1
0
forked from cerc-io/plugeth
plugeth/mobile/bind.go
Marius van der Wijden ed0670cb17
accounts/abi/bind: allow specifying signer on transactOpts ()
This commit enables users to specify which signer they want to use while creating their transactOpts.
Previously all contract interactions used the homestead signer. Now a user can specify whether they
want to sign with homestead or EIP155 and specify the chainID which adds another layer of security.

Closes 
2020-12-08 14:44:56 +01:00

214 lines
8.0 KiB
Go

// 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/>.
// Contains all the wrappers from the bind package.
package geth
import (
"math/big"
"strings"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// Signer is an interface defining the callback when a contract requires a
// method to sign the transaction before submission.
type Signer interface {
Sign(addr *Address, unsignedTx *Transaction) (tx *Transaction, _ error)
}
type MobileSigner struct {
sign bind.SignerFn
}
func (s *MobileSigner) Sign(addr *Address, unsignedTx *Transaction) (signedTx *Transaction, _ error) {
sig, err := s.sign(addr.address, unsignedTx.tx)
if err != nil {
return nil, err
}
return &Transaction{sig}, nil
}
// CallOpts is the collection of options to fine tune a contract call request.
type CallOpts struct {
opts bind.CallOpts
}
// NewCallOpts creates a new option set for contract calls.
func NewCallOpts() *CallOpts {
return new(CallOpts)
}
func (opts *CallOpts) IsPending() bool { return opts.opts.Pending }
func (opts *CallOpts) GetGasLimit() int64 { return 0 /* TODO(karalabe) */ }
// GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
// Even then it's awkward to unpack the subtleties of a Go context out to Java.
// func (opts *CallOpts) GetContext() *Context { return &Context{opts.opts.Context} }
func (opts *CallOpts) SetPending(pending bool) { opts.opts.Pending = pending }
func (opts *CallOpts) SetGasLimit(limit int64) { /* TODO(karalabe) */ }
func (opts *CallOpts) SetContext(context *Context) { opts.opts.Context = context.context }
func (opts *CallOpts) SetFrom(addr *Address) { opts.opts.From = addr.address }
// TransactOpts is the collection of authorization data required to create a
// valid Ethereum transaction.
type TransactOpts struct {
opts bind.TransactOpts
}
// NewTransactOpts creates a new option set for contract transaction.
func NewTransactOpts() *TransactOpts {
return new(TransactOpts)
}
// NewKeyedTransactOpts is a utility method to easily create a transaction signer
// from a single private key.
func NewKeyedTransactOpts(keyJson []byte, passphrase string, chainID *big.Int) (*TransactOpts, error) {
key, err := keystore.DecryptKey(keyJson, passphrase)
if err != nil {
return nil, err
}
auth, err := bind.NewKeyedTransactorWithChainID(key.PrivateKey, chainID)
if err != nil {
return nil, err
}
return &TransactOpts{*auth}, nil
}
func (opts *TransactOpts) GetFrom() *Address { return &Address{opts.opts.From} }
func (opts *TransactOpts) GetNonce() int64 { return opts.opts.Nonce.Int64() }
func (opts *TransactOpts) GetValue() *BigInt { return &BigInt{opts.opts.Value} }
func (opts *TransactOpts) GetGasPrice() *BigInt { return &BigInt{opts.opts.GasPrice} }
func (opts *TransactOpts) GetGasLimit() int64 { return int64(opts.opts.GasLimit) }
// GetSigner cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
// func (opts *TransactOpts) GetSigner() Signer { return &signer{opts.opts.Signer} }
// GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
// Even then it's awkward to unpack the subtleties of a Go context out to Java.
//func (opts *TransactOpts) GetContext() *Context { return &Context{opts.opts.Context} }
func (opts *TransactOpts) SetFrom(from *Address) { opts.opts.From = from.address }
func (opts *TransactOpts) SetNonce(nonce int64) { opts.opts.Nonce = big.NewInt(nonce) }
func (opts *TransactOpts) SetSigner(s Signer) {
opts.opts.Signer = func(addr common.Address, tx *types.Transaction) (*types.Transaction, error) {
sig, err := s.Sign(&Address{addr}, &Transaction{tx})
if err != nil {
return nil, err
}
return sig.tx, nil
}
}
func (opts *TransactOpts) SetValue(value *BigInt) { opts.opts.Value = value.bigint }
func (opts *TransactOpts) SetGasPrice(price *BigInt) { opts.opts.GasPrice = price.bigint }
func (opts *TransactOpts) SetGasLimit(limit int64) { opts.opts.GasLimit = uint64(limit) }
func (opts *TransactOpts) SetContext(context *Context) { opts.opts.Context = context.context }
// BoundContract is the base wrapper object that reflects a contract on the
// Ethereum network. It contains a collection of methods that are used by the
// higher level contract bindings to operate.
type BoundContract struct {
contract *bind.BoundContract
address common.Address
deployer *types.Transaction
}
// DeployContract deploys a contract onto the Ethereum blockchain and binds the
// deployment address with a wrapper.
func DeployContract(opts *TransactOpts, abiJSON string, bytecode []byte, client *EthereumClient, args *Interfaces) (contract *BoundContract, _ error) {
// Deploy the contract to the network
parsed, err := abi.JSON(strings.NewReader(abiJSON))
if err != nil {
return nil, err
}
addr, tx, bound, err := bind.DeployContract(&opts.opts, parsed, common.CopyBytes(bytecode), client.client, args.objects...)
if err != nil {
return nil, err
}
return &BoundContract{
contract: bound,
address: addr,
deployer: tx,
}, nil
}
// BindContract creates a low level contract interface through which calls and
// transactions may be made through.
func BindContract(address *Address, abiJSON string, client *EthereumClient) (contract *BoundContract, _ error) {
parsed, err := abi.JSON(strings.NewReader(abiJSON))
if err != nil {
return nil, err
}
return &BoundContract{
contract: bind.NewBoundContract(address.address, parsed, client.client, client.client, client.client),
address: address.address,
}, nil
}
func (c *BoundContract) GetAddress() *Address { return &Address{c.address} }
func (c *BoundContract) GetDeployer() *Transaction {
if c.deployer == nil {
return nil
}
return &Transaction{c.deployer}
}
// Call invokes the (constant) contract method with params as input values and
// sets the output to result.
func (c *BoundContract) Call(opts *CallOpts, out *Interfaces, method string, args *Interfaces) error {
results := make([]interface{}, len(out.objects))
copy(results, out.objects)
if err := c.contract.Call(&opts.opts, &results, method, args.objects...); err != nil {
return err
}
copy(out.objects, results)
return nil
}
// Transact invokes the (paid) contract method with params as input values.
func (c *BoundContract) Transact(opts *TransactOpts, method string, args *Interfaces) (tx *Transaction, _ error) {
rawTx, err := c.contract.Transact(&opts.opts, method, args.objects...)
if err != nil {
return nil, err
}
return &Transaction{rawTx}, nil
}
// RawTransact invokes the (paid) contract method with raw calldata as input values.
func (c *BoundContract) RawTransact(opts *TransactOpts, calldata []byte) (tx *Transaction, _ error) {
rawTx, err := c.contract.RawTransact(&opts.opts, calldata)
if err != nil {
return nil, err
}
return &Transaction{rawTx}, nil
}
// Transfer initiates a plain transaction to move funds to the contract, calling
// its default method if one is available.
func (c *BoundContract) Transfer(opts *TransactOpts) (tx *Transaction, _ error) {
rawTx, err := c.contract.Transfer(&opts.opts)
if err != nil {
return nil, err
}
return &Transaction{rawTx}, nil
}