contract.js

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