225 lines
8.3 KiB
Go
225 lines
8.3 KiB
Go
// Copyright 2016 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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// Contains all the wrappers from the bind package.
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package geth
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import (
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"errors"
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"math/big"
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"strings"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/accounts/keystore"
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"github.com/ethereum/go-ethereum/common"
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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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)
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// Signer is an interface defining the callback when a contract requires a
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// method to sign the transaction before submission.
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type Signer interface {
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Sign(*Address, *Transaction) (tx *Transaction, _ error)
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}
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type MobileSigner struct {
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sign bind.SignerFn
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}
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func (s *MobileSigner) Sign(addr *Address, unsignedTx *Transaction) (signedTx *Transaction, _ error) {
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sig, err := s.sign(types.EIP155Signer{}, addr.address, unsignedTx.tx)
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if err != nil {
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return nil, err
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}
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return &Transaction{sig}, nil
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}
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// CallOpts is the collection of options to fine tune a contract call request.
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type CallOpts struct {
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opts bind.CallOpts
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}
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// NewCallOpts creates a new option set for contract calls.
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func NewCallOpts() *CallOpts {
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return new(CallOpts)
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}
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func (opts *CallOpts) IsPending() bool { return opts.opts.Pending }
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func (opts *CallOpts) GetGasLimit() int64 { return 0 /* TODO(karalabe) */ }
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// GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
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// Even then it's awkward to unpack the subtleties of a Go context out to Java.
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// func (opts *CallOpts) GetContext() *Context { return &Context{opts.opts.Context} }
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func (opts *CallOpts) SetPending(pending bool) { opts.opts.Pending = pending }
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func (opts *CallOpts) SetGasLimit(limit int64) { /* TODO(karalabe) */ }
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func (opts *CallOpts) SetContext(context *Context) { opts.opts.Context = context.context }
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func (opts *CallOpts) SetFrom(addr *Address) { opts.opts.From = addr.address }
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// TransactOpts is the collection of authorization data required to create a
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// valid Ethereum transaction.
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type TransactOpts struct {
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opts bind.TransactOpts
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}
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// NewTransactOpts creates a new option set for contract transaction.
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func NewTransactOpts() *TransactOpts {
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return new(TransactOpts)
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}
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// NewKeyedTransactor is a utility method to easily create a transaction signer
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// from a single private key.
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func NewKeyedTransactOpts(keyJson []byte, passphrase string) (*TransactOpts, error) {
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key, err := keystore.DecryptKey(keyJson, passphrase)
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if err != nil {
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return nil, err
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}
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keyAddr := crypto.PubkeyToAddress(key.PrivateKey.PublicKey)
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opts := bind.TransactOpts{
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From: keyAddr,
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Signer: func(signer types.Signer, address common.Address, tx *types.Transaction) (*types.Transaction, error) {
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if address != keyAddr {
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return nil, errors.New("not authorized to sign this account")
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}
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signature, err := crypto.Sign(signer.Hash(tx).Bytes(), key.PrivateKey)
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if err != nil {
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return nil, err
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}
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return tx.WithSignature(signer, signature)
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},
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}
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return &TransactOpts{opts}, nil
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}
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func (opts *TransactOpts) GetFrom() *Address { return &Address{opts.opts.From} }
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func (opts *TransactOpts) GetNonce() int64 { return opts.opts.Nonce.Int64() }
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func (opts *TransactOpts) GetValue() *BigInt { return &BigInt{opts.opts.Value} }
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func (opts *TransactOpts) GetGasPrice() *BigInt { return &BigInt{opts.opts.GasPrice} }
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func (opts *TransactOpts) GetGasLimit() int64 { return int64(opts.opts.GasLimit) }
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// GetSigner cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
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// func (opts *TransactOpts) GetSigner() Signer { return &signer{opts.opts.Signer} }
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// GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
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// Even then it's awkward to unpack the subtleties of a Go context out to Java.
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//func (opts *TransactOpts) GetContext() *Context { return &Context{opts.opts.Context} }
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func (opts *TransactOpts) SetFrom(from *Address) { opts.opts.From = from.address }
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func (opts *TransactOpts) SetNonce(nonce int64) { opts.opts.Nonce = big.NewInt(nonce) }
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func (opts *TransactOpts) SetSigner(s Signer) {
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opts.opts.Signer = func(signer types.Signer, addr common.Address, tx *types.Transaction) (*types.Transaction, error) {
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sig, err := s.Sign(&Address{addr}, &Transaction{tx})
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if err != nil {
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return nil, err
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}
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return sig.tx, nil
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}
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}
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func (opts *TransactOpts) SetValue(value *BigInt) { opts.opts.Value = value.bigint }
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func (opts *TransactOpts) SetGasPrice(price *BigInt) { opts.opts.GasPrice = price.bigint }
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func (opts *TransactOpts) SetGasLimit(limit int64) { opts.opts.GasLimit = uint64(limit) }
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func (opts *TransactOpts) SetContext(context *Context) { opts.opts.Context = context.context }
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// BoundContract is the base wrapper object that reflects a contract on the
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// Ethereum network. It contains a collection of methods that are used by the
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// higher level contract bindings to operate.
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type BoundContract struct {
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contract *bind.BoundContract
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address common.Address
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deployer *types.Transaction
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}
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// DeployContract deploys a contract onto the Ethereum blockchain and binds the
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// deployment address with a wrapper.
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func DeployContract(opts *TransactOpts, abiJSON string, bytecode []byte, client *EthereumClient, args *Interfaces) (contract *BoundContract, _ error) {
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// Deploy the contract to the network
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parsed, err := abi.JSON(strings.NewReader(abiJSON))
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if err != nil {
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return nil, err
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}
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addr, tx, bound, err := bind.DeployContract(&opts.opts, parsed, common.CopyBytes(bytecode), client.client, args.objects...)
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if err != nil {
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return nil, err
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}
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return &BoundContract{
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contract: bound,
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address: addr,
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deployer: tx,
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}, nil
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}
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// BindContract creates a low level contract interface through which calls and
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// transactions may be made through.
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func BindContract(address *Address, abiJSON string, client *EthereumClient) (contract *BoundContract, _ error) {
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parsed, err := abi.JSON(strings.NewReader(abiJSON))
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if err != nil {
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return nil, err
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}
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return &BoundContract{
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contract: bind.NewBoundContract(address.address, parsed, client.client, client.client, client.client),
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address: address.address,
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}, nil
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}
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func (c *BoundContract) GetAddress() *Address { return &Address{c.address} }
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func (c *BoundContract) GetDeployer() *Transaction {
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if c.deployer == nil {
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return nil
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}
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return &Transaction{c.deployer}
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}
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// Call invokes the (constant) contract method with params as input values and
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// sets the output to result.
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func (c *BoundContract) Call(opts *CallOpts, out *Interfaces, method string, args *Interfaces) error {
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if len(out.objects) == 1 {
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result := out.objects[0]
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if err := c.contract.Call(&opts.opts, result, method, args.objects...); err != nil {
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return err
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}
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out.objects[0] = result
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} else {
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results := make([]interface{}, len(out.objects))
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copy(results, out.objects)
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if err := c.contract.Call(&opts.opts, &results, method, args.objects...); err != nil {
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return err
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}
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copy(out.objects, results)
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}
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return nil
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}
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// Transact invokes the (paid) contract method with params as input values.
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func (c *BoundContract) Transact(opts *TransactOpts, method string, args *Interfaces) (tx *Transaction, _ error) {
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rawTx, err := c.contract.Transact(&opts.opts, method, args.objects...)
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if err != nil {
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return nil, err
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}
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return &Transaction{rawTx}, nil
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}
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// Transfer initiates a plain transaction to move funds to the contract, calling
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// its default method if one is available.
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func (c *BoundContract) Transfer(opts *TransactOpts) (tx *Transaction, _ error) {
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rawTx, err := c.contract.Transfer(&opts.opts)
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if err != nil {
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return nil, err
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}
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return &Transaction{rawTx}, nil
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}
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