WIP: Generating transaction on Send tab (Pt 1) (#100)

* Generating transaction ,placing into read only textareas.

* Fix async wallet getAddress cases.

* Chain id from network

* remove leftover console log

* Check balance before generating transaction.

* Translate error msgs, check for invalid address.

* Errors for gas limit and gas price issues.

common/components/BalanceSidebar/BalanceSidebar.jsx

@@ -33,7 +33,6 @@ export class BalanceSidebar extends React.Component {
   };
 
   componentDidMount() {
-    if (!this.props.wallet) return;
     this.props.wallet
       .getAddress()
       .then(addr => {
@@ -48,6 +47,7 @@ export class BalanceSidebar extends React.Component {
   render() {
     const { wallet, balance, network, tokenBalances, rates } = this.props;
     const { blockExplorer, tokenExplorer } = network;
+    const { address } = this.state;
     if (!wallet) {
       return null;
     }
@@ -58,9 +58,9 @@ export class BalanceSidebar extends React.Component {
           {translate('sidebar_AccountAddr')}
         </h5>
         <ul className="account-info">
-          <Identicon address={this.state.address} />
+          <Identicon address={address} />
           <span className="mono wrap">
-            {this.state.address}
+            {address}
           </span>
         </ul>
         <hr />
@@ -96,10 +96,7 @@ export class BalanceSidebar extends React.Component {
               {!!blockExplorer &&
                 <li>
                   <a
-                    href={blockExplorer.address.replace(
-                      '[[address]]',
-                      this.state.address
-                    )}
+                    href={blockExplorer.address.replace('[[address]]', address)}
                     target="_blank"
                   >
                     {`${network.name} (${blockExplorer.name})`}
@@ -108,10 +105,7 @@ export class BalanceSidebar extends React.Component {
               {!!tokenExplorer &&
                 <li>
                   <a
-                    href={tokenExplorer.address.replace(
-                      '[[address]]',
-                      this.state.address
-                    )}
+                    href={tokenExplorer.address.replace('[[address]]', address)}
                     target="_blank"
                   >
                     {`Tokens (${tokenExplorer.name})`}
@@ -187,7 +181,7 @@ export class BalanceSidebar extends React.Component {
   };
 }
 
-function mapStateToProps(state: State, props: Props) {
+function mapStateToProps(state: State) {
   return {
     wallet: getWalletInst(state),
     balance: state.wallet.balance,

common/components/Header/components/GasPriceDropdown.jsx

@@ -75,6 +75,6 @@ export default class GasPriceDropdown extends Component {
   };
 
   updateGasPrice = (e: SyntheticInputEvent) => {
-    this.props.onChange(e.currentTarget.valueAsNumber);
+    this.props.onChange(parseInt(e.target.value, 10));
   };
 }

common/containers/Tabs/SendTransaction/components/UnitDropdown.jsx

@@ -79,6 +79,9 @@ export default class UnitDropdown extends React.Component {
     this.setState({
       expanded: false
     });
+
+    if (this.props.onChange) {
       this.props.onChange(value);
+    }
   };
 }

common/containers/Tabs/SendTransaction/index.jsx

@@ -1,7 +1,6 @@
 // @flow
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import translate from 'translations';
 import { UnlockHeader } from 'components/ui';
 import {
@@ -21,27 +20,40 @@ import BaseWallet from 'libs/wallet/base';
 import customMessages from './messages';
 import { donationAddressMap } from 'config/data';
 import { isValidETHAddress } from 'libs/validators';
-import { getNodeLib } from 'selectors/config';
+import {
+  getNodeLib,
+  getNetworkConfig,
+  getGasPriceGwei
+} from 'selectors/config';
 import { getTokens } from 'selectors/wallet';
-import type { BaseNode } from 'libs/nodes';
-import type { Token } from 'config/data';
+import type { Token, NetworkConfig } from 'config/data';
 import Big from 'bignumber.js';
 import { valueToHex } from 'libs/values';
 import ERC20 from 'libs/erc20';
 import type { TokenBalance } from 'selectors/wallet';
 import { getTokenBalances } from 'selectors/wallet';
-import type { TransactionWithoutGas } from 'libs/transaction';
+import type { RPCNode } from 'libs/nodes';
+import type {
+  TransactionWithoutGas,
+  BroadcastTransaction
+} from 'libs/transaction';
+import type { UNIT } from 'libs/units';
+import { toWei } from 'libs/units';
 import { formatGasLimit } from 'utils/formatters';
+import { showNotification } from 'actions/notifications';
+import type { ShowNotificationAction } from 'actions/notifications';
 
 type State = {
   hasQueryString: boolean,
   readOnly: boolean,
   to: string,
   value: string,
-  unit: string,
+  // $FlowFixMe - Comes from getParam not validating unit
+  unit: UNIT,
   gasLimit: string,
   data: string,
-  gasChanged: boolean
+  gasChanged: boolean,
+  transaction: ?BroadcastTransaction
 };
 
 function getParam(query: { [string]: string }, key: string) {
@@ -65,9 +77,16 @@ type Props = {
   },
   wallet: BaseWallet,
   balance: Big,
-  node: BaseNode,
+  nodeLib: RPCNode,
+  network: NetworkConfig,
   tokens: Token[],
-  tokenBalances: TokenBalance[]
+  tokenBalances: TokenBalance[],
+  gasPrice: number,
+  showNotification: (
+    level: string,
+    msg: string,
+    duration?: number
+  ) => ShowNotificationAction
 };
 
 export class SendTransaction extends React.Component {
@@ -81,7 +100,8 @@ export class SendTransaction extends React.Component {
     unit: 'ether',
     gasLimit: '21000',
     data: '',
-    gasChanged: false
+    gasChanged: false,
+    transaction: null
   };
 
   componentDidMount() {
@@ -112,8 +132,6 @@ export class SendTransaction extends React.Component {
 
   render() {
     const unlocked = !!this.props.wallet;
-    const unitReadable = 'UNITREADABLE';
-    const nodeUnit = 'NODEUNIT';
     const hasEnoughBalance = false;
     const {
       to,
@@ -122,7 +140,8 @@ export class SendTransaction extends React.Component {
       gasLimit,
       data,
       readOnly,
-      hasQueryString
+      hasQueryString,
+      transaction
     } = this.state;
     const customMessage = customMessages.find(m => m.to === to);
 
@@ -213,17 +232,23 @@ export class SendTransaction extends React.Component {
                       <label>
                         {translate('SEND_raw')}
                       </label>
-                      <textarea className="form-control" rows="4" readOnly>
-                        {'' /*rawTx*/}
-                      </textarea>
+                      <textarea
+                        className="form-control"
+                        value={transaction ? transaction.rawTx : ''}
+                        rows="4"
+                        readOnly
+                      />
                     </div>
                     <div className="col-sm-6">
                       <label>
                         {translate('SEND_signed')}
                       </label>
-                      <textarea className="form-control" rows="4" readOnly>
-                        {'' /*signedTx*/}
-                      </textarea>
+                      <textarea
+                        className="form-control"
+                        value={transaction ? transaction.signedTx : ''}
+                        rows="4"
+                        readOnly
+                      />
                     </div>
                   </div>
 
@@ -279,26 +304,24 @@ export class SendTransaction extends React.Component {
     );
   }
 
-  // FIXME MOVE ME
-  getTransactionFromState(): ?TransactionWithoutGas {
-    // FIXME add gas price
+  async getTransactionFromState(): Promise<TransactionWithoutGas> {
+    const { wallet } = this.props;
+
     if (this.state.unit === 'ether') {
       return {
         to: this.state.to,
-        from: this.props.wallet.getAddress(),
-        // gasPrice: `0x${new Number(50 * 1000000000).toString(16)}`,
+        from: await wallet.getAddress(),
         value: valueToHex(this.state.value)
       };
     }
     const token = this.props.tokens.find(x => x.symbol === this.state.unit);
     if (!token) {
-      return;
+      throw new Error('No matching token');
     }
 
     return {
       to: token.address,
-      from: this.props.wallet.getAddress(),
-      // gasPrice: `0x${new Number(50 * 1000000000).toString(16)}`,
+      from: await wallet.getAddress(),
       value: '0x0',
       data: ERC20.transfer(
         this.state.to,
@@ -307,8 +330,8 @@ export class SendTransaction extends React.Component {
     };
   }
 
-  estimateGas() {
-    const trans = this.getTransactionFromState();
+  async estimateGas() {
+    const trans = await this.getTransactionFromState();
     if (!trans) {
       return;
     }
@@ -317,7 +340,7 @@ export class SendTransaction extends React.Component {
     // call comes back, we don't want to replace the gasLimit in state.
     const state = this.state;
 
-    this.props.node.estimateGas(trans).then(gasLimit => {
+    this.props.nodeLib.estimateGas(trans).then(gasLimit => {
       if (this.state === state) {
         this.setState({ gasLimit: formatGasLimit(gasLimit, state.unit) });
       }
@@ -381,16 +404,42 @@ export class SendTransaction extends React.Component {
       unit
     });
   };
+
+  generateTx = async () => {
+    const { nodeLib, wallet } = this.props;
+    const address = await wallet.getAddress();
+
+    try {
+      const transaction = await nodeLib.generateTransaction(
+        {
+          to: this.state.to,
+          from: address,
+          value: this.state.value,
+          gasLimit: this.state.gasLimit,
+          gasPrice: this.props.gasPrice,
+          data: this.state.data,
+          chainId: this.props.network.chainId
+        },
+        wallet
+      );
+
+      this.setState({ transaction });
+    } catch (err) {
+      this.props.showNotification('danger', err.message, 5000);
+    }
+  };
 }
 
 function mapStateToProps(state: AppState) {
   return {
     wallet: state.wallet.inst,
     balance: state.wallet.balance,
-    node: getNodeLib(state),
+    tokenBalances: getTokenBalances(state),
+    nodeLib: getNodeLib(state),
+    network: getNetworkConfig(state),
     tokens: getTokens(state),
-    tokenBalances: getTokenBalances(state)
+    gasPrice: toWei(new Big(getGasPriceGwei(state)), 'gwei')
   };
 }
 
-export default connect(mapStateToProps)(SendTransaction);
+export default connect(mapStateToProps, { showNotification })(SendTransaction);

common/libs/nodes/base.js

@@ -1,7 +1,12 @@
 // @flow
 import Big from 'bignumber.js';
-import type { TransactionWithoutGas } from 'libs/transaction';
+import type {
+  TransactionWithoutGas,
+  Transaction,
+  BroadcastTransaction
+} from 'libs/transaction';
 import type { Token } from 'config/data';
+import type { BaseWallet } from 'libs/wallet';
 
 export default class BaseNode {
   async getBalance(_address: string): Promise<Big> {
@@ -15,4 +20,11 @@ export default class BaseNode {
   async estimateGas(_tx: TransactionWithoutGas): Promise<Big> {
     throw new Error('Implement me');
   }
+
+  async generateTransaction(
+    _tx: Transaction,
+    _wallet: BaseWallet
+  ): Promise<BroadcastTransaction> {
+    throw new Error('Implement me');
+  }
 }

common/libs/nodes/rpc/client.js

@@ -6,7 +6,8 @@ import type {
   JsonRpcResponse,
   CallRequest,
   GetBalanceRequest,
-  EstimateGasRequest
+  EstimateGasRequest,
+  GetTransactionCountRequest
 } from './types';
 
 // FIXME is it safe to generate that much entropy?
@@ -41,6 +42,17 @@ export function ethCall<T: *>(transaction: T): CallRequest {
   };
 }
 
+export function getTransactionCount(
+  address: string
+): GetTransactionCountRequest {
+  return {
+    id: id(),
+    jsonrpc: '2.0',
+    method: 'eth_getTransactionCount',
+    params: [address, 'pending']
+  };
+}
+
 export default class RPCClient {
   endpoint: string;
   constructor(endpoint: string) {

common/libs/nodes/rpc/index.js

@@ -1,10 +1,24 @@
 // @flow
 import Big from 'bignumber.js';
+import { addHexPrefix } from 'ethereumjs-util';
+import translate from 'translations';
 import BaseNode from '../base';
-import type { TransactionWithoutGas } from 'libs/transaction';
-import RPCClient, { getBalance, estimateGas, ethCall } from './client';
+import type {
+  TransactionWithoutGas,
+  Transaction,
+  BroadcastTransaction
+} from 'libs/transaction';
+import RPCClient, {
+  getBalance,
+  estimateGas,
+  ethCall,
+  getTransactionCount
+} from './client';
 import type { Token } from 'config/data';
 import ERC20 from 'libs/erc20';
+import type { BaseWallet } from 'libs/wallet';
+import { toWei } from 'libs/units';
+import { isValidETHAddress } from 'libs/validators';
 
 export default class RpcNode extends BaseNode {
   client: RPCClient;
@@ -48,8 +62,94 @@ export default class RpcNode extends BaseNode {
           if (item.error) {
             return new Big(0);
           }
-          return new Big(Number(item.result)).div(new Big(10).pow(tokens[idx].decimal));
+          return new Big(Number(item.result)).div(
+            new Big(10).pow(tokens[idx].decimal)
+          );
         });
       });
   }
+
+  async generateTransaction(
+    tx: Transaction,
+    wallet: BaseWallet
+  ): Promise<BroadcastTransaction> {
+    // Reject bad addresses
+    if (!isValidETHAddress(tx.to)) {
+      return Promise.reject(new Error(translate('ERROR_5')));
+    }
+
+    // Reject gas limit under 21000 (Minimum for transaction)
+    // Reject if limit over 5000000
+    // TODO: Make this dynamic, the limit shifts
+    const limitBig = new Big(tx.gasLimit);
+    if (limitBig.lessThan(21000)) {
+      return Promise.reject(
+        new Error(
+          translate('Gas limit must be at least 21000 for transactions')
+        )
+      );
+    }
+
+    if (limitBig.greaterThan(5000000)) {
+      return Promise.reject(new Error(translate('GETH_GasLimit')));
+    }
+
+    // Reject gas over 1000gwei (1000000000000)
+    const priceBig = new Big(tx.gasPrice);
+    if (priceBig.greaterThan(new Big('1000000000000'))) {
+      return Promise.reject(
+        new Error(
+          'Gas price too high. Please contact support if this was not a mistake.'
+        )
+      );
+    }
+
+    const calls = [getBalance(tx.from), getTransactionCount(tx.from)];
+
+    return this.client.batch(calls).then(async results => {
+      const [balance, txCount] = results;
+
+      if (balance.error) {
+        throw new Error(`Failed to retrieve balance for ${tx.from}`);
+      }
+
+      if (txCount.error) {
+        throw new Error(`Failed to retrieve transaction count for ${tx.from}`);
+      }
+
+      // TODO: Handle token values
+      const valueWei = new Big(toWei(new Big(tx.value), 'ether'));
+      const balanceWei = new Big(balance.result);
+      if (valueWei.gte(balanceWei)) {
+        throw new Error(translate('GETH_Balance'));
+      }
+
+      const rawTx = {
+        nonce: addHexPrefix(txCount.result),
+        gasPrice: addHexPrefix(new Big(tx.gasPrice).toString(16)),
+        gasLimit: addHexPrefix(new Big(tx.gasLimit).toString(16)),
+        to: addHexPrefix(tx.to),
+        value: addHexPrefix(valueWei.toString(16)),
+        data: tx.data ? addHexPrefix(tx.data) : '',
+        chainId: tx.chainId || 1
+      };
+
+      const rawTxJson = JSON.stringify(rawTx);
+      const signedTx = await wallet.signRawTransaction(rawTx);
+
+      // Repeat all of this shit for Flow typechecking. Sealed objects don't
+      // like spreads, so we have to be explicit.
+      return {
+        nonce: rawTx.nonce,
+        gasPrice: rawTx.gasPrice,
+        gasLimit: rawTx.gasLimit,
+        to: rawTx.to,
+        value: rawTx.value,
+        data: rawTx.data,
+        chainId: rawTx.chainId,
+        rawTx: rawTxJson,
+        signedTx: signedTx
+      };
+    });
+  }
 }

common/libs/nodes/rpc/types.js

@@ -59,4 +59,13 @@ export type EstimateGasRequest = RPCRequestBase & {
   ]
 };
 
-export type RPCRequest = GetBalanceRequest | CallRequest | EstimateGasRequest;
+export type GetTransactionCountRequest = RPCRequestBase & {
+  method: 'eth_getTransactionCount',
+  params: [DATA, DEFAULT_BLOCK]
+};
+
+export type RPCRequest =
+  | GetBalanceRequest
+  | CallRequest
+  | EstimateGasRequest
+  | GetTransactionCountRequest;

common/libs/signing.js

@@ -3,9 +3,12 @@
 import EthTx from 'ethereumjs-tx';
 import { sha3, ecsign } from 'ethereumjs-util';
 import { isValidRawTx } from 'libs/validators';
-import type { RawTx } from 'libs/validators';
+import type { RawTransaction } from 'libs/transaction';
 
-export function signRawTxWithPrivKey(privKey: Buffer, rawTx: RawTx): string {
+export function signRawTxWithPrivKey(
+  privKey: Buffer,
+  rawTx: RawTransaction
+): string {
   if (!isValidRawTx(rawTx)) {
     throw new Error('Invalid raw transaction');
   }

common/libs/transaction.js

@@ -1,14 +1,31 @@
 // @flow
 
 export type TransactionWithoutGas = {|
-  from?: string,
+  from: string,
   to: string,
-  gasPrice?: string,
-  value?: string,
-  data?: string
+  gasLimit?: string | number,
+  value: string | number,
+  data?: string,
+  chainId?: number
 |};
 
 export type Transaction = {|
   ...TransactionWithoutGas,
-  gas: string
+  gasPrice: string | number
+|};
+
+export type RawTransaction = {|
+  nonce: string,
+  gasPrice: string,
+  gasLimit: string,
+  to: string,
+  value: string,
+  data: string,
+  chainId: number
+|};
+
+export type BroadcastTransaction = {|
+  ...RawTransaction,
+  rawTx: string,
+  signedTx: string
 |};

common/libs/units.js

@@ -29,7 +29,7 @@ const UNITS = {
   tether: '1000000000000000000000000000000'
 };
 
-type UNIT = $Keys<typeof UNITS>;
+export type UNIT = $Keys<typeof UNITS>;
 
 function getValueOfUnit(unit: UNIT) {
   return new Big(UNITS[unit]);

common/libs/validators.js

@@ -2,6 +2,7 @@
 import WalletAddressValidator from 'wallet-address-validator';
 import { normalise } from './ens';
 import { toChecksumAddress } from 'ethereumjs-util';
+import type { RawTransaction } from 'libs/transaction';
 
 export function isValidETHAddress(address: string): boolean {
   if (!address) {
@@ -85,17 +86,7 @@ export function isPositiveIntegerOrZero(number: number): boolean {
   return number >= 0 && parseInt(number) === number;
 }
 
-export type RawTx = {
-  nonce: string,
-  gasPrice: string,
-  gasLimit: string,
-  to: string,
-  value: string,
-  data: string,
-  chainId: number
-};
-
-export function isValidRawTx(rawTx: RawTx): boolean {
+export function isValidRawTx(rawTx: RawTransaction): boolean {
   const propReqs = [
     { name: 'nonce', type: 'string', lenReq: true },
     { name: 'gasPrice', type: 'string', lenReq: true },

common/libs/wallet/base.js

@@ -1,16 +1,21 @@
 // @flow
 import { stripHex } from 'libs/values';
+import type { RawTransaction } from 'libs/transaction';
 
 export default class BaseWallet {
-  getAddress(): Promise<any> {
+  getAddress(): Promise<string> {
     return Promise.reject('Implement me');
   }
 
-  getNakedAddress(): Promise<any> {
+  getNakedAddress(): Promise<string> {
     return new Promise(resolve => {
       this.getAddress().then(address => {
         resolve(stripHex(address));
       });
     });
   }
+
+  signRawTransaction(_tx: RawTransaction): Promise<string> {
+    return Promise.reject('Implement me');
+  }
 }

common/libs/wallet/privkey.js

@@ -8,7 +8,7 @@ import {
 import { randomBytes } from 'crypto';
 import { pkeyToKeystore } from 'libs/keystore';
 import { signRawTxWithPrivKey, signMessageWithPrivKey } from 'libs/signing';
-import type { RawTx } from 'libs/validators';
+import type { RawTransaction } from 'libs/transaction';
 
 export default class PrivKeyWallet extends BaseWallet {
   privKey: Buffer;
@@ -21,7 +21,7 @@ export default class PrivKeyWallet extends BaseWallet {
     this.address = publicToAddress(this.pubKey);
   }
 
-  getAddress(): Promise<any> {
+  getAddress(): Promise<string> {
     return Promise.resolve(
       toChecksumAddress(`0x${this.address.toString('hex')}`)
     );
@@ -47,7 +47,7 @@ export default class PrivKeyWallet extends BaseWallet {
     return Promise.resolve();
   }
 
-  signRawTransaction(rawTx: RawTx): Promise<any> {
+  signRawTransaction(rawTx: RawTransaction): Promise<string> {
     return new Promise((resolve, reject) => {
       try {
         resolve(signRawTxWithPrivKey(this.privKey, rawTx));

common/selectors/config.js

@@ -19,3 +19,7 @@ export function getNetworkConfig(state: State): NetworkConfig {
 export function getNetworkContracts(state: State): ?Array<NetworkContract> {
   return getNetworkConfig(state).contracts;
 }
+
+export function getGasPriceGwei(state: State): number {
+  return state.config.gasPriceGwei;
+}

package-lock.json

@@ -3771,6 +3771,20 @@
     "ethereum-blockies": {
       "version": "git+https://github.com/MyEtherWallet/blockies.git#c0d0b782e77e17228f6fe1c387b956987e45b670"
     },
+    "ethereum-common": {
+      "version": "0.0.18",
+      "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.0.18.tgz",
+      "integrity": "sha1-L9w1dvIykDNYl26znaeDIT/5Uj8="
+    },
+    "ethereumjs-tx": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/ethereumjs-tx/-/ethereumjs-tx-1.3.3.tgz",
+      "integrity": "sha1-7OBR0+/b53GtKlGNYWMsoqt17Ls=",
+      "requires": {
+        "ethereum-common": "0.0.18",
+        "ethereumjs-util": "5.1.2"
+      }
+    },
     "ethereumjs-util": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.1.2.tgz",

spec/libs/validators.spec.js

@@ -2,24 +2,26 @@ import {
   isValidBTCAddress,
   isValidETHAddress
 } from '../../common/libs/validators';
-import { donationAddressMap } from '../../common/config/data';
+
+const VALID_BTC_ADDRESS = '1MEWT2SGbqtz6mPCgFcnea8XmWV5Z4Wc6';
+const VALID_ETH_ADDRESS = '0x7cB57B5A97eAbe94205C07890BE4c1aD31E486A8';
 
 describe('Validator', () => {
   it('should validate correct BTC address as true', () => {
-    expect(isValidBTCAddress(donationAddressMap.BTC)).toBeTruthy();
+    expect(isValidBTCAddress(VALID_BTC_ADDRESS)).toBeTruthy();
   });
   it('should validate incorrect BTC address as false', () => {
     expect(
-      isValidBTCAddress('nonsense' + donationAddressMap.BTC + 'nonsense')
+      isValidBTCAddress('nonsense' + VALID_BTC_ADDRESS + 'nonsense')
     ).toBeFalsy();
   });
 
   it('should validate correct ETH address as true', () => {
-    expect(isValidETHAddress(donationAddressMap.ETH)).toBeTruthy();
+    expect(isValidETHAddress(VALID_ETH_ADDRESS)).toBeTruthy();
   });
   it('should validate incorrect ETH address as false', () => {
     expect(
-      isValidETHAddress('nonsense' + donationAddressMap.ETH + 'nonsense')
+      isValidETHAddress('nonsense' + VALID_ETH_ADDRESS + 'nonsense')
     ).toBeFalsy();
   });
 });