCap, call.GasTipCap = call.GasPrice, call.GasPrice
} else {
// User specified 1559 gas feilds (or none), use those
if call.GasFeeCap == nil {
call.GasFeeCap = new(big.Int)
}
if call.GasTipCap == nil {
call.GasTipCap = new(big.Int)
}
// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
call.GasPrice = new(big.Int)
if call.GasFeeCap.BitLen() > 0 || call.GasTipCap.BitLen() > 0 {
call.GasPrice = math.BigMin(new(big.Int).Add(call.GasTipCap, head.BaseFee), call.GasFeeCap)
}
}
}
// Ensure message is initialized properly.
if call.Gas == 0 {
call.Gas = 50000000
}
Expand All @@ -581,7 +615,7 @@ func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallM
evmContext := core.NewEVMBlockContext(block.Header(), b.blockchain, nil)
// Create a new environment which holds all relevant information
// about the transaction and calling mechanisms.
vmEnv := vm.NewEVM(evmContext, txContext, stateDB, b.config, vm.Config{})
vmEnv := vm.NewEVM(evmContext, txContext, stateDB, b.config, vm.Config{NoBaseFee: true})
gasPool := new(core.GasPool).AddGas(math.MaxUint64)

return core.NewStateTransition(vmEnv, msg, gasPool).TransitionDb()
Expand Down
81 changes: 55 additions & 26 deletions accounts/abi/bind/backends/simulated_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -59,9 +59,12 @@ func TestSimulatedBackend(t *testing.T) {
}

// generate a transaction and confirm you can retrieve it
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

code := `6060604052600a8060106000396000f360606040526008565b00`
var gas uint64 = 3000000
tx := types.NewContractCreation(0, big.NewInt(0), gas, big.NewInt(1), common.FromHex(code))
tx := types.NewContractCreation(0, big.NewInt(0), gas, gasPrice, common.FromHex(code))
tx, _ = types.SignTx(tx, types.HomesteadSigner{}, key)

err = sim.SendTransaction(context.Background(), tx)
Expand Down Expand Up @@ -111,14 +114,14 @@ var expectedReturn = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
func simTestBackend(testAddr common.Address) *SimulatedBackend {
return NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
testAddr: {Balance: big.NewInt(10000000000000000)},
}, 10000000,
)
}

func TestNewSimulatedBackend(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
expectedBal := big.NewInt(10000000000)
expectedBal := big.NewInt(10000000000000000)
sim := simTestBackend(testAddr)
defer sim.Close()

Expand Down Expand Up @@ -157,8 +160,12 @@ func TestAdjustTime(t *testing.T) {
func TestNewAdjustTimeFail(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
sim := simTestBackend(testAddr)

// Create tx and send
tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand All @@ -179,7 +186,7 @@ func TestNewAdjustTimeFail(t *testing.T) {
t.Errorf("adjusted time not equal to a minute. prev: %v, new: %v", prevTime, newTime)
}
// Put a transaction after adjusting time
tx2 := types.NewTransaction(1, testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
tx2 := types.NewTransaction(1, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx2, err := types.SignTx(tx2, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand All @@ -194,7 +201,7 @@ func TestNewAdjustTimeFail(t *testing.T) {

func TestBalanceAt(t *testing.T) {
testAddr := crypto.PubkeyToAddress(testKey.PublicKey)
expectedBal := big.NewInt(10000000000)
expectedBal := big.NewInt(10000000000000000)
sim := simTestBackend(testAddr)
defer sim.Close()
bgCtx := context.Background()
Expand Down Expand Up @@ -282,7 +289,10 @@ func TestNonceAt(t *testing.T) {
}

// create a signed transaction to send
tx := types.NewTransaction(nonce, testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(nonce, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -323,7 +333,10 @@ func TestSendTransaction(t *testing.T) {
bgCtx := context.Background()

// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -351,14 +364,17 @@ func TestTransactionByHash(t *testing.T) {

sim := NewSimulatedBackend(
core.GenesisAlloc{
testAddr: {Balance: big.NewInt(10000000000)},
testAddr: {Balance: big.NewInt(10000000000000000)},
}, 10000000,
)
defer sim.Close()
bgCtx := context.Background()

// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -534,16 +550,16 @@ func TestEstimateGasWithPrice(t *testing.T) {
To: &recipient,
Gas: 0,
GasPrice: big.NewInt(0),
Value: big.NewInt(1000),
Value: big.NewInt(100000000000),
Data: nil,
}, 21000, nil},

{"EstimateWithPrice", ethereum.CallMsg{
From: addr,
To: &recipient,
Gas: 0,
GasPrice: big.NewInt(1000),
Value: big.NewInt(1000),
GasPrice: big.NewInt(100000000000),
Value: big.NewInt(100000000000),
Data: nil,
}, 21000, nil},

Expand All @@ -561,23 +577,23 @@ func TestEstimateGasWithPrice(t *testing.T) {
To: &recipient,
Gas: 0,
GasPrice: big.NewInt(2e14), // gascost = 4.2ether
Value: big.NewInt(1000),
Value: big.NewInt(100000000000),
Data: nil,
}, 21000, errors.New("gas required exceeds allowance (10999)")}, // 10999=(2.2ether-1000wei)/(2e14)
}
for _, c := range cases {
for i, c := range cases {
got, err := sim.EstimateGas(context.Background(), c.message)
if c.expectError != nil {
if err == nil {
t.Fatalf("Expect error, got nil")
t.Fatalf("test %d: expect error, got nil", i)
}
if c.expectError.Error() != err.Error() {
t.Fatalf("Expect error, want %v, got %v", c.expectError, err)
t.Fatalf("test %d: expect error, want %v, got %v", i, c.expectError, err)
}
continue
}
if got != c.expect {
t.Fatalf("Gas estimation mismatch, want %d, got %d", c.expect, got)
t.Fatalf("test %d: gas estimation mismatch, want %d, got %d", i, c.expect, got)
}
}
}
Expand Down Expand Up @@ -669,9 +685,11 @@ func TestTransactionCount(t *testing.T) {
if count != 0 {
t.Errorf("expected transaction count of %v does not match actual count of %v", 0, count)
}

// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -724,9 +742,11 @@ func TestTransactionInBlock(t *testing.T) {
if pendingNonce != uint64(0) {
t.Errorf("expected pending nonce of 0 got %v", pendingNonce)
}

// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -781,7 +801,10 @@ func TestPendingNonceAt(t *testing.T) {
}

// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand All @@ -804,7 +827,7 @@ func TestPendingNonceAt(t *testing.T) {
}

// make a new transaction with a nonce of 1
tx = types.NewTransaction(uint64(1), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
tx = types.NewTransaction(uint64(1), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err = types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -833,7 +856,10 @@ func TestTransactionReceipt(t *testing.T) {
bgCtx := context.Background()

// create a signed transaction to send
tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

tx := types.NewTransaction(uint64(0), testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, testKey)
if err != nil {
t.Errorf("could not sign tx: %v", err)
Expand Down Expand Up @@ -1259,7 +1285,10 @@ func TestForkResendTx(t *testing.T) {
// 1.
parent := sim.blockchain.CurrentBlock()
// 2.
_tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, big.NewInt(1), nil)
head, _ := sim.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))

_tx := types.NewTransaction(0, testAddr, big.NewInt(1000), params.TxGas, gasPrice, nil)
tx, _ := types.SignTx(_tx, types.HomesteadSigner{}, testKey)
sim.SendTransaction(context.Background(), tx)
sim.Commit()
Expand Down
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