461 lines
17 KiB
TypeScript
461 lines
17 KiB
TypeScript
"use strict";
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// See: https://github.com/ethereum/wiki/wiki/JSON-RPC
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import { Provider, TransactionRequest, TransactionResponse } from "@ethersproject/abstract-provider";
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import { Signer } from "@ethersproject/abstract-signer";
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import { BigNumber } from "@ethersproject/bignumber";
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import { Bytes, hexlify, hexValue } from "@ethersproject/bytes";
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import { getNetwork, Network, Networkish } from "@ethersproject/networks";
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import { checkProperties, deepCopy, defineReadOnly, resolveProperties, shallowCopy } from "@ethersproject/properties";
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import { toUtf8Bytes } from "@ethersproject/strings";
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import { ConnectionInfo, fetchJson, poll } from "@ethersproject/web";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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import { BaseProvider } from "./base-provider";
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function timer(timeout: number): Promise<any> {
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return new Promise(function(resolve) {
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setTimeout(function() {
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resolve();
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}, timeout);
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});
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}
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function getResult(payload: { error?: { code?: number, data?: any, message?: string }, result?: any }): any {
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if (payload.error) {
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// @TODO: not any
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let error: any = new Error(payload.error.message);
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error.code = payload.error.code;
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error.data = payload.error.data;
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throw error;
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}
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return payload.result;
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}
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function getLowerCase(value: string): string {
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if (value) { return value.toLowerCase(); }
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return value;
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}
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const _constructorGuard = {};
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export class JsonRpcSigner extends Signer {
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readonly provider: JsonRpcProvider;
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_index: number;
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_address: string;
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constructor(constructorGuard: any, provider: JsonRpcProvider, addressOrIndex?: string | number) {
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logger.checkNew(new.target, JsonRpcSigner);
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super();
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if (constructorGuard !== _constructorGuard) {
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throw new Error("do not call the JsonRpcSigner constructor directly; use provider.getSigner");
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}
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defineReadOnly(this, "provider", provider);
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if (addressOrIndex == null) { addressOrIndex = 0; }
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if (typeof(addressOrIndex) === "string") {
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defineReadOnly(this, "_address", this.provider.formatter.address(addressOrIndex));
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defineReadOnly(this, "_index", null);
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} else if (typeof(addressOrIndex) === "number") {
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defineReadOnly(this, "_index", addressOrIndex);
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defineReadOnly(this, "_address", null);
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} else {
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logger.throwArgumentError("invalid address or index", "addressOrIndex", addressOrIndex);
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}
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}
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connect(provider: Provider): JsonRpcSigner {
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return logger.throwError("cannot alter JSON-RPC Signer connection", Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "connect"
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});
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}
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connectUnchecked(): JsonRpcSigner {
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return new UncheckedJsonRpcSigner(_constructorGuard, this.provider, this._address || this._index);
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}
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getAddress(): Promise<string> {
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if (this._address) {
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return Promise.resolve(this._address);
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}
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return this.provider.send("eth_accounts", []).then((accounts) => {
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if (accounts.length <= this._index) {
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logger.throwError("unknown account #" + this._index, Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "getAddress"
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});
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}
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return this.provider.formatter.address(accounts[this._index])
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});
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}
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sendUncheckedTransaction(transaction: TransactionRequest): Promise<string> {
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transaction = shallowCopy(transaction);
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let fromAddress = this.getAddress().then((address) => {
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if (address) { address = address.toLowerCase(); }
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return address;
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});
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// The JSON-RPC for eth_sendTransaction uses 90000 gas; if the user
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// wishes to use this, it is easy to specify explicitly, otherwise
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// we look it up for them.
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if (transaction.gasLimit == null) {
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let estimate = shallowCopy(transaction);
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estimate.from = fromAddress;
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transaction.gasLimit = this.provider.estimateGas(estimate);
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}
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return Promise.all([
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resolveProperties(transaction),
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fromAddress
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]).then((results) => {
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let tx = results[0];
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let hexTx = (<any>this.provider.constructor).hexlifyTransaction(tx);
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hexTx.from = results[1];
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return this.provider.send("eth_sendTransaction", [ hexTx ]).then((hash) => {
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return hash;
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}, (error) => {
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if (error.responseText) {
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// See: JsonRpcProvider.sendTransaction (@TODO: Expose a ._throwError??)
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if (error.responseText.indexOf("insufficient funds") >= 0) {
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logger.throwError("insufficient funds", Logger.errors.INSUFFICIENT_FUNDS, {
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transaction: tx
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});
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}
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if (error.responseText.indexOf("nonce too low") >= 0) {
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logger.throwError("nonce has already been used", Logger.errors.NONCE_EXPIRED, {
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transaction: tx
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});
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}
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if (error.responseText.indexOf("replacement transaction underpriced") >= 0) {
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logger.throwError("replacement fee too low", Logger.errors.REPLACEMENT_UNDERPRICED, {
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transaction: tx
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});
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}
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}
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throw error;
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});
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});
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}
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signTransaction(transaction: TransactionRequest): Promise<string> {
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return logger.throwError("signing transactions is unsupported", Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "signTransaction"
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});
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}
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sendTransaction(transaction: TransactionRequest): Promise<TransactionResponse> {
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return this.sendUncheckedTransaction(transaction).then((hash) => {
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return poll(() => {
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return this.provider.getTransaction(hash).then((tx: TransactionResponse) => {
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if (tx === null) { return undefined; }
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return this.provider._wrapTransaction(tx, hash);
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});
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}, { onceBlock: this.provider }).catch((error: Error) => {
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(<any>error).transactionHash = hash;
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throw error;
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});
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});
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}
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signMessage(message: Bytes | string): Promise<string> {
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let data = ((typeof(message) === "string") ? toUtf8Bytes(message): message);
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return this.getAddress().then((address) => {
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// https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign
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return this.provider.send("eth_sign", [ address.toLowerCase(), hexlify(data) ]);
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});
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}
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unlock(password: string): Promise<boolean> {
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let provider = this.provider;
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return this.getAddress().then(function(address) {
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return provider.send("personal_unlockAccount", [ address.toLowerCase(), password, null ]);
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});
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}
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}
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class UncheckedJsonRpcSigner extends JsonRpcSigner {
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sendTransaction(transaction: TransactionRequest): Promise<TransactionResponse> {
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return this.sendUncheckedTransaction(transaction).then((hash) => {
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return <TransactionResponse>{
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hash: hash,
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nonce: null,
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gasLimit: null,
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gasPrice: null,
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data: null,
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value: null,
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chainId: null,
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confirmations: 0,
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from: null,
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wait: (confirmations?: number) => { return this.provider.waitForTransaction(hash, confirmations); }
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};
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});
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}
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}
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const allowedTransactionKeys: { [ key: string ]: boolean } = {
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chainId: true, data: true, gasLimit: true, gasPrice:true, nonce: true, to: true, value: true
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}
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export class JsonRpcProvider extends BaseProvider {
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readonly connection: ConnectionInfo;
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_pendingFilter: Promise<number>;
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_nextId: number;
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constructor(url?: ConnectionInfo | string, network?: Networkish) {
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logger.checkNew(new.target, JsonRpcProvider);
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// One parameter, but it is a network name, so swap it with the URL
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if (typeof(url) === "string") {
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if (network === null && getNetwork(url)) {
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network = url;
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url = null;
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}
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}
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if (network) {
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// The network has been specified explicitly, we can use it
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super(network);
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} else {
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// The network is unknown, query the JSON-RPC for it
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let ready: Promise<Network> = new Promise((resolve, reject) => {
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setTimeout(() => {
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this.send("eth_chainId", [ ]).then((result) => {
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resolve(getNetwork(BigNumber.from(result).toNumber()));
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}).catch((error) => {
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this.send("net_version", [ ]).then((result) => {
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resolve(getNetwork(BigNumber.from(result).toNumber()));
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}).catch((error) => {
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reject(logger.makeError("could not detect network", Logger.errors.NETWORK_ERROR));
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});
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});
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});
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});
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super(ready);
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}
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// Default URL
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if (!url) { url = "http:/" + "/localhost:8545"; }
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if (typeof(url) === "string") {
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this.connection = {
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url: url
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};
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} else {
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this.connection = url;
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}
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this._nextId = 42;
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}
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getSigner(addressOrIndex?: string | number): JsonRpcSigner {
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return new JsonRpcSigner(_constructorGuard, this, addressOrIndex);
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}
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getUncheckedSigner(addressOrIndex?: string | number): UncheckedJsonRpcSigner {
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return this.getSigner(addressOrIndex).connectUnchecked();
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}
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listAccounts(): Promise<Array<string>> {
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return this.send("eth_accounts", []).then((accounts: Array<string>) => {
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return accounts.map((a) => this.formatter.address(a));
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});
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}
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send(method: string, params: any): Promise<any> {
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let request = {
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method: method,
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params: params,
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id: (this._nextId++),
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jsonrpc: "2.0"
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};
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this.emit("debug", {
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action: "request",
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request: deepCopy(request),
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provider: this
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});
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return fetchJson(this.connection, JSON.stringify(request), getResult).then((result) => {
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this.emit("debug", {
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action: "response",
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request: request,
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response: result,
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provider: this
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});
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return result;
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});
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}
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perform(method: string, params: any): Promise<any> {
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switch (method) {
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case "getBlockNumber":
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return this.send("eth_blockNumber", []);
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case "getGasPrice":
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return this.send("eth_gasPrice", []);
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case "getBalance":
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return this.send("eth_getBalance", [ getLowerCase(params.address), params.blockTag ]);
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case "getTransactionCount":
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return this.send("eth_getTransactionCount", [ getLowerCase(params.address), params.blockTag ]);
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case "getCode":
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return this.send("eth_getCode", [ getLowerCase(params.address), params.blockTag ]);
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case "getStorageAt":
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return this.send("eth_getStorageAt", [ getLowerCase(params.address), params.position, params.blockTag ]);
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case "sendTransaction":
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return this.send("eth_sendRawTransaction", [ params.signedTransaction ]).catch((error) => {
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if (error.responseText) {
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// "insufficient funds for gas * price + value"
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if (error.responseText.indexOf("insufficient funds") > 0) {
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logger.throwError("insufficient funds", Logger.errors.INSUFFICIENT_FUNDS, { });
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}
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// "nonce too low"
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if (error.responseText.indexOf("nonce too low") > 0) {
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logger.throwError("nonce has already been used", Logger.errors.NONCE_EXPIRED, { });
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}
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// "replacement transaction underpriced"
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if (error.responseText.indexOf("replacement transaction underpriced") > 0) {
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logger.throwError("replacement fee too low", Logger.errors.REPLACEMENT_UNDERPRICED, { });
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}
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}
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throw error;
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});
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case "getBlock":
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if (params.blockTag) {
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return this.send("eth_getBlockByNumber", [ params.blockTag, !!params.includeTransactions ]);
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} else if (params.blockHash) {
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return this.send("eth_getBlockByHash", [ params.blockHash, !!params.includeTransactions ]);
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}
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return Promise.reject(new Error("invalid block tag or block hash"));
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case "getTransaction":
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return this.send("eth_getTransactionByHash", [ params.transactionHash ]);
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case "getTransactionReceipt":
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return this.send("eth_getTransactionReceipt", [ params.transactionHash ]);
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case "call":
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return this.send("eth_call", [ (<any>this.constructor).hexlifyTransaction(params.transaction, { from: true }), params.blockTag ]);
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case "estimateGas":
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return this.send("eth_estimateGas", [ (<any>this.constructor).hexlifyTransaction(params.transaction, { from: true }) ]);
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case "getLogs":
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if (params.filter && params.filter.address != null) {
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params.filter.address = getLowerCase(params.filter.address);
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}
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return this.send("eth_getLogs", [ params.filter ]);
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default:
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break;
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}
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return logger.throwError(method + " not implemented", Logger.errors.NOT_IMPLEMENTED, { operation: method });
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}
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_startPending(): void {
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if (this._pendingFilter != null) { return; }
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let self = this;
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let pendingFilter: Promise<number> = this.send("eth_newPendingTransactionFilter", []);
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this._pendingFilter = pendingFilter;
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pendingFilter.then(function(filterId) {
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function poll() {
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self.send("eth_getFilterChanges", [ filterId ]).then(function(hashes: Array<string>) {
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if (self._pendingFilter != pendingFilter) { return null; }
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let seq = Promise.resolve();
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hashes.forEach(function(hash) {
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// @TODO: This should be garbage collected at some point... How? When?
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self._emitted["t:" + hash.toLowerCase()] = "pending";
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seq = seq.then(function() {
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return self.getTransaction(hash).then(function(tx) {
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self.emit("pending", tx);
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return null;
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});
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});
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});
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return seq.then(function() {
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return timer(1000);
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});
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}).then(function() {
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if (self._pendingFilter != pendingFilter) {
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self.send("eth_uninstallFilter", [ filterId ]);
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return;
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}
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setTimeout(function() { poll(); }, 0);
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return null;
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}).catch((error: Error) => { });
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}
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poll();
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return filterId;
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}).catch((error: Error) => { });
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}
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_stopPending(): void {
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this._pendingFilter = null;
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}
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// Convert an ethers.js transaction into a JSON-RPC transaction
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// - gasLimit => gas
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// - All values hexlified
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// - All numeric values zero-striped
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// NOTE: This allows a TransactionRequest, but all values should be resolved
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// before this is called
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static hexlifyTransaction(transaction: TransactionRequest, allowExtra?: { [key: string]: boolean }): { [key: string]: string } {
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// Check only allowed properties are given
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let allowed = shallowCopy(allowedTransactionKeys);
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if (allowExtra) {
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for (let key in allowExtra) {
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if (allowExtra[key]) { allowed[key] = true; }
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}
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}
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checkProperties(transaction, allowed);
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let result: { [key: string]: string } = {};
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// Some nodes (INFURA ropsten; INFURA mainnet is fine) do not like leading zeros.
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["gasLimit", "gasPrice", "nonce", "value"].forEach(function(key) {
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if ((<any>transaction)[key] == null) { return; }
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let value = hexValue((<any>transaction)[key]);
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if (key === "gasLimit") { key = "gas"; }
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result[key] = value;
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});
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["from", "to", "data"].forEach(function(key) {
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if ((<any>transaction)[key] == null) { return; }
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result[key] = hexlify((<any>transaction)[key]);
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});
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return result;
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}
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}
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