770 lines
28 KiB
JavaScript
770 lines
28 KiB
JavaScript
import { Interface, Typed } from "../abi/index.js";
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import { resolveAddress } from "../address/index.js";
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// import from provider.ts instead of index.ts to prevent circular dep
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// from EtherscanProvider
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import { copyRequest, Log } from "../providers/provider.js";
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import { defineProperties, isCallException, isHexString, resolveProperties, makeError, assert, assertArgument } from "../utils/index.js";
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import { ContractEventPayload, ContractUnknownEventPayload, ContractTransactionResponse, EventLog } from "./wrappers.js";
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const BN_0 = BigInt(0);
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function canCall(value) {
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return (value && typeof (value.call) === "function");
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}
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function canEstimate(value) {
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return (value && typeof (value.estimateGas) === "function");
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}
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function canResolve(value) {
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return (value && typeof (value.resolveName) === "function");
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}
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function canSend(value) {
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return (value && typeof (value.sendTransaction) === "function");
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}
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class PreparedTopicFilter {
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#filter;
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fragment;
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constructor(contract, fragment, args) {
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defineProperties(this, { fragment });
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if (fragment.inputs.length < args.length) {
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throw new Error("too many arguments");
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}
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// Recursively descend into args and resolve any addresses
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const runner = getRunner(contract.runner, "resolveName");
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const resolver = canResolve(runner) ? runner : null;
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this.#filter = (async function () {
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const resolvedArgs = await Promise.all(fragment.inputs.map((param, index) => {
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const arg = args[index];
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if (arg == null) {
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return null;
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}
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return param.walkAsync(args[index], (type, value) => {
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if (type === "address") {
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return resolveAddress(value, resolver);
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}
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return value;
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});
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}));
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return contract.interface.encodeFilterTopics(fragment, resolvedArgs);
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})();
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}
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getTopicFilter() {
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return this.#filter;
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}
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}
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// A = Arguments passed in as a tuple
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// R = The result type of the call (i.e. if only one return type,
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// the qualified type, otherwise Result)
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// D = The type the default call will return (i.e. R for view/pure,
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// TransactionResponse otherwise)
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//export interface ContractMethod<A extends Array<any> = Array<any>, R = any, D extends R | ContractTransactionResponse = ContractTransactionResponse> {
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function _WrappedMethodBase() {
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return Function;
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}
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function getRunner(value, feature) {
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if (value == null) {
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return null;
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}
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if (typeof (value[feature]) === "function") {
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return value;
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}
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if (value.provider && typeof (value.provider[feature]) === "function") {
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return value.provider;
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}
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return null;
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}
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function getProvider(value) {
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if (value == null) {
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return null;
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}
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return value.provider || null;
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}
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/**
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* @_ignore:
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*/
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export async function copyOverrides(arg, allowed) {
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// Create a shallow copy (we'll deep-ify anything needed during normalizing)
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const overrides = copyRequest(Typed.dereference(arg, "overrides"));
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assertArgument(overrides.to == null || (allowed || []).indexOf("to") >= 0, "cannot override to", "overrides.to", overrides.to);
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assertArgument(overrides.data == null || (allowed || []).indexOf("data") >= 0, "cannot override data", "overrides.data", overrides.data);
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// Resolve any from
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if (overrides.from) {
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overrides.from = await resolveAddress(overrides.from);
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}
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return overrides;
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}
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/**
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* @_ignore:
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*/
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export async function resolveArgs(_runner, inputs, args) {
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// Recursively descend into args and resolve any addresses
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const runner = getRunner(_runner, "resolveName");
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const resolver = canResolve(runner) ? runner : null;
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return await Promise.all(inputs.map((param, index) => {
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return param.walkAsync(args[index], (type, value) => {
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value = Typed.dereference(value, type);
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if (type === "address") {
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return resolveAddress(value, resolver);
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}
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return value;
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});
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}));
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}
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class WrappedFallback {
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_contract;
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constructor(contract) {
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defineProperties(this, { _contract: contract });
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const proxy = new Proxy(this, {
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// Perform send when called
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apply: async (target, thisArg, args) => {
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return await target.send(...args);
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},
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});
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return proxy;
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}
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async populateTransaction(overrides) {
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// If an overrides was passed in, copy it and normalize the values
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const tx = (await copyOverrides(overrides, ["data"]));
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tx.to = await this._contract.getAddress();
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const iface = this._contract.interface;
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// Only allow payable contracts to set non-zero value
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const payable = iface.receive || (iface.fallback && iface.fallback.payable);
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assertArgument(payable || (tx.value || BN_0) === BN_0, "cannot send value to non-payable contract", "overrides.value", tx.value);
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// Only allow fallback contracts to set non-empty data
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assertArgument(iface.fallback || (tx.data || "0x") === "0x", "cannot send data to receive-only contract", "overrides.data", tx.data);
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return tx;
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}
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async staticCall(overrides) {
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const runner = getRunner(this._contract.runner, "call");
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assert(canCall(runner), "contract runner does not support calling", "UNSUPPORTED_OPERATION", { operation: "call" });
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const tx = await this.populateTransaction(overrides);
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try {
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return await runner.call(tx);
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}
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catch (error) {
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if (isCallException(error) && error.data) {
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throw this._contract.interface.makeError(error.data, tx);
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}
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throw error;
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}
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}
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async send(overrides) {
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const runner = this._contract.runner;
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assert(canSend(runner), "contract runner does not support sending transactions", "UNSUPPORTED_OPERATION", { operation: "sendTransaction" });
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const tx = await runner.sendTransaction(await this.populateTransaction(overrides));
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const provider = getProvider(this._contract.runner);
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// @TODO: the provider can be null; make a custom dummy provider that will throw a
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// meaningful error
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return new ContractTransactionResponse(this._contract.interface, provider, tx);
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}
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async estimateGas(overrides) {
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const runner = getRunner(this._contract.runner, "estimateGas");
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assert(canEstimate(runner), "contract runner does not support gas estimation", "UNSUPPORTED_OPERATION", { operation: "estimateGas" });
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return await runner.estimateGas(await this.populateTransaction(overrides));
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}
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}
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class WrappedMethod extends _WrappedMethodBase() {
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name = ""; // Investigate!
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_contract;
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_key;
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constructor(contract, key) {
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super();
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defineProperties(this, {
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name: contract.interface.getFunctionName(key),
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_contract: contract, _key: key
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});
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const proxy = new Proxy(this, {
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// Perform the default operation for this fragment type
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apply: async (target, thisArg, args) => {
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const fragment = target.getFragment(...args);
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if (fragment.constant) {
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return await target.staticCall(...args);
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}
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return await target.send(...args);
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},
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});
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return proxy;
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}
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// Only works on non-ambiguous keys (refined fragment is always non-ambiguous)
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get fragment() {
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const fragment = this._contract.interface.getFunction(this._key);
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assert(fragment, "no matching fragment", "UNSUPPORTED_OPERATION", {
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operation: "fragment"
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});
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return fragment;
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}
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getFragment(...args) {
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const fragment = this._contract.interface.getFunction(this._key, args);
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assert(fragment, "no matching fragment", "UNSUPPORTED_OPERATION", {
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operation: "fragment"
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});
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return fragment;
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}
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async populateTransaction(...args) {
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const fragment = this.getFragment(...args);
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// If an overrides was passed in, copy it and normalize the values
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let overrides = {};
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if (fragment.inputs.length + 1 === args.length) {
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overrides = await copyOverrides(args.pop());
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}
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if (fragment.inputs.length !== args.length) {
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throw new Error("internal error: fragment inputs doesn't match arguments; should not happen");
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}
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const resolvedArgs = await resolveArgs(this._contract.runner, fragment.inputs, args);
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return Object.assign({}, overrides, await resolveProperties({
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to: this._contract.getAddress(),
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data: this._contract.interface.encodeFunctionData(fragment, resolvedArgs)
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}));
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}
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async staticCall(...args) {
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const result = await this.staticCallResult(...args);
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if (result.length === 1) {
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return result[0];
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}
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return result;
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}
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async send(...args) {
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const runner = this._contract.runner;
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assert(canSend(runner), "contract runner does not support sending transactions", "UNSUPPORTED_OPERATION", { operation: "sendTransaction" });
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const tx = await runner.sendTransaction(await this.populateTransaction(...args));
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const provider = getProvider(this._contract.runner);
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// @TODO: the provider can be null; make a custom dummy provider that will throw a
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// meaningful error
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return new ContractTransactionResponse(this._contract.interface, provider, tx);
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}
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async estimateGas(...args) {
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const runner = getRunner(this._contract.runner, "estimateGas");
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assert(canEstimate(runner), "contract runner does not support gas estimation", "UNSUPPORTED_OPERATION", { operation: "estimateGas" });
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return await runner.estimateGas(await this.populateTransaction(...args));
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}
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async staticCallResult(...args) {
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const runner = getRunner(this._contract.runner, "call");
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assert(canCall(runner), "contract runner does not support calling", "UNSUPPORTED_OPERATION", { operation: "call" });
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const tx = await this.populateTransaction(...args);
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let result = "0x";
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try {
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result = await runner.call(tx);
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}
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catch (error) {
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if (isCallException(error) && error.data) {
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throw this._contract.interface.makeError(error.data, tx);
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}
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throw error;
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}
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const fragment = this.getFragment(...args);
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return this._contract.interface.decodeFunctionResult(fragment, result);
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}
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}
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function _WrappedEventBase() {
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return Function;
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}
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class WrappedEvent extends _WrappedEventBase() {
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name = ""; // @TODO: investigate
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_contract;
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_key;
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constructor(contract, key) {
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super();
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defineProperties(this, {
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name: contract.interface.getEventName(key),
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_contract: contract, _key: key
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});
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return new Proxy(this, {
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// Perform the default operation for this fragment type
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apply: (target, thisArg, args) => {
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return new PreparedTopicFilter(contract, target.getFragment(...args), args);
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},
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});
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}
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// Only works on non-ambiguous keys
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get fragment() {
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const fragment = this._contract.interface.getEvent(this._key);
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assert(fragment, "no matching fragment", "UNSUPPORTED_OPERATION", {
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operation: "fragment"
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});
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return fragment;
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}
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getFragment(...args) {
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const fragment = this._contract.interface.getEvent(this._key, args);
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assert(fragment, "no matching fragment", "UNSUPPORTED_OPERATION", {
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operation: "fragment"
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});
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return fragment;
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}
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}
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;
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// The combination of TypeScrype, Private Fields and Proxies makes
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// the world go boom; so we hide variables with some trickery keeping
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// a symbol attached to each BaseContract which its sub-class (even
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// via a Proxy) can reach and use to look up its internal values.
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const internal = Symbol.for("_ethersInternal_contract");
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const internalValues = new WeakMap();
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function setInternal(contract, values) {
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internalValues.set(contract[internal], values);
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}
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function getInternal(contract) {
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return internalValues.get(contract[internal]);
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}
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function isDeferred(value) {
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return (value && typeof (value) === "object" && ("getTopicFilter" in value) &&
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(typeof (value.getTopicFilter) === "function") && value.fragment);
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}
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async function getSubInfo(contract, event) {
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let topics;
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let fragment = null;
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// Convert named events to topicHash and get the fragment for
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// events which need deconstructing.
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if (Array.isArray(event)) {
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const topicHashify = function (name) {
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if (isHexString(name, 32)) {
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return name;
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}
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const fragment = contract.interface.getEvent(name);
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assertArgument(fragment, "unknown fragment", "name", name);
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return fragment.topicHash;
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};
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// Array of Topics and Names; e.g. `[ "0x1234...89ab", "Transfer(address)" ]`
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topics = event.map((e) => {
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if (e == null) {
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return null;
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}
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if (Array.isArray(e)) {
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return e.map(topicHashify);
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}
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return topicHashify(e);
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});
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}
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else if (event === "*") {
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topics = [null];
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}
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else if (typeof (event) === "string") {
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if (isHexString(event, 32)) {
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// Topic Hash
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topics = [event];
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}
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else {
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// Name or Signature; e.g. `"Transfer", `"Transfer(address)"`
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fragment = contract.interface.getEvent(event);
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assertArgument(fragment, "unknown fragment", "event", event);
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topics = [fragment.topicHash];
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}
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}
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else if (isDeferred(event)) {
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// Deferred Topic Filter; e.g. `contract.filter.Transfer(from)`
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topics = await event.getTopicFilter();
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}
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else if ("fragment" in event) {
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// ContractEvent; e.g. `contract.filter.Transfer`
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fragment = event.fragment;
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topics = [fragment.topicHash];
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}
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else {
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assertArgument(false, "unknown event name", "event", event);
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}
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// Normalize topics and sort TopicSets
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topics = topics.map((t) => {
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if (t == null) {
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return null;
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}
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if (Array.isArray(t)) {
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const items = Array.from(new Set(t.map((t) => t.toLowerCase())).values());
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if (items.length === 1) {
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return items[0];
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}
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items.sort();
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return items;
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}
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return t.toLowerCase();
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});
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const tag = topics.map((t) => {
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if (t == null) {
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return "null";
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}
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if (Array.isArray(t)) {
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return t.join("|");
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}
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return t;
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}).join("&");
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return { fragment, tag, topics };
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}
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async function hasSub(contract, event) {
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const { subs } = getInternal(contract);
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return subs.get((await getSubInfo(contract, event)).tag) || null;
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}
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async function getSub(contract, operation, event) {
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// Make sure our runner can actually subscribe to events
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const provider = getProvider(contract.runner);
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assert(provider, "contract runner does not support subscribing", "UNSUPPORTED_OPERATION", { operation });
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const { fragment, tag, topics } = await getSubInfo(contract, event);
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const { addr, subs } = getInternal(contract);
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let sub = subs.get(tag);
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if (!sub) {
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const address = (addr ? addr : contract);
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const filter = { address, topics };
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const listener = (log) => {
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let foundFragment = fragment;
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if (foundFragment == null) {
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try {
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foundFragment = contract.interface.getEvent(log.topics[0]);
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}
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catch (error) { }
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}
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// If fragment is null, we do not deconstruct the args to emit
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if (foundFragment) {
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const _foundFragment = foundFragment;
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const args = fragment ? contract.interface.decodeEventLog(fragment, log.data, log.topics) : [];
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emit(contract, event, args, (listener) => {
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return new ContractEventPayload(contract, listener, event, _foundFragment, log);
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});
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}
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else {
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emit(contract, event, [], (listener) => {
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return new ContractUnknownEventPayload(contract, listener, event, log);
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});
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}
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};
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let starting = [];
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const start = () => {
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if (starting.length) {
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return;
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}
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starting.push(provider.on(filter, listener));
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};
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const stop = async () => {
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if (starting.length == 0) {
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return;
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}
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let started = starting;
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starting = [];
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await Promise.all(started);
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provider.off(filter, listener);
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};
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sub = { tag, listeners: [], start, stop };
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subs.set(tag, sub);
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}
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return sub;
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}
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// We use this to ensure one emit resolves before firing the next to
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// ensure correct ordering (note this cannot throw and just adds the
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// notice to the event queu using setTimeout).
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let lastEmit = Promise.resolve();
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async function _emit(contract, event, args, payloadFunc) {
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await lastEmit;
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const sub = await hasSub(contract, event);
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if (!sub) {
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return false;
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}
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const count = sub.listeners.length;
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sub.listeners = sub.listeners.filter(({ listener, once }) => {
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const passArgs = args.slice();
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if (payloadFunc) {
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passArgs.push(payloadFunc(once ? null : listener));
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}
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try {
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listener.call(contract, ...passArgs);
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}
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catch (error) { }
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return !once;
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});
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return (count > 0);
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}
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async function emit(contract, event, args, payloadFunc) {
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try {
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await lastEmit;
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}
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catch (error) { }
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const resultPromise = _emit(contract, event, args, payloadFunc);
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lastEmit = resultPromise;
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return await resultPromise;
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}
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const passProperties = ["then"];
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export class BaseContract {
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target;
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interface;
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runner;
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filters;
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[internal];
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fallback;
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constructor(target, abi, runner, _deployTx) {
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if (runner == null) {
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runner = null;
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}
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const iface = Interface.from(abi);
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defineProperties(this, { target, runner, interface: iface });
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Object.defineProperty(this, internal, { value: {} });
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let addrPromise;
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let addr = null;
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let deployTx = null;
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if (_deployTx) {
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const provider = getProvider(runner);
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// @TODO: the provider can be null; make a custom dummy provider that will throw a
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// meaningful error
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deployTx = new ContractTransactionResponse(this.interface, provider, _deployTx);
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}
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let subs = new Map();
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// Resolve the target as the address
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|
if (typeof (target) === "string") {
|
|
if (isHexString(target)) {
|
|
addr = target;
|
|
addrPromise = Promise.resolve(target);
|
|
}
|
|
else {
|
|
const resolver = getRunner(runner, "resolveName");
|
|
if (!canResolve(resolver)) {
|
|
throw makeError("contract runner does not support name resolution", "UNSUPPORTED_OPERATION", {
|
|
operation: "resolveName"
|
|
});
|
|
}
|
|
addrPromise = resolver.resolveName(target).then((addr) => {
|
|
if (addr == null) {
|
|
throw new Error("TODO");
|
|
}
|
|
getInternal(this).addr = addr;
|
|
return addr;
|
|
});
|
|
}
|
|
}
|
|
else {
|
|
addrPromise = target.getAddress().then((addr) => {
|
|
if (addr == null) {
|
|
throw new Error("TODO");
|
|
}
|
|
getInternal(this).addr = addr;
|
|
return addr;
|
|
});
|
|
}
|
|
// Set our private values
|
|
setInternal(this, { addrPromise, addr, deployTx, subs });
|
|
// Add the event filters
|
|
const filters = new Proxy({}, {
|
|
get: (target, _prop, receiver) => {
|
|
// Pass important checks (like `then` for Promise) through
|
|
if (passProperties.indexOf(_prop) >= 0) {
|
|
return Reflect.get(target, _prop, receiver);
|
|
}
|
|
const prop = String(_prop);
|
|
const result = this.getEvent(prop);
|
|
if (result) {
|
|
return result;
|
|
}
|
|
throw new Error(`unknown contract event: ${prop}`);
|
|
}
|
|
});
|
|
defineProperties(this, { filters });
|
|
defineProperties(this, {
|
|
fallback: ((iface.receive || iface.fallback) ? (new WrappedFallback(this)) : null)
|
|
});
|
|
// Return a Proxy that will respond to functions
|
|
return new Proxy(this, {
|
|
get: (target, _prop, receiver) => {
|
|
if (_prop in target || passProperties.indexOf(_prop) >= 0) {
|
|
return Reflect.get(target, _prop, receiver);
|
|
}
|
|
const prop = String(_prop);
|
|
const result = target.getFunction(prop);
|
|
if (result) {
|
|
return result;
|
|
}
|
|
throw new Error(`unknown contract method: ${prop}`);
|
|
}
|
|
});
|
|
}
|
|
connect(runner) {
|
|
return new BaseContract(this.target, this.interface, runner);
|
|
}
|
|
async getAddress() { return await getInternal(this).addrPromise; }
|
|
async getDeployedCode() {
|
|
const provider = getProvider(this.runner);
|
|
assert(provider, "runner does not support .provider", "UNSUPPORTED_OPERATION", { operation: "getDeployedCode" });
|
|
const code = await provider.getCode(await this.getAddress());
|
|
if (code === "0x") {
|
|
return null;
|
|
}
|
|
return code;
|
|
}
|
|
async waitForDeployment() {
|
|
// We have the deployement transaction; just use that (throws if deployement fails)
|
|
const deployTx = this.deploymentTransaction();
|
|
if (deployTx) {
|
|
await deployTx.wait();
|
|
return this;
|
|
}
|
|
// Check for code
|
|
const code = await this.getDeployedCode();
|
|
if (code != null) {
|
|
return this;
|
|
}
|
|
// Make sure we can subscribe to a provider event
|
|
const provider = getProvider(this.runner);
|
|
assert(provider != null, "contract runner does not support .provider", "UNSUPPORTED_OPERATION", { operation: "waitForDeployment" });
|
|
return new Promise((resolve, reject) => {
|
|
const checkCode = async () => {
|
|
try {
|
|
const code = await this.getDeployedCode();
|
|
if (code != null) {
|
|
return resolve(this);
|
|
}
|
|
provider.once("block", checkCode);
|
|
}
|
|
catch (error) {
|
|
reject(error);
|
|
}
|
|
};
|
|
checkCode();
|
|
});
|
|
}
|
|
deploymentTransaction() {
|
|
return getInternal(this).deployTx;
|
|
}
|
|
getFunction(key) {
|
|
if (typeof (key) !== "string") {
|
|
key = key.format();
|
|
}
|
|
return (new WrappedMethod(this, key));
|
|
}
|
|
getEvent(key) {
|
|
if (typeof (key) !== "string") {
|
|
key = key.format();
|
|
}
|
|
return (new WrappedEvent(this, key));
|
|
}
|
|
async queryTransaction(hash) {
|
|
// Is this useful?
|
|
throw new Error("@TODO");
|
|
}
|
|
async queryFilter(event, fromBlock, toBlock) {
|
|
if (fromBlock == null) {
|
|
fromBlock = 0;
|
|
}
|
|
if (toBlock == null) {
|
|
toBlock = "latest";
|
|
}
|
|
const { addr, addrPromise } = getInternal(this);
|
|
const address = (addr ? addr : (await addrPromise));
|
|
const { fragment, topics } = await getSubInfo(this, event);
|
|
const filter = { address, topics, fromBlock, toBlock };
|
|
const provider = getProvider(this.runner);
|
|
assert(provider, "contract runner does not have a provider", "UNSUPPORTED_OPERATION", { operation: "queryFilter" });
|
|
return (await provider.getLogs(filter)).map((log) => {
|
|
let foundFragment = fragment;
|
|
if (foundFragment == null) {
|
|
try {
|
|
foundFragment = this.interface.getEvent(log.topics[0]);
|
|
}
|
|
catch (error) { }
|
|
}
|
|
if (foundFragment) {
|
|
return new EventLog(log, this.interface, foundFragment);
|
|
}
|
|
else {
|
|
return new Log(log, provider);
|
|
}
|
|
});
|
|
}
|
|
async on(event, listener) {
|
|
const sub = await getSub(this, "on", event);
|
|
sub.listeners.push({ listener, once: false });
|
|
sub.start();
|
|
return this;
|
|
}
|
|
async once(event, listener) {
|
|
const sub = await getSub(this, "once", event);
|
|
sub.listeners.push({ listener, once: true });
|
|
sub.start();
|
|
return this;
|
|
}
|
|
async emit(event, ...args) {
|
|
return await emit(this, event, args, null);
|
|
}
|
|
async listenerCount(event) {
|
|
if (event) {
|
|
const sub = await hasSub(this, event);
|
|
if (!sub) {
|
|
return 0;
|
|
}
|
|
return sub.listeners.length;
|
|
}
|
|
const { subs } = getInternal(this);
|
|
let total = 0;
|
|
for (const { listeners } of subs.values()) {
|
|
total += listeners.length;
|
|
}
|
|
return total;
|
|
}
|
|
async listeners(event) {
|
|
if (event) {
|
|
const sub = await hasSub(this, event);
|
|
if (!sub) {
|
|
return [];
|
|
}
|
|
return sub.listeners.map(({ listener }) => listener);
|
|
}
|
|
const { subs } = getInternal(this);
|
|
let result = [];
|
|
for (const { listeners } of subs.values()) {
|
|
result = result.concat(listeners.map(({ listener }) => listener));
|
|
}
|
|
return result;
|
|
}
|
|
async off(event, listener) {
|
|
const sub = await hasSub(this, event);
|
|
if (!sub) {
|
|
return this;
|
|
}
|
|
if (listener) {
|
|
const index = sub.listeners.map(({ listener }) => listener).indexOf(listener);
|
|
if (index >= 0) {
|
|
sub.listeners.splice(index, 1);
|
|
}
|
|
}
|
|
if (listener == null || sub.listeners.length === 0) {
|
|
sub.stop();
|
|
getInternal(this).subs.delete(sub.tag);
|
|
}
|
|
return this;
|
|
}
|
|
async removeAllListeners(event) {
|
|
if (event) {
|
|
const sub = await hasSub(this, event);
|
|
if (!sub) {
|
|
return this;
|
|
}
|
|
sub.stop();
|
|
getInternal(this).subs.delete(sub.tag);
|
|
}
|
|
else {
|
|
const { subs } = getInternal(this);
|
|
for (const { tag, stop } of subs.values()) {
|
|
stop();
|
|
subs.delete(tag);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
// Alias for "on"
|
|
async addListener(event, listener) {
|
|
return await this.on(event, listener);
|
|
}
|
|
// Alias for "off"
|
|
async removeListener(event, listener) {
|
|
return await this.off(event, listener);
|
|
}
|
|
static buildClass(abi) {
|
|
class CustomContract extends BaseContract {
|
|
constructor(address, runner = null) {
|
|
super(address, abi, runner);
|
|
}
|
|
}
|
|
return CustomContract;
|
|
}
|
|
;
|
|
static from(target, abi, runner) {
|
|
if (runner == null) {
|
|
runner = null;
|
|
}
|
|
const contract = new this(target, abi, runner);
|
|
return contract;
|
|
}
|
|
}
|
|
function _ContractBase() {
|
|
return BaseContract;
|
|
}
|
|
export class Contract extends _ContractBase() {
|
|
}
|
|
//# sourceMappingURL=contract.js.map
|