638 lines
23 KiB
TypeScript
638 lines
23 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, TypedDataDomain, TypedDataField, TypedDataSigner } from "@ethersproject/abstract-signer";
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import { BigNumber } from "@ethersproject/bignumber";
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import { Bytes, hexlify, hexValue, isHexString } from "@ethersproject/bytes";
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import { _TypedDataEncoder } from "@ethersproject/hash";
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import { Network, Networkish } from "@ethersproject/networks";
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import { checkProperties, deepCopy, Deferrable, defineReadOnly, getStatic, resolveProperties, shallowCopy } from "@ethersproject/properties";
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import { toUtf8Bytes } from "@ethersproject/strings";
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import { AccessList, accessListify } from "@ethersproject/transactions";
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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, Event } from "./base-provider";
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const errorGas = [ "call", "estimateGas" ];
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function checkError(method: string, error: any, params: any): any {
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// Undo the "convenience" some nodes are attempting to prevent backwards
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// incompatibility; maybe for v6 consider forwarding reverts as errors
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if (method === "call" && error.code === Logger.errors.SERVER_ERROR) {
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const e = error.error;
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if (e && e.message.match("reverted") && isHexString(e.data)) {
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return e.data;
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}
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logger.throwError("missing revert data in call exception", Logger.errors.CALL_EXCEPTION, {
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error, data: "0x"
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});
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}
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let message = error.message;
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if (error.code === Logger.errors.SERVER_ERROR && error.error && typeof(error.error.message) === "string") {
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message = error.error.message;
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} else if (typeof(error.body) === "string") {
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message = error.body;
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} else if (typeof(error.responseText) === "string") {
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message = error.responseText;
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}
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message = (message || "").toLowerCase();
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const transaction = params.transaction || params.signedTransaction;
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// "insufficient funds for gas * price + value + cost(data)"
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if (message.match(/insufficient funds/)) {
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logger.throwError("insufficient funds for intrinsic transaction cost", Logger.errors.INSUFFICIENT_FUNDS, {
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error, method, transaction
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});
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}
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// "nonce too low"
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if (message.match(/nonce too low/)) {
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logger.throwError("nonce has already been used", Logger.errors.NONCE_EXPIRED, {
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error, method, transaction
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});
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}
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// "replacement transaction underpriced"
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if (message.match(/replacement transaction underpriced/)) {
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logger.throwError("replacement fee too low", Logger.errors.REPLACEMENT_UNDERPRICED, {
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error, method, transaction
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});
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}
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// "replacement transaction underpriced"
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if (message.match(/only replay-protected/)) {
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logger.throwError("legacy pre-eip-155 transactions not supported", Logger.errors.UNSUPPORTED_OPERATION, {
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error, method, transaction
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});
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}
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if (errorGas.indexOf(method) >= 0 && message.match(/gas required exceeds allowance|always failing transaction|execution reverted/)) {
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logger.throwError("cannot estimate gas; transaction may fail or may require manual gas limit", Logger.errors.UNPREDICTABLE_GAS_LIMIT, {
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error, method, transaction
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});
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}
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throw error;
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}
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function timer(timeout: number): Promise<any> {
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return new Promise(function(resolve) {
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setTimeout(resolve, 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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const 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 implements TypedDataSigner {
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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: Deferrable<TransactionRequest>): Promise<string> {
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transaction = shallowCopy(transaction);
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const 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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const 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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if (transaction.to != null) {
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transaction.to = Promise.resolve(transaction.to).then(async (to) => {
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if (to == null) { return null; }
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const address = await this.provider.resolveName(to);
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if (address == null) {
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logger.throwArgumentError("provided ENS name resolves to null", "tx.to", to);
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}
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return address;
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});
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}
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return resolveProperties({
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tx: resolveProperties(transaction),
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sender: fromAddress
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}).then(({ tx, sender }) => {
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if (tx.from != null) {
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if (tx.from.toLowerCase() !== sender) {
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logger.throwArgumentError("from address mismatch", "transaction", transaction);
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}
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} else {
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tx.from = sender;
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}
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const hexTx = (<any>this.provider.constructor).hexlifyTransaction(tx, { from: true });
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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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return checkError("sendTransaction", error, hexTx);
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});
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});
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}
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signTransaction(transaction: Deferrable<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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async sendTransaction(transaction: Deferrable<TransactionRequest>): Promise<TransactionResponse> {
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// This cannot be mined any earlier than any recent block
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const blockNumber = await this.provider._getInternalBlockNumber(100 + 2 * this.provider.pollingInterval);
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// Send the transaction
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const hash = await this.sendUncheckedTransaction(transaction);
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try {
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// Unfortunately, JSON-RPC only provides and opaque transaction hash
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// for a response, and we need the actual transaction, so we poll
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// for it; it should show up very quickly
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return await poll(async () => {
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const tx = await this.provider.getTransaction(hash);
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if (tx === null) { return undefined; }
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return this.provider._wrapTransaction(tx, hash, blockNumber);
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}, { oncePoll: this.provider });
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} catch (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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async signMessage(message: Bytes | string): Promise<string> {
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const data = ((typeof(message) === "string") ? toUtf8Bytes(message): message);
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const address = await this.getAddress();
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// https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign
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return await this.provider.send("eth_sign", [ address.toLowerCase(), hexlify(data) ]);
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}
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async _signTypedData(domain: TypedDataDomain, types: Record<string, Array<TypedDataField>>, value: Record<string, any>): Promise<string> {
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// Populate any ENS names (in-place)
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const populated = await _TypedDataEncoder.resolveNames(domain, types, value, (name: string) => {
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return this.provider.resolveName(name);
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});
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const address = await this.getAddress();
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return await this.provider.send("eth_signTypedData_v4", [
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address.toLowerCase(),
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JSON.stringify(_TypedDataEncoder.getPayload(populated.domain, types, populated.value))
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]);
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}
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async unlock(password: string): Promise<boolean> {
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const provider = this.provider;
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const address = await this.getAddress();
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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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class UncheckedJsonRpcSigner extends JsonRpcSigner {
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sendTransaction(transaction: Deferrable<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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type: true, accessList: 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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// During any given event loop, the results for a given call will
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// all be the same, so we can dedup the calls to save requests and
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// bandwidth. @TODO: Try out generalizing this against send?
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_eventLoopCache: Record<string, Promise<any>>;
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get _cache(): Record<string, Promise<any>> {
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if (this._eventLoopCache == null) {
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this._eventLoopCache = { };
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}
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return this._eventLoopCache;
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}
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constructor(url?: ConnectionInfo | string, network?: Networkish) {
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logger.checkNew(new.target, JsonRpcProvider);
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let networkOrReady: Networkish | Promise<Network> = network;
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// The network is unknown, query the JSON-RPC for it
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if (networkOrReady == null) {
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networkOrReady = new Promise((resolve, reject) => {
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setTimeout(() => {
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this.detectNetwork().then((network) => {
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resolve(network);
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}, (error) => {
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reject(error);
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});
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}, 0);
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});
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}
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super(networkOrReady);
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// Default URL
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if (!url) { url = getStatic<() => string>(this.constructor, "defaultUrl")(); }
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if (typeof(url) === "string") {
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defineReadOnly(this, "connection",Object.freeze({
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url: url
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}));
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} else {
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defineReadOnly(this, "connection", Object.freeze(shallowCopy(url)));
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}
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this._nextId = 42;
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}
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static defaultUrl(): string {
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return "http:/\/localhost:8545";
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}
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detectNetwork(): Promise<Network> {
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if (!this._cache["detectNetwork"]) {
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this._cache["detectNetwork"] = this._uncachedDetectNetwork();
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// Clear this cache at the beginning of the next event loop
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setTimeout(() => {
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this._cache["detectNetwork"] = null;
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}, 0);
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}
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return this._cache["detectNetwork"];
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}
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async _uncachedDetectNetwork(): Promise<Network> {
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await timer(0);
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let chainId = null;
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try {
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chainId = await this.send("eth_chainId", [ ]);
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} catch (error) {
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try {
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chainId = await this.send("net_version", [ ]);
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} catch (error) { }
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}
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if (chainId != null) {
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const getNetwork = getStatic<(network: Networkish) => Network>(this.constructor, "getNetwork");
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try {
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return getNetwork(BigNumber.from(chainId).toNumber());
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} catch (error) {
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return logger.throwError("could not detect network", Logger.errors.NETWORK_ERROR, {
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chainId: chainId,
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event: "invalidNetwork",
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serverError: error
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});
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}
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}
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return logger.throwError("could not detect network", Logger.errors.NETWORK_ERROR, {
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event: "noNetwork"
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});
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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: Array<any>): Promise<any> {
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const 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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// We can expand this in the future to any call, but for now these
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// are the biggest wins and do not require any serializing parameters.
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const cache = ([ "eth_chainId", "eth_blockNumber" ].indexOf(method) >= 0);
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if (cache && this._cache[method]) {
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return this._cache[method];
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}
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const result = 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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}, (error) => {
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this.emit("debug", {
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action: "response",
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error: error,
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request: request,
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provider: this
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});
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throw error;
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});
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// Cache the fetch, but clear it on the next event loop
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if (cache) {
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this._cache[method] = result;
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setTimeout(() => {
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this._cache[method] = null;
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}, 0);
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}
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return result;
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}
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prepareRequest(method: string, params: any): [ string, Array<any> ] {
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switch (method) {
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case "getBlockNumber":
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return [ "eth_blockNumber", [] ];
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case "getGasPrice":
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return [ "eth_gasPrice", [] ];
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case "getBalance":
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return [ "eth_getBalance", [ getLowerCase(params.address), params.blockTag ] ];
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case "getTransactionCount":
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return [ "eth_getTransactionCount", [ getLowerCase(params.address), params.blockTag ] ];
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case "getCode":
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return [ "eth_getCode", [ getLowerCase(params.address), params.blockTag ] ];
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case "getStorageAt":
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return [ "eth_getStorageAt", [ getLowerCase(params.address), params.position, params.blockTag ] ];
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case "sendTransaction":
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return [ "eth_sendRawTransaction", [ params.signedTransaction ] ]
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case "getBlock":
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if (params.blockTag) {
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return [ "eth_getBlockByNumber", [ params.blockTag, !!params.includeTransactions ] ];
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} else if (params.blockHash) {
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return [ "eth_getBlockByHash", [ params.blockHash, !!params.includeTransactions ] ];
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}
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return null;
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case "getTransaction":
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return [ "eth_getTransactionByHash", [ params.transactionHash ] ];
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case "getTransactionReceipt":
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return [ "eth_getTransactionReceipt", [ params.transactionHash ] ];
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case "call": {
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const hexlifyTransaction = getStatic<(t: TransactionRequest, a?: { [key: string]: boolean }) => { [key: string]: string }>(this.constructor, "hexlifyTransaction");
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return [ "eth_call", [ hexlifyTransaction(params.transaction, { from: true }), params.blockTag ] ];
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}
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case "estimateGas": {
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const hexlifyTransaction = getStatic<(t: TransactionRequest, a?: { [key: string]: boolean }) => { [key: string]: string }>(this.constructor, "hexlifyTransaction");
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return [ "eth_estimateGas", [ hexlifyTransaction(params.transaction, { from: true }) ] ];
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}
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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 [ "eth_getLogs", [ params.filter ] ];
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default:
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break;
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}
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return null;
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}
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async perform(method: string, params: any): Promise<any> {
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const args = this.prepareRequest(method, params);
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|
if (args == null) {
|
|
logger.throwError(method + " not implemented", Logger.errors.NOT_IMPLEMENTED, { operation: method });
|
|
}
|
|
try {
|
|
return await this.send(args[0], args[1])
|
|
} catch (error) {
|
|
return checkError(method, error, params);
|
|
}
|
|
}
|
|
|
|
_startEvent(event: Event): void {
|
|
if (event.tag === "pending") { this._startPending(); }
|
|
super._startEvent(event);
|
|
}
|
|
|
|
_startPending(): void {
|
|
if (this._pendingFilter != null) { return; }
|
|
const self = this;
|
|
|
|
const pendingFilter: Promise<number> = this.send("eth_newPendingTransactionFilter", []);
|
|
this._pendingFilter = pendingFilter;
|
|
|
|
pendingFilter.then(function(filterId) {
|
|
function poll() {
|
|
self.send("eth_getFilterChanges", [ filterId ]).then(function(hashes: Array<string>) {
|
|
if (self._pendingFilter != pendingFilter) { return null; }
|
|
|
|
let seq = Promise.resolve();
|
|
hashes.forEach(function(hash) {
|
|
// @TODO: This should be garbage collected at some point... How? When?
|
|
self._emitted["t:" + hash.toLowerCase()] = "pending";
|
|
seq = seq.then(function() {
|
|
return self.getTransaction(hash).then(function(tx) {
|
|
self.emit("pending", tx);
|
|
return null;
|
|
});
|
|
});
|
|
});
|
|
|
|
return seq.then(function() {
|
|
return timer(1000);
|
|
});
|
|
}).then(function() {
|
|
if (self._pendingFilter != pendingFilter) {
|
|
self.send("eth_uninstallFilter", [ filterId ]);
|
|
return;
|
|
}
|
|
setTimeout(function() { poll(); }, 0);
|
|
|
|
return null;
|
|
}).catch((error: Error) => { });
|
|
}
|
|
poll();
|
|
|
|
return filterId;
|
|
}).catch((error: Error) => { });
|
|
}
|
|
|
|
_stopEvent(event: Event): void {
|
|
if (event.tag === "pending" && this.listenerCount("pending") === 0) {
|
|
this._pendingFilter = null;
|
|
}
|
|
super._stopEvent(event);
|
|
}
|
|
|
|
|
|
// Convert an ethers.js transaction into a JSON-RPC transaction
|
|
// - gasLimit => gas
|
|
// - All values hexlified
|
|
// - All numeric values zero-striped
|
|
// - All addresses are lowercased
|
|
// NOTE: This allows a TransactionRequest, but all values should be resolved
|
|
// before this is called
|
|
// @TODO: This will likely be removed in future versions and prepareRequest
|
|
// will be the preferred method for this.
|
|
static hexlifyTransaction(transaction: TransactionRequest, allowExtra?: { [key: string]: boolean }): { [key: string]: string | AccessList } {
|
|
// Check only allowed properties are given
|
|
const allowed = shallowCopy(allowedTransactionKeys);
|
|
if (allowExtra) {
|
|
for (const key in allowExtra) {
|
|
if (allowExtra[key]) { allowed[key] = true; }
|
|
}
|
|
}
|
|
|
|
checkProperties(transaction, allowed);
|
|
|
|
const result: { [key: string]: string | AccessList } = {};
|
|
|
|
// Some nodes (INFURA ropsten; INFURA mainnet is fine) do not like leading zeros.
|
|
["gasLimit", "gasPrice", "type", "maxFeePerGas", "maxPriorityFeePerGas", "nonce", "value"].forEach(function(key) {
|
|
if ((<any>transaction)[key] == null) { return; }
|
|
const value = hexValue((<any>transaction)[key]);
|
|
if (key === "gasLimit") { key = "gas"; }
|
|
result[key] = value;
|
|
});
|
|
|
|
["from", "to", "data"].forEach(function(key) {
|
|
if ((<any>transaction)[key] == null) { return; }
|
|
result[key] = hexlify((<any>transaction)[key]);
|
|
});
|
|
|
|
if ((<any>transaction).accessList) {
|
|
result["accessList"] = accessListify((<any>transaction).accessList);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
}
|