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abigen: allow unsigned and offline transactions

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This commit is contained in:
Jim McDonald 2018-01-16 09:53:56 +00:00
parent 3f40b22dac
commit 1b9832c959
1 changed files with 13 additions and 6 deletions
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19
accounts/abi/bind/base.go
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@ -18,7 +18,6 @@ package bind
import ( import (
"context" "context"
"errors"
"fmt" "fmt"
"math/big" "math/big"
@ -44,9 +43,10 @@ type CallOpts struct {
// TransactOpts is the collection of authorization data required to create a // TransactOpts is the collection of authorization data required to create a
// valid Ethereum transaction. // valid Ethereum transaction.
type TransactOpts struct { type TransactOpts struct {
From common.Address // Ethereum account to send the transaction from From common.Address // Ethereum account to send the transaction from
Nonce *big.Int // Nonce to use for the transaction execution (nil = use pending state) Nonce *big.Int // Nonce to use for the transaction execution (nil = use pending state)
Signer SignerFn // Method to use for signing the transaction (mandatory) Signer SignerFn // Method to use for signing the transaction
DoNotSend bool // If true then return the transaction without sending it
Value *big.Int // Funds to transfer along along the transaction (nil = 0 = no funds) Value *big.Int // Funds to transfer along along the transaction (nil = 0 = no funds)
GasPrice *big.Int // Gas price to use for the transaction execution (nil = gas price oracle) GasPrice *big.Int // Gas price to use for the transaction execution (nil = gas price oracle)
@ -205,7 +205,7 @@ func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, i
return nil, fmt.Errorf("failed to estimate gas needed: %v", err) return nil, fmt.Errorf("failed to estimate gas needed: %v", err)
} }
} }
// Create the transaction, sign it and schedule it for execution // Create the transaction
var rawTx *types.Transaction var rawTx *types.Transaction
if contract == nil { if contract == nil {
rawTx = types.NewContractCreation(nonce, value, gasLimit, gasPrice, input) rawTx = types.NewContractCreation(nonce, value, gasLimit, gasPrice, input)
@ -213,12 +213,19 @@ func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, i
rawTx = types.NewTransaction(nonce, c.address, value, gasLimit, gasPrice, input) rawTx = types.NewTransaction(nonce, c.address, value, gasLimit, gasPrice, input)
} }
if opts.Signer == nil { if opts.Signer == nil {
return nil, errors.New("no signer to authorize the transaction with") return rawTx, nil
} }
// Sign the transaction
signedTx, err := opts.Signer(types.HomesteadSigner{}, opts.From, rawTx) signedTx, err := opts.Signer(types.HomesteadSigner{}, opts.From, rawTx)
if err != nil { if err != nil {
return nil, err return nil, err
} }
if opts.DoNotSend {
return signedTx, nil
}
// Send the transaction
if err := c.transactor.SendTransaction(ensureContext(opts.Context), signedTx); err != nil { if err := c.transactor.SendTransaction(ensureContext(opts.Context), signedTx); err != nil {
return nil, err return nil, err
} }