github.com/bigzoro/my_simplechain@v0.0.0-20240315012955-8ad0a2a29bb9/mobile/bind.go (about) 1 // Copyright 2016 The go-simplechain Authors 2 // This file is part of the go-simplechain library. 3 // 4 // The go-simplechain library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-simplechain library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-simplechain library. If not, see <http://www.gnu.org/licenses/>. 16 17 // Contains all the wrappers from the bind package. 18 19 package geth 20 21 import ( 22 "errors" 23 "math/big" 24 "strings" 25 26 "github.com/bigzoro/my_simplechain/accounts/abi" 27 "github.com/bigzoro/my_simplechain/accounts/abi/bind" 28 "github.com/bigzoro/my_simplechain/accounts/keystore" 29 "github.com/bigzoro/my_simplechain/common" 30 "github.com/bigzoro/my_simplechain/core/types" 31 "github.com/bigzoro/my_simplechain/crypto" 32 ) 33 34 // Signer is an interface defining the callback when a contract requires a 35 // method to sign the transaction before submission. 36 type Signer interface { 37 Sign(*Address, *Transaction) (tx *Transaction, _ error) 38 } 39 40 type MobileSigner struct { 41 sign bind.SignerFn 42 } 43 44 func (s *MobileSigner) Sign(addr *Address, unsignedTx *Transaction) (signedTx *Transaction, _ error) { 45 sig, err := s.sign(addr.address, unsignedTx.tx) 46 if err != nil { 47 return nil, err 48 } 49 return &Transaction{sig}, nil 50 } 51 52 // CallOpts is the collection of options to fine tune a contract call request. 53 type CallOpts struct { 54 opts bind.CallOpts 55 } 56 57 // NewCallOpts creates a new option set for contract calls. 58 func NewCallOpts() *CallOpts { 59 return new(CallOpts) 60 } 61 62 func (opts *CallOpts) IsPending() bool { return opts.opts.Pending } 63 func (opts *CallOpts) GetGasLimit() int64 { return 0 /* TODO(karalabe) */ } 64 65 // GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876) 66 // Even then it's awkward to unpack the subtleties of a Go context out to Java. 67 // func (opts *CallOpts) GetContext() *Context { return &Context{opts.opts.Context} } 68 69 func (opts *CallOpts) SetPending(pending bool) { opts.opts.Pending = pending } 70 func (opts *CallOpts) SetGasLimit(limit int64) { /* TODO(karalabe) */ } 71 func (opts *CallOpts) SetContext(context *Context) { opts.opts.Context = context.context } 72 73 // TransactOpts is the collection of authorization data required to create a 74 // valid Ethereum transaction. 75 type TransactOpts struct { 76 opts bind.TransactOpts 77 } 78 79 // NewTransactOpts creates a new option set for contract transaction. 80 func NewTransactOpts() *TransactOpts { 81 return new(TransactOpts) 82 } 83 84 // NewKeyedTransactor is a utility method to easily create a transaction signer 85 // from a single private key. 86 func NewKeyedTransactOpts(keyJson []byte, passphrase string) (*TransactOpts, error) { 87 key, err := keystore.DecryptKey(keyJson, passphrase) 88 if err != nil { 89 return nil, err 90 } 91 signer := types.HomesteadSigner{} 92 keyAddr := crypto.PubkeyToAddress(key.PrivateKey.PublicKey) 93 opts := bind.TransactOpts{ 94 From: keyAddr, 95 Signer: func(address common.Address, tx *types.Transaction) (*types.Transaction, error) { 96 if address != keyAddr { 97 return nil, errors.New("not authorized to sign this account") 98 } 99 signature, err := crypto.Sign(signer.Hash(tx).Bytes(), key.PrivateKey) 100 if err != nil { 101 return nil, err 102 } 103 return tx.WithSignature(signer, signature) 104 }, 105 } 106 return &TransactOpts{opts}, nil 107 } 108 109 func (opts *TransactOpts) GetFrom() *Address { return &Address{opts.opts.From} } 110 func (opts *TransactOpts) GetNonce() int64 { return opts.opts.Nonce.Int64() } 111 func (opts *TransactOpts) GetValue() *BigInt { return &BigInt{opts.opts.Value} } 112 func (opts *TransactOpts) GetGasPrice() *BigInt { return &BigInt{opts.opts.GasPrice} } 113 func (opts *TransactOpts) GetGasLimit() int64 { return int64(opts.opts.GasLimit) } 114 115 // GetSigner cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876) 116 // func (opts *TransactOpts) GetSigner() Signer { return &signer{opts.opts.Signer} } 117 118 // GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876) 119 // Even then it's awkward to unpack the subtleties of a Go context out to Java. 120 //func (opts *TransactOpts) GetContext() *Context { return &Context{opts.opts.Context} } 121 122 func (opts *TransactOpts) SetFrom(from *Address) { opts.opts.From = from.address } 123 func (opts *TransactOpts) SetNonce(nonce int64) { opts.opts.Nonce = big.NewInt(nonce) } 124 func (opts *TransactOpts) SetSigner(s Signer) { 125 opts.opts.Signer = func(addr common.Address, tx *types.Transaction) (*types.Transaction, error) { 126 sig, err := s.Sign(&Address{addr}, &Transaction{tx}) 127 if err != nil { 128 return nil, err 129 } 130 return sig.tx, nil 131 } 132 } 133 func (opts *TransactOpts) SetValue(value *BigInt) { opts.opts.Value = value.bigint } 134 func (opts *TransactOpts) SetGasPrice(price *BigInt) { opts.opts.GasPrice = price.bigint } 135 func (opts *TransactOpts) SetGasLimit(limit int64) { opts.opts.GasLimit = uint64(limit) } 136 func (opts *TransactOpts) SetContext(context *Context) { opts.opts.Context = context.context } 137 138 // BoundContract is the base wrapper object that reflects a contract on the 139 // Ethereum network. It contains a collection of methods that are used by the 140 // higher level contract bindings to operate. 141 type BoundContract struct { 142 contract *bind.BoundContract 143 address common.Address 144 deployer *types.Transaction 145 } 146 147 // DeployContract deploys a contract onto the Ethereum blockchain and binds the 148 // deployment address with a wrapper. 149 func DeployContract(opts *TransactOpts, abiJSON string, bytecode []byte, client *EthereumClient, args *Interfaces) (contract *BoundContract, _ error) { 150 // Deploy the contract to the network 151 parsed, err := abi.JSON(strings.NewReader(abiJSON)) 152 if err != nil { 153 return nil, err 154 } 155 addr, tx, bound, err := bind.DeployContract(&opts.opts, parsed, common.CopyBytes(bytecode), client.client, args.objects...) 156 if err != nil { 157 return nil, err 158 } 159 return &BoundContract{ 160 contract: bound, 161 address: addr, 162 deployer: tx, 163 }, nil 164 } 165 166 // BindContract creates a low level contract interface through which calls and 167 // transactions may be made through. 168 func BindContract(address *Address, abiJSON string, client *EthereumClient) (contract *BoundContract, _ error) { 169 parsed, err := abi.JSON(strings.NewReader(abiJSON)) 170 if err != nil { 171 return nil, err 172 } 173 return &BoundContract{ 174 contract: bind.NewBoundContract(address.address, parsed, client.client, client.client, client.client), 175 address: address.address, 176 }, nil 177 } 178 179 func (c *BoundContract) GetAddress() *Address { return &Address{c.address} } 180 func (c *BoundContract) GetDeployer() *Transaction { 181 if c.deployer == nil { 182 return nil 183 } 184 return &Transaction{c.deployer} 185 } 186 187 // Call invokes the (constant) contract method with params as input values and 188 // sets the output to result. 189 func (c *BoundContract) Call(opts *CallOpts, out *Interfaces, method string, args *Interfaces) error { 190 results := make([]interface{}, len(out.objects)) 191 copy(results, out.objects) 192 if err := c.contract.Call(&opts.opts, &results, method, args.objects...); err != nil { 193 return err 194 } 195 copy(out.objects, results) 196 return nil 197 } 198 199 // Transact invokes the (paid) contract method with params as input values. 200 func (c *BoundContract) Transact(opts *TransactOpts, method string, args *Interfaces) (tx *Transaction, _ error) { 201 rawTx, err := c.contract.Transact(&opts.opts, method, args.objects...) 202 if err != nil { 203 return nil, err 204 } 205 return &Transaction{rawTx}, nil 206 } 207 208 // Transfer initiates a plain transaction to move funds to the contract, calling 209 // its default method if one is available. 210 func (c *BoundContract) Transfer(opts *TransactOpts) (tx *Transaction, _ error) { 211 rawTx, err := c.contract.Transfer(&opts.opts) 212 if err != nil { 213 return nil, err 214 } 215 return &Transaction{rawTx}, nil 216 }