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accounts/abi/bind: refactor transact method (ethereum#23719)
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@gzliudan
gzliudan committed Sep 23, 2024
1 parent 28ccfe0 commit 6e90eaf
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Showing 2 changed files with 308 additions and 81 deletions.
212 changes: 131 additions & 81 deletions accounts/abi/bind/base.go
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Original file line number Diff line number Diff line change
Expand Up @@ -188,108 +188,158 @@ func (c *BoundContract) Transfer(opts *TransactOpts) (*types.Transaction, error)
return c.transact(opts, &c.address, nil)
}

// transact executes an actual transaction invocation, first deriving any missing
// authorization fields, and then scheduling the transaction for execution.
func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, input []byte) (*types.Transaction, error) {
var err error

// Ensure a valid value field and resolve the account nonce
func (c *BoundContract) createDynamicTx(opts *TransactOpts, contract *common.Address, input []byte, head *types.Header) (*types.Transaction, error) {
// Normalize value
value := opts.Value
if value == nil {
value = new(big.Int)
}
var nonce uint64
if opts.Nonce == nil {
nonce, err = c.transactor.PendingNonceAt(ensureContext(opts.Context), opts.From)
// Estimate TipCap
gasTipCap := opts.GasTipCap
if gasTipCap == nil {
tip, err := c.transactor.SuggestGasTipCap(ensureContext(opts.Context))
if err != nil {
return nil, fmt.Errorf("failed to retrieve account nonce: %v", err)
return nil, err
}
} else {
nonce = opts.Nonce.Uint64()
gasTipCap = tip
}
// Figure out reasonable gas price values
if opts.GasPrice != nil && (opts.GasFeeCap != nil || opts.GasTipCap != nil) {
return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
// Estimate FeeCap
gasFeeCap := opts.GasFeeCap
if gasFeeCap == nil {
gasFeeCap = new(big.Int).Add(
gasTipCap,
new(big.Int).Mul(head.BaseFee, big.NewInt(2)),
)
}
head, err := c.transactor.HeaderByNumber(opts.Context, nil)
if gasFeeCap.Cmp(gasTipCap) < 0 {
return nil, fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", gasFeeCap, gasTipCap)
}
// Estimate GasLimit
gasLimit := opts.GasLimit
if opts.GasLimit == 0 {
var err error
gasLimit, err = c.estimateGasLimit(opts, contract, input, nil, gasTipCap, gasFeeCap, value)
if err != nil {
return nil, err
}
}
// create the transaction
nonce, err := c.getNonce(opts)
if err != nil {
return nil, err
}
if head.BaseFee != nil && opts.GasPrice == nil {
if opts.GasTipCap == nil {
tip, err := c.transactor.SuggestGasTipCap(opts.Context)
if err != nil {
return nil, err
}
opts.GasTipCap = tip
}
if opts.GasFeeCap == nil {
gasFeeCap := new(big.Int).Add(
opts.GasTipCap,
new(big.Int).Mul(head.BaseFee, big.NewInt(2)),
)
opts.GasFeeCap = gasFeeCap
}
if opts.GasFeeCap.Cmp(opts.GasTipCap) < 0 {
return nil, fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", opts.GasFeeCap, opts.GasTipCap)
}
} else {
if opts.GasFeeCap != nil || opts.GasTipCap != nil {
return nil, errors.New("maxFeePerGas or maxPriorityFeePerGas specified but london is not active yet")
}
if opts.GasPrice == nil {
price, err := c.transactor.SuggestGasPrice(ensureContext(opts.Context))
if err != nil {
return nil, err
}
opts.GasPrice = price
baseTx := &types.DynamicFeeTx{
To: contract,
Nonce: nonce,
GasFeeCap: gasFeeCap,
GasTipCap: gasTipCap,
Gas: gasLimit,
Value: value,
Data: input,
}
return types.NewTx(baseTx), nil
}

func (c *BoundContract) createLegacyTx(opts *TransactOpts, contract *common.Address, input []byte) (*types.Transaction, error) {
if opts.GasFeeCap != nil || opts.GasTipCap != nil {
return nil, errors.New("maxFeePerGas or maxPriorityFeePerGas specified but EIP-1559 is not active yet")
}
// Normalize value
value := opts.Value
if value == nil {
value = new(big.Int)
}
// Estimate GasPrice
gasPrice := opts.GasPrice
if gasPrice == nil {
price, err := c.transactor.SuggestGasPrice(ensureContext(opts.Context))
if err != nil {
return nil, err
}
gasPrice = price
}
// Estimate GasLimit
gasLimit := opts.GasLimit
if gasLimit == 0 {
// Gas estimation cannot succeed without code for method invocations
if contract != nil {
if code, err := c.transactor.PendingCodeAt(ensureContext(opts.Context), c.address); err != nil {
return nil, err
} else if len(code) == 0 {
return nil, ErrNoCode
}
}
// If the contract surely has code (or code is not needed), estimate the transaction
msg := XDPoSChain.CallMsg{From: opts.From, To: contract, GasPrice: opts.GasPrice, GasTipCap: opts.GasTipCap, GasFeeCap: opts.GasFeeCap, Value: value, Data: input}
gasLimit, err = c.transactor.EstimateGas(ensureContext(opts.Context), msg)
if opts.GasLimit == 0 {
var err error
gasLimit, err = c.estimateGasLimit(opts, contract, input, gasPrice, nil, nil, value)
if err != nil {
return nil, fmt.Errorf("failed to estimate gas needed: %v", err)
return nil, err
}
}
// Create the transaction, sign it and schedule it for execution
var rawTx *types.Transaction
if opts.GasFeeCap == nil {
baseTx := &types.LegacyTx{
Nonce: nonce,
GasPrice: opts.GasPrice,
Gas: gasLimit,
Value: value,
Data: input,
}
if contract != nil {
baseTx.To = &c.address
// create the transaction
nonce, err := c.getNonce(opts)
if err != nil {
return nil, err
}
baseTx := &types.LegacyTx{
To: contract,
Nonce: nonce,
GasPrice: gasPrice,
Gas: gasLimit,
Value: value,
Data: input,
}
return types.NewTx(baseTx), nil
}

func (c *BoundContract) estimateGasLimit(opts *TransactOpts, contract *common.Address, input []byte, gasPrice, gasTipCap, gasFeeCap, value *big.Int) (uint64, error) {
if contract != nil {
// Gas estimation cannot succeed without code for method invocations.
if code, err := c.transactor.PendingCodeAt(ensureContext(opts.Context), c.address); err != nil {
return 0, err
} else if len(code) == 0 {
return 0, ErrNoCode
}
rawTx = types.NewTx(baseTx)
}
msg := XDPoSChain.CallMsg{
From: opts.From,
To: contract,
GasPrice: gasPrice,
GasTipCap: gasTipCap,
GasFeeCap: gasFeeCap,
Value: value,
Data: input,
}
return c.transactor.EstimateGas(ensureContext(opts.Context), msg)
}

func (c *BoundContract) getNonce(opts *TransactOpts) (uint64, error) {
if opts.Nonce == nil {
return c.transactor.PendingNonceAt(ensureContext(opts.Context), opts.From)
} else {
baseTx := &types.DynamicFeeTx{
Nonce: nonce,
GasFeeCap: opts.GasFeeCap,
GasTipCap: opts.GasTipCap,
Gas: gasLimit,
Value: value,
Data: input,
}
if contract != nil {
baseTx.To = &c.address
return opts.Nonce.Uint64(), nil
}
}

// transact executes an actual transaction invocation, first deriving any missing
// authorization fields, and then scheduling the transaction for execution.
func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, input []byte) (*types.Transaction, error) {
if opts.GasPrice != nil && (opts.GasFeeCap != nil || opts.GasTipCap != nil) {
return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
}
// Create the transaction
var (
rawTx *types.Transaction
err error
)
if opts.GasPrice != nil {
rawTx, err = c.createLegacyTx(opts, contract, input)
} else {
// Only query for basefee if gasPrice not specified
if head, errHead := c.transactor.HeaderByNumber(ensureContext(opts.Context), nil); err != nil {
return nil, errHead
} else if head.BaseFee != nil {
rawTx, err = c.createDynamicTx(opts, contract, input, head)
} else {
// Chain is not London ready -> use legacy transaction
rawTx, err = c.createLegacyTx(opts, contract, input)
}
rawTx = types.NewTx(baseTx)
}
if err != nil {
return nil, err
}
// Sign the transaction and schedule it for execution
if opts.Signer == nil {
return nil, errors.New("no signer to authorize the transaction with")
}
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