ethers.js/packages/abstract-signer/lib/index.js

"use strict";
var __extends = (this && this.__extends) || (function () {
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    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
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};
Object.defineProperty(exports, "__esModule", { value: true });
var properties_1 = require("@ethersproject/properties");
var logger_1 = require("@ethersproject/logger");
var _version_1 = require("./_version");
var logger = new logger_1.Logger(_version_1.version);
var allowedTransactionKeys = [
    "chainId", "data", "from", "gasLimit", "gasPrice", "nonce", "to", "value"
];
// Sub-Class Notes:
//  - A Signer MUST always make sure, that if present, the "from" field
//    matches the Signer, before sending or signing a transaction
//  - A Signer SHOULD always wrap private information (such as a private
//    key or mnemonic) in a function, so that console.log does not leak
//    the data
var Signer = /** @class */ (function () {
    ///////////////////
    // Sub-classes MUST call super
    function Signer() {
        var _newTarget = this.constructor;
        logger.checkAbstract(_newTarget, Signer);
        properties_1.defineReadOnly(this, "_isSigner", true);
    }
    ///////////////////
    // Sub-classes MAY override these
    Signer.prototype.getBalance = function (blockTag) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("getBalance");
                        return [4 /*yield*/, this.provider.getBalance(this.getAddress(), blockTag)];
                    case 1: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    Signer.prototype.getTransactionCount = function (blockTag) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("getTransactionCount");
                        return [4 /*yield*/, this.provider.getTransactionCount(this.getAddress(), blockTag)];
                    case 1: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    // Populates "from" if unspecified, and estimates the gas for the transation
    Signer.prototype.estimateGas = function (transaction) {
        return __awaiter(this, void 0, void 0, function () {
            var tx;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("estimateGas");
                        return [4 /*yield*/, properties_1.resolveProperties(this.checkTransaction(transaction))];
                    case 1:
                        tx = _a.sent();
                        return [4 /*yield*/, this.provider.estimateGas(tx)];
                    case 2: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    // Populates "from" if unspecified, and calls with the transation
    Signer.prototype.call = function (transaction, blockTag) {
        return __awaiter(this, void 0, void 0, function () {
            var tx;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("call");
                        return [4 /*yield*/, properties_1.resolveProperties(this.checkTransaction(transaction))];
                    case 1:
                        tx = _a.sent();
                        return [4 /*yield*/, this.provider.call(tx, blockTag)];
                    case 2: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    // Populates all fields in a transaction, signs it and sends it to the network
    Signer.prototype.sendTransaction = function (transaction) {
        var _this = this;
        this._checkProvider("sendTransaction");
        return this.populateTransaction(transaction).then(function (tx) {
            return _this.signTransaction(tx).then(function (signedTx) {
                return _this.provider.sendTransaction(signedTx);
            });
        });
    };
    Signer.prototype.getChainId = function () {
        return __awaiter(this, void 0, void 0, function () {
            var network;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("getChainId");
                        return [4 /*yield*/, this.provider.getNetwork()];
                    case 1:
                        network = _a.sent();
                        return [2 /*return*/, network.chainId];
                }
            });
        });
    };
    Signer.prototype.getGasPrice = function () {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("getGasPrice");
                        return [4 /*yield*/, this.provider.getGasPrice()];
                    case 1: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    Signer.prototype.resolveName = function (name) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this._checkProvider("resolveName");
                        return [4 /*yield*/, this.provider.resolveName(name)];
                    case 1: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    // Checks a transaction does not contain invalid keys and if
    // no "from" is provided, populates it.
    // - does NOT require a provider
    // - adds "from" is not present
    // - returns a COPY (safe to mutate the result)
    // By default called from: (overriding these prevents it)
    //   - call
    //   - estimateGas
    //   - populateTransaction (and therefor sendTransaction)
    Signer.prototype.checkTransaction = function (transaction) {
        for (var key in transaction) {
            if (allowedTransactionKeys.indexOf(key) === -1) {
                logger.throwArgumentError("invalid transaction key: " + key, "transaction", transaction);
            }
        }
        var tx = properties_1.shallowCopy(transaction);
        if (tx.from == null) {
            tx.from = this.getAddress();
        }
        else {
            // Make sure any provided address matches this signer
            tx.from = Promise.all([
                Promise.resolve(tx.from),
                this.getAddress()
            ]).then(function (result) {
                if (result[0] !== result[1]) {
                    logger.throwArgumentError("from address mismatch", "transaction", transaction);
                }
                return result[0];
            });
        }
        return tx;
    };
    // Populates ALL keys for a transaction and checks that "from" matches
    // this Signer. Should be used by sendTransaction but NOT by signTransaction.
    // By default called from: (overriding these prevents it)
    //   - sendTransaction
    Signer.prototype.populateTransaction = function (transaction) {
        return __awaiter(this, void 0, void 0, function () {
            var tx;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, properties_1.resolveProperties(this.checkTransaction(transaction))];
                    case 1:
                        tx = _a.sent();
                        if (tx.to != null) {
                            tx.to = Promise.resolve(tx.to).then(function (to) { return _this.resolveName(to); });
                        }
                        if (tx.gasPrice == null) {
                            tx.gasPrice = this.getGasPrice();
                        }
                        if (tx.nonce == null) {
                            tx.nonce = this.getTransactionCount("pending");
                        }
                        if (tx.gasLimit == null) {
                            tx.gasLimit = this.estimateGas(tx).catch(function (error) {
                                return logger.throwError("cannot estimate gas; transaction may fail or may require manual gas limit", logger_1.Logger.errors.UNPREDICTABLE_GAS_LIMIT, {
                                    error: error,
                                    tx: tx
                                });
                            });
                        }
                        if (tx.chainId == null) {
                            tx.chainId = this.getChainId();
                        }
                        else {
                            tx.chainId = Promise.all([
                                Promise.resolve(tx.chainId),
                                this.getChainId()
                            ]).then(function (results) {
                                if (results[1] !== 0 && results[0] !== results[1]) {
                                    logger.throwArgumentError("chainId address mismatch", "transaction", transaction);
                                }
                                return results[0];
                            });
                        }
                        return [4 /*yield*/, properties_1.resolveProperties(tx)];
                    case 2: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    ///////////////////
    // Sub-classes SHOULD leave these alone
    Signer.prototype._checkProvider = function (operation) {
        if (!this.provider) {
            logger.throwError("missing provider", logger_1.Logger.errors.UNSUPPORTED_OPERATION, {
                operation: (operation || "_checkProvider")
            });
        }
    };
    Signer.isSigner = function (value) {
        return !!(value && value._isSigner);
    };
    return Signer;
}());
exports.Signer = Signer;
var VoidSigner = /** @class */ (function (_super) {
    __extends(VoidSigner, _super);
    function VoidSigner(address, provider) {
        var _newTarget = this.constructor;
        var _this = this;
        logger.checkNew(_newTarget, VoidSigner);
        _this = _super.call(this) || this;
        properties_1.defineReadOnly(_this, "address", address);
        properties_1.defineReadOnly(_this, "provider", provider || null);
        return _this;
    }
    VoidSigner.prototype.getAddress = function () {
        return Promise.resolve(this.address);
    };
    VoidSigner.prototype._fail = function (message, operation) {
        return Promise.resolve().then(function () {
            logger.throwError(message, logger_1.Logger.errors.UNSUPPORTED_OPERATION, { operation: operation });
        });
    };
    VoidSigner.prototype.signMessage = function (message) {
        return this._fail("VoidSigner cannot sign messages", "signMessage");
    };
    VoidSigner.prototype.signTransaction = function (transaction) {
        return this._fail("VoidSigner cannot sign transactions", "signTransaction");
    };
    VoidSigner.prototype.connect = function (provider) {
        return new VoidSigner(this.address, provider);
    };
    return VoidSigner;
}(Signer));
exports.VoidSigner = VoidSigner;
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