@makerdao/dai
Version:
Library for interacting with the Dai Stablecoin System.
1,340 lines (1,108 loc) • 325 kB
JavaScript
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@makerdao/services-core'), require('lodash/fp'), require('invariant'), require('eth-lib/lib/account'), require('web3-provider-engine/dist/es5/subproviders/wallet'), require('web3-provider-engine/dist/es5'), require('web3-provider-engine/dist/es5/subproviders/websocket'), require('web3-provider-engine/dist/es5/subproviders/rpc'), require('web3-provider-engine/dist/es5/subproviders/subscriptions'), require('web3-provider-engine/dist/es5/subproviders/provider'), require('assert'), require('bignumber.js'), require('debug'), require('tslib'), require('lodash-es'), require('ethers'), require('@makerdao/currency'), require('eventemitter2'), require('isomorphic-fetch'), require('@makerdao/multicall'), require('rxjs'), require('rxjs/operators'), require('util'), require('web3')) :
typeof define === 'function' && define.amd ? define(['exports', '@makerdao/services-core', 'lodash/fp', 'invariant', 'eth-lib/lib/account', 'web3-provider-engine/dist/es5/subproviders/wallet', 'web3-provider-engine/dist/es5', 'web3-provider-engine/dist/es5/subproviders/websocket', 'web3-provider-engine/dist/es5/subproviders/rpc', 'web3-provider-engine/dist/es5/subproviders/subscriptions', 'web3-provider-engine/dist/es5/subproviders/provider', 'assert', 'bignumber.js', 'debug', 'tslib', 'lodash-es', 'ethers', '@makerdao/currency', 'eventemitter2', 'isomorphic-fetch', '@makerdao/multicall', 'rxjs', 'rxjs/operators', 'util', 'web3'], factory) :
(global = global || self, factory(global['@makerdao/dai'] = {}, global.servicesCore, global.fp, global.invariant, global.Account, global.Wallet, global.Web3ProviderEngine, global.WebsocketSubprovider, global.RpcSource, global.SubscriptionSubprovider, global.ProviderSubprovider, global.assert, global.BigNumber, global.debug, global.tslib, global.lodashEs, global.ethers, global.currency, global.EventEmitterObj, global.fetch, global.multicall$1, global.rxjs, global.operators, global.util, global.Web3));
}(this, (function (exports, servicesCore, fp, invariant, Account, Wallet, Web3ProviderEngine, WebsocketSubprovider, RpcSource, SubscriptionSubprovider, ProviderSubprovider, assert, BigNumber, debug, tslib, lodashEs, ethers, currency, EventEmitterObj, fetch, multicall$1, rxjs, operators, util, Web3) { 'use strict';
invariant = invariant && Object.prototype.hasOwnProperty.call(invariant, 'default') ? invariant['default'] : invariant;
Account = Account && Object.prototype.hasOwnProperty.call(Account, 'default') ? Account['default'] : Account;
Wallet = Wallet && Object.prototype.hasOwnProperty.call(Wallet, 'default') ? Wallet['default'] : Wallet;
Web3ProviderEngine = Web3ProviderEngine && Object.prototype.hasOwnProperty.call(Web3ProviderEngine, 'default') ? Web3ProviderEngine['default'] : Web3ProviderEngine;
WebsocketSubprovider = WebsocketSubprovider && Object.prototype.hasOwnProperty.call(WebsocketSubprovider, 'default') ? WebsocketSubprovider['default'] : WebsocketSubprovider;
RpcSource = RpcSource && Object.prototype.hasOwnProperty.call(RpcSource, 'default') ? RpcSource['default'] : RpcSource;
SubscriptionSubprovider = SubscriptionSubprovider && Object.prototype.hasOwnProperty.call(SubscriptionSubprovider, 'default') ? SubscriptionSubprovider['default'] : SubscriptionSubprovider;
ProviderSubprovider = ProviderSubprovider && Object.prototype.hasOwnProperty.call(ProviderSubprovider, 'default') ? ProviderSubprovider['default'] : ProviderSubprovider;
var assert__default = 'default' in assert ? assert['default'] : assert;
BigNumber = BigNumber && Object.prototype.hasOwnProperty.call(BigNumber, 'default') ? BigNumber['default'] : BigNumber;
debug = debug && Object.prototype.hasOwnProperty.call(debug, 'default') ? debug['default'] : debug;
EventEmitterObj = EventEmitterObj && Object.prototype.hasOwnProperty.call(EventEmitterObj, 'default') ? EventEmitterObj['default'] : EventEmitterObj;
fetch = fetch && Object.prototype.hasOwnProperty.call(fetch, 'default') ? fetch['default'] : fetch;
Web3 = Web3 && Object.prototype.hasOwnProperty.call(Web3, 'default') ? Web3['default'] : Web3;
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
try {
var info = gen[key](arg);
var value = info.value;
} catch (error) {
reject(error);
return;
}
if (info.done) {
resolve(value);
} else {
Promise.resolve(value).then(_next, _throw);
}
}
function _asyncToGenerator(fn) {
return function () {
var self = this,
args = arguments;
return new Promise(function (resolve, reject) {
var gen = fn.apply(self, args);
function _next(value) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
}
function _throw(err) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
}
_next(undefined);
});
};
}
function _defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
return Constructor;
}
function _extends() {
_extends = Object.assign || function (target) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i];
for (var key in source) {
if (Object.prototype.hasOwnProperty.call(source, key)) {
target[key] = source[key];
}
}
}
return target;
};
return _extends.apply(this, arguments);
}
function _inheritsLoose(subClass, superClass) {
subClass.prototype = Object.create(superClass.prototype);
subClass.prototype.constructor = subClass;
_setPrototypeOf(subClass, superClass);
}
function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = p;
return o;
};
return _setPrototypeOf(o, p);
}
function _isNativeReflectConstruct() {
if (typeof Reflect === "undefined" || !Reflect.construct) return false;
if (Reflect.construct.sham) return false;
if (typeof Proxy === "function") return true;
try {
Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
return true;
} catch (e) {
return false;
}
}
function _construct(Parent, args, Class) {
if (_isNativeReflectConstruct()) {
_construct = Reflect.construct;
} else {
_construct = function _construct(Parent, args, Class) {
var a = [null];
a.push.apply(a, args);
var Constructor = Function.bind.apply(Parent, a);
var instance = new Constructor();
if (Class) _setPrototypeOf(instance, Class.prototype);
return instance;
};
}
return _construct.apply(null, arguments);
}
function _isNativeFunction(fn) {
return Function.toString.call(fn).indexOf("[native code]") !== -1;
}
function _wrapNativeSuper(Class) {
var _cache = typeof Map === "function" ? new Map() : undefined;
_wrapNativeSuper = function _wrapNativeSuper(Class) {
if (Class === null || !_isNativeFunction(Class)) return Class;
if (typeof Class !== "function") {
throw new TypeError("Super expression must either be null or a function");
}
if (typeof _cache !== "undefined") {
if (_cache.has(Class)) return _cache.get(Class);
_cache.set(Class, Wrapper);
}
function Wrapper() {
return _construct(Class, arguments, _getPrototypeOf(this).constructor);
}
Wrapper.prototype = Object.create(Class.prototype, {
constructor: {
value: Wrapper,
enumerable: false,
writable: true,
configurable: true
}
});
return _setPrototypeOf(Wrapper, Class);
};
return _wrapNativeSuper(Class);
}
function _objectWithoutPropertiesLoose(source, excluded) {
if (source == null) return {};
var target = {};
var sourceKeys = Object.keys(source);
var key, i;
for (i = 0; i < sourceKeys.length; i++) {
key = sourceKeys[i];
if (excluded.indexOf(key) >= 0) continue;
target[key] = source[key];
}
return target;
}
function _assertThisInitialized(self) {
if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return self;
}
function _unsupportedIterableToArray(o, minLen) {
if (!o) return;
if (typeof o === "string") return _arrayLikeToArray(o, minLen);
var n = Object.prototype.toString.call(o).slice(8, -1);
if (n === "Object" && o.constructor) n = o.constructor.name;
if (n === "Map" || n === "Set") return Array.from(o);
if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}
function _arrayLikeToArray(arr, len) {
if (len == null || len > arr.length) len = arr.length;
for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
return arr2;
}
function _createForOfIteratorHelperLoose(o, allowArrayLike) {
var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
if (it) return (it = it.call(o)).next.bind(it);
if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
if (it) o = it;
var i = 0;
return function () {
if (i >= o.length) return {
done: true
};
return {
done: false,
value: o[i++]
};
};
}
throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function createCommonjsModule(fn, module) {
return module = { exports: {} }, fn(module, module.exports), module.exports;
}
var runtime_1 = /*#__PURE__*/createCommonjsModule(function (module) {
/**
* Copyright (c) 2014-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
var runtime = function (exports) {
var Op = Object.prototype;
var hasOwn = Op.hasOwnProperty;
var undefined$1; // More compressible than void 0.
var $Symbol = typeof Symbol === "function" ? Symbol : {};
var iteratorSymbol = $Symbol.iterator || "@@iterator";
var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
function wrap(innerFn, outerFn, self, tryLocsList) {
// If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
var generator = Object.create(protoGenerator.prototype);
var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
// .throw, and .return methods.
generator._invoke = makeInvokeMethod(innerFn, self, context);
return generator;
}
exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
// record like context.tryEntries[i].completion. This interface could
// have been (and was previously) designed to take a closure to be
// invoked without arguments, but in all the cases we care about we
// already have an existing method we want to call, so there's no need
// to create a new function object. We can even get away with assuming
// the method takes exactly one argument, since that happens to be true
// in every case, so we don't have to touch the arguments object. The
// only additional allocation required is the completion record, which
// has a stable shape and so hopefully should be cheap to allocate.
function tryCatch(fn, obj, arg) {
try {
return {
type: "normal",
arg: fn.call(obj, arg)
};
} catch (err) {
return {
type: "throw",
arg: err
};
}
}
var GenStateSuspendedStart = "suspendedStart";
var GenStateSuspendedYield = "suspendedYield";
var GenStateExecuting = "executing";
var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
// breaking out of the dispatch switch statement.
var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
// .constructor.prototype properties for functions that return Generator
// objects. For full spec compliance, you may wish to configure your
// minifier not to mangle the names of these two functions.
function Generator() {}
function GeneratorFunction() {}
function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
// don't natively support it.
var IteratorPrototype = {};
IteratorPrototype[iteratorSymbol] = function () {
return this;
};
var getProto = Object.getPrototypeOf;
var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
// This environment has a native %IteratorPrototype%; use it instead
// of the polyfill.
IteratorPrototype = NativeIteratorPrototype;
}
var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
GeneratorFunctionPrototype.constructor = GeneratorFunction;
GeneratorFunctionPrototype[toStringTagSymbol] = GeneratorFunction.displayName = "GeneratorFunction"; // Helper for defining the .next, .throw, and .return methods of the
// Iterator interface in terms of a single ._invoke method.
function defineIteratorMethods(prototype) {
["next", "throw", "return"].forEach(function (method) {
prototype[method] = function (arg) {
return this._invoke(method, arg);
};
});
}
exports.isGeneratorFunction = function (genFun) {
var ctor = typeof genFun === "function" && genFun.constructor;
return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
// do is to check its .name property.
(ctor.displayName || ctor.name) === "GeneratorFunction" : false;
};
exports.mark = function (genFun) {
if (Object.setPrototypeOf) {
Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
} else {
genFun.__proto__ = GeneratorFunctionPrototype;
if (!(toStringTagSymbol in genFun)) {
genFun[toStringTagSymbol] = "GeneratorFunction";
}
}
genFun.prototype = Object.create(Gp);
return genFun;
}; // Within the body of any async function, `await x` is transformed to
// `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
// `hasOwn.call(value, "__await")` to determine if the yielded value is
// meant to be awaited.
exports.awrap = function (arg) {
return {
__await: arg
};
};
function AsyncIterator(generator, PromiseImpl) {
function invoke(method, arg, resolve, reject) {
var record = tryCatch(generator[method], generator, arg);
if (record.type === "throw") {
reject(record.arg);
} else {
var result = record.arg;
var value = result.value;
if (value && typeof value === "object" && hasOwn.call(value, "__await")) {
return PromiseImpl.resolve(value.__await).then(function (value) {
invoke("next", value, resolve, reject);
}, function (err) {
invoke("throw", err, resolve, reject);
});
}
return PromiseImpl.resolve(value).then(function (unwrapped) {
// When a yielded Promise is resolved, its final value becomes
// the .value of the Promise<{value,done}> result for the
// current iteration.
result.value = unwrapped;
resolve(result);
}, function (error) {
// If a rejected Promise was yielded, throw the rejection back
// into the async generator function so it can be handled there.
return invoke("throw", error, resolve, reject);
});
}
}
var previousPromise;
function enqueue(method, arg) {
function callInvokeWithMethodAndArg() {
return new PromiseImpl(function (resolve, reject) {
invoke(method, arg, resolve, reject);
});
}
return previousPromise = // If enqueue has been called before, then we want to wait until
// all previous Promises have been resolved before calling invoke,
// so that results are always delivered in the correct order. If
// enqueue has not been called before, then it is important to
// call invoke immediately, without waiting on a callback to fire,
// so that the async generator function has the opportunity to do
// any necessary setup in a predictable way. This predictability
// is why the Promise constructor synchronously invokes its
// executor callback, and why async functions synchronously
// execute code before the first await. Since we implement simple
// async functions in terms of async generators, it is especially
// important to get this right, even though it requires care.
previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
// invocations of the iterator.
callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
} // Define the unified helper method that is used to implement .next,
// .throw, and .return (see defineIteratorMethods).
this._invoke = enqueue;
}
defineIteratorMethods(AsyncIterator.prototype);
AsyncIterator.prototype[asyncIteratorSymbol] = function () {
return this;
};
exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
// AsyncIterator objects; they just return a Promise for the value of
// the final result produced by the iterator.
exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
if (PromiseImpl === void 0) PromiseImpl = Promise;
var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
: iter.next().then(function (result) {
return result.done ? result.value : iter.next();
});
};
function makeInvokeMethod(innerFn, self, context) {
var state = GenStateSuspendedStart;
return function invoke(method, arg) {
if (state === GenStateExecuting) {
throw new Error("Generator is already running");
}
if (state === GenStateCompleted) {
if (method === "throw") {
throw arg;
} // Be forgiving, per 25.3.3.3.3 of the spec:
// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
return doneResult();
}
context.method = method;
context.arg = arg;
while (true) {
var delegate = context.delegate;
if (delegate) {
var delegateResult = maybeInvokeDelegate(delegate, context);
if (delegateResult) {
if (delegateResult === ContinueSentinel) continue;
return delegateResult;
}
}
if (context.method === "next") {
// Setting context._sent for legacy support of Babel's
// function.sent implementation.
context.sent = context._sent = context.arg;
} else if (context.method === "throw") {
if (state === GenStateSuspendedStart) {
state = GenStateCompleted;
throw context.arg;
}
context.dispatchException(context.arg);
} else if (context.method === "return") {
context.abrupt("return", context.arg);
}
state = GenStateExecuting;
var record = tryCatch(innerFn, self, context);
if (record.type === "normal") {
// If an exception is thrown from innerFn, we leave state ===
// GenStateExecuting and loop back for another invocation.
state = context.done ? GenStateCompleted : GenStateSuspendedYield;
if (record.arg === ContinueSentinel) {
continue;
}
return {
value: record.arg,
done: context.done
};
} else if (record.type === "throw") {
state = GenStateCompleted; // Dispatch the exception by looping back around to the
// context.dispatchException(context.arg) call above.
context.method = "throw";
context.arg = record.arg;
}
}
};
} // Call delegate.iterator[context.method](context.arg) and handle the
// result, either by returning a { value, done } result from the
// delegate iterator, or by modifying context.method and context.arg,
// setting context.delegate to null, and returning the ContinueSentinel.
function maybeInvokeDelegate(delegate, context) {
var method = delegate.iterator[context.method];
if (method === undefined$1) {
// A .throw or .return when the delegate iterator has no .throw
// method always terminates the yield* loop.
context.delegate = null;
if (context.method === "throw") {
// Note: ["return"] must be used for ES3 parsing compatibility.
if (delegate.iterator["return"]) {
// If the delegate iterator has a return method, give it a
// chance to clean up.
context.method = "return";
context.arg = undefined$1;
maybeInvokeDelegate(delegate, context);
if (context.method === "throw") {
// If maybeInvokeDelegate(context) changed context.method from
// "return" to "throw", let that override the TypeError below.
return ContinueSentinel;
}
}
context.method = "throw";
context.arg = new TypeError("The iterator does not provide a 'throw' method");
}
return ContinueSentinel;
}
var record = tryCatch(method, delegate.iterator, context.arg);
if (record.type === "throw") {
context.method = "throw";
context.arg = record.arg;
context.delegate = null;
return ContinueSentinel;
}
var info = record.arg;
if (!info) {
context.method = "throw";
context.arg = new TypeError("iterator result is not an object");
context.delegate = null;
return ContinueSentinel;
}
if (info.done) {
// Assign the result of the finished delegate to the temporary
// variable specified by delegate.resultName (see delegateYield).
context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).
context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
// exception, let the outer generator proceed normally. If
// context.method was "next", forget context.arg since it has been
// "consumed" by the delegate iterator. If context.method was
// "return", allow the original .return call to continue in the
// outer generator.
if (context.method !== "return") {
context.method = "next";
context.arg = undefined$1;
}
} else {
// Re-yield the result returned by the delegate method.
return info;
} // The delegate iterator is finished, so forget it and continue with
// the outer generator.
context.delegate = null;
return ContinueSentinel;
} // Define Generator.prototype.{next,throw,return} in terms of the
// unified ._invoke helper method.
defineIteratorMethods(Gp);
Gp[toStringTagSymbol] = "Generator"; // A Generator should always return itself as the iterator object when the
// @@iterator function is called on it. Some browsers' implementations of the
// iterator prototype chain incorrectly implement this, causing the Generator
// object to not be returned from this call. This ensures that doesn't happen.
// See https://github.com/facebook/regenerator/issues/274 for more details.
Gp[iteratorSymbol] = function () {
return this;
};
Gp.toString = function () {
return "[object Generator]";
};
function pushTryEntry(locs) {
var entry = {
tryLoc: locs[0]
};
if (1 in locs) {
entry.catchLoc = locs[1];
}
if (2 in locs) {
entry.finallyLoc = locs[2];
entry.afterLoc = locs[3];
}
this.tryEntries.push(entry);
}
function resetTryEntry(entry) {
var record = entry.completion || {};
record.type = "normal";
delete record.arg;
entry.completion = record;
}
function Context(tryLocsList) {
// The root entry object (effectively a try statement without a catch
// or a finally block) gives us a place to store values thrown from
// locations where there is no enclosing try statement.
this.tryEntries = [{
tryLoc: "root"
}];
tryLocsList.forEach(pushTryEntry, this);
this.reset(true);
}
exports.keys = function (object) {
var keys = [];
for (var key in object) {
keys.push(key);
}
keys.reverse(); // Rather than returning an object with a next method, we keep
// things simple and return the next function itself.
return function next() {
while (keys.length) {
var key = keys.pop();
if (key in object) {
next.value = key;
next.done = false;
return next;
}
} // To avoid creating an additional object, we just hang the .value
// and .done properties off the next function object itself. This
// also ensures that the minifier will not anonymize the function.
next.done = true;
return next;
};
};
function values(iterable) {
if (iterable) {
var iteratorMethod = iterable[iteratorSymbol];
if (iteratorMethod) {
return iteratorMethod.call(iterable);
}
if (typeof iterable.next === "function") {
return iterable;
}
if (!isNaN(iterable.length)) {
var i = -1,
next = function next() {
while (++i < iterable.length) {
if (hasOwn.call(iterable, i)) {
next.value = iterable[i];
next.done = false;
return next;
}
}
next.value = undefined$1;
next.done = true;
return next;
};
return next.next = next;
}
} // Return an iterator with no values.
return {
next: doneResult
};
}
exports.values = values;
function doneResult() {
return {
value: undefined$1,
done: true
};
}
Context.prototype = {
constructor: Context,
reset: function reset(skipTempReset) {
this.prev = 0;
this.next = 0; // Resetting context._sent for legacy support of Babel's
// function.sent implementation.
this.sent = this._sent = undefined$1;
this.done = false;
this.delegate = null;
this.method = "next";
this.arg = undefined$1;
this.tryEntries.forEach(resetTryEntry);
if (!skipTempReset) {
for (var name in this) {
// Not sure about the optimal order of these conditions:
if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
this[name] = undefined$1;
}
}
}
},
stop: function stop() {
this.done = true;
var rootEntry = this.tryEntries[0];
var rootRecord = rootEntry.completion;
if (rootRecord.type === "throw") {
throw rootRecord.arg;
}
return this.rval;
},
dispatchException: function dispatchException(exception) {
if (this.done) {
throw exception;
}
var context = this;
function handle(loc, caught) {
record.type = "throw";
record.arg = exception;
context.next = loc;
if (caught) {
// If the dispatched exception was caught by a catch block,
// then let that catch block handle the exception normally.
context.method = "next";
context.arg = undefined$1;
}
return !!caught;
}
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
var entry = this.tryEntries[i];
var record = entry.completion;
if (entry.tryLoc === "root") {
// Exception thrown outside of any try block that could handle
// it, so set the completion value of the entire function to
// throw the exception.
return handle("end");
}
if (entry.tryLoc <= this.prev) {
var hasCatch = hasOwn.call(entry, "catchLoc");
var hasFinally = hasOwn.call(entry, "finallyLoc");
if (hasCatch && hasFinally) {
if (this.prev < entry.catchLoc) {
return handle(entry.catchLoc, true);
} else if (this.prev < entry.finallyLoc) {
return handle(entry.finallyLoc);
}
} else if (hasCatch) {
if (this.prev < entry.catchLoc) {
return handle(entry.catchLoc, true);
}
} else if (hasFinally) {
if (this.prev < entry.finallyLoc) {
return handle(entry.finallyLoc);
}
} else {
throw new Error("try statement without catch or finally");
}
}
}
},
abrupt: function abrupt(type, arg) {
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
var entry = this.tryEntries[i];
if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
var finallyEntry = entry;
break;
}
}
if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
// Ignore the finally entry if control is not jumping to a
// location outside the try/catch block.
finallyEntry = null;
}
var record = finallyEntry ? finallyEntry.completion : {};
record.type = type;
record.arg = arg;
if (finallyEntry) {
this.method = "next";
this.next = finallyEntry.finallyLoc;
return ContinueSentinel;
}
return this.complete(record);
},
complete: function complete(record, afterLoc) {
if (record.type === "throw") {
throw record.arg;
}
if (record.type === "break" || record.type === "continue") {
this.next = record.arg;
} else if (record.type === "return") {
this.rval = this.arg = record.arg;
this.method = "return";
this.next = "end";
} else if (record.type === "normal" && afterLoc) {
this.next = afterLoc;
}
return ContinueSentinel;
},
finish: function finish(finallyLoc) {
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
var entry = this.tryEntries[i];
if (entry.finallyLoc === finallyLoc) {
this.complete(entry.completion, entry.afterLoc);
resetTryEntry(entry);
return ContinueSentinel;
}
}
},
"catch": function _catch(tryLoc) {
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
var entry = this.tryEntries[i];
if (entry.tryLoc === tryLoc) {
var record = entry.completion;
if (record.type === "throw") {
var thrown = record.arg;
resetTryEntry(entry);
}
return thrown;
}
} // The context.catch method must only be called with a location
// argument that corresponds to a known catch block.
throw new Error("illegal catch attempt");
},
delegateYield: function delegateYield(iterable, resultName, nextLoc) {
this.delegate = {
iterator: values(iterable),
resultName: resultName,
nextLoc: nextLoc
};
if (this.method === "next") {
// Deliberately forget the last sent value so that we don't
// accidentally pass it on to the delegate.
this.arg = undefined$1;
}
return ContinueSentinel;
}
}; // Regardless of whether this script is executing as a CommonJS module
// or not, return the runtime object so that we can declare the variable
// regeneratorRuntime in the outer scope, which allows this module to be
// injected easily by `bin/regenerator --include-runtime script.js`.
return exports;
}( // If this script is executing as a CommonJS module, use module.exports
// as the regeneratorRuntime namespace. Otherwise create a new empty
// object. Either way, the resulting object will be used to initialize
// the regeneratorRuntime variable at the top of this file.
module.exports );
try {
regeneratorRuntime = runtime;
} catch (accidentalStrictMode) {
// This module should not be running in strict mode, so the above
// assignment should always work unless something is misconfigured. Just
// in case runtime.js accidentally runs in strict mode, we can escape
// strict mode using a global Function call. This could conceivably fail
// if a Content Security Policy forbids using Function, but in that case
// the proper solution is to fix the accidental strict mode problem. If
// you've misconfigured your bundler to force strict mode and applied a
// CSP to forbid Function, and you're not willing to fix either of those
// problems, please detail your unique predicament in a GitHub issue.
Function("r", "regeneratorRuntime = r")(runtime);
}
});
var ProviderType = {
INFURA: 'INFURA',
HTTP: 'HTTP',
WEBSOCKET: 'WEBSOCKET',
// a browser provider is one that comes from the browser, i.e. `window.web3`,
// or from MetaMask's new "postMessage" method of requesting a provider.
BROWSER: 'BROWSER',
// A provider constructed outside this library and injected as-is
INJECT: 'INJECT'
};
var DEFAULT_POLLING_INTERVAL = 4000;
function setupEngine(_x) {
return _setupEngine.apply(this, arguments);
}
function _setupEngine() {
_setupEngine = _asyncToGenerator( /*#__PURE__*/runtime_1.mark(function _callee(settings) {
var _settings$web, providerSettings, pollingInterval, engine, result, getHttpProvider, getWebsocketProvider, getInjectedProvider;
return runtime_1.wrap(function _callee$(_context) {
while (1) {
switch (_context.prev = _context.next) {
case 0:
_settings$web = settings.web3, providerSettings = _settings$web.provider, pollingInterval = _settings$web.pollingInterval;
engine = new Web3ProviderEngine({
pollingInterval: pollingInterval || DEFAULT_POLLING_INTERVAL
});
result = {
engine: engine
};
getHttpProvider = function getHttpProvider() {
var rpcUrl = getRpcUrl(providerSettings);
var subscriptionProvider = new SubscriptionSubprovider();
subscriptionProvider.on('data', function (err, data) {
return engine.emit('data', err, data);
});
engine.addProvider(subscriptionProvider);
return new RpcSource({
rpcUrl: rpcUrl
});
};
getWebsocketProvider = function getWebsocketProvider() {
var rpcUrl = getRpcUrl(providerSettings);
var subscriptionProvider = new SubscriptionSubprovider();
subscriptionProvider.on('data', function (err, data) {
return engine.emit('data', err, data);
});
engine.addProvider(subscriptionProvider);
return new WebsocketSubprovider({
rpcUrl: rpcUrl
});
};
getInjectedProvider = function getInjectedProvider() {
if (!providerSettings.inject) {
throw new Error("'inject' must be supplied with ProviderType.INJECT");
}
return new ProviderSubprovider(providerSettings.inject);
};
_context.t0 = providerSettings.type;
_context.next = _context.t0 === ProviderType.BROWSER ? 9 : _context.t0 === ProviderType.WEBSOCKET ? 13 : _context.t0 === ProviderType.HTTP ? 15 : _context.t0 === ProviderType.INFURA ? 17 : _context.t0 === ProviderType.INJECT ? 19 : 21;
break;
case 9:
_context.next = 11;
return getBrowserProvider();
case 11:
result.provider = _context.sent;
return _context.abrupt("break", 22);
case 13:
result.provider = getWebsocketProvider();
return _context.abrupt("break", 22);
case 15:
result.provider = getHttpProvider();
return _context.abrupt("break", 22);
case 17:
result.provider = providerSettings.protocol === 'wss' ? getWebsocketProvider() : getHttpProvider();
return _context.abrupt("break", 22);
case 19:
result.provider = getInjectedProvider();
return _context.abrupt("break", 22);
case 21:
throw new Error('provider type must be defined');
case 22:
engine.addProvider(result.provider);
return _context.abrupt("return", result);
case 24:
case "end":
return _context.stop();
}
}
}, _callee);
}));
return _setupEngine.apply(this, arguments);
}
function getBrowserProvider() {
return _getBrowserProvider.apply(this, arguments);
}
function _getBrowserProvider() {
_getBrowserProvider = _asyncToGenerator( /*#__PURE__*/runtime_1.mark(function _callee2() {
var wrap;
return runtime_1.wrap(function _callee2$(_context2) {
while (1) {
switch (_context2.prev = _context2.next) {
case 0:
if (!(typeof window === 'undefined')) {
_context2.next = 2;
break;
}
throw new Error('Cannot use ProviderType.BROWSER because window is undefined');
case 2:
wrap = function wrap(provider) {
var subprovider = new ProviderSubprovider(provider);
subprovider.isWindowProvider = true;
return subprovider;
};
if (!window.ethereum) {
_context2.next = 9;
break;
}
_context2.next = 6;
return window.ethereum.enable();
case 6:
return _context2.abrupt("return", wrap(window.ethereum));
case 9:
if (!window.web3) {
_context2.next = 11;
break;
}
return _context2.abrupt("return", wrap(window.web3.currentProvider));
case 11:
case "end":
return _context2.stop();
}
}
}, _callee2);
}));
return _getBrowserProvider.apply(this, arguments);
}
function getInfuraUrl(protocol, network, infuraProjectId) {
if (protocol === void 0) {
protocol = 'https';
}
if (!infuraProjectId) {
throw new Error('Cannot use infura without a project ID');
}
var url = protocol + "://" + network + ".infura.io";
url += protocol === 'wss' ? '/ws' : '';
url += "/v3/" + infuraProjectId;
return url;
}
function getRpcUrl(providerSettings) {
var network = providerSettings.network,
protocol = providerSettings.protocol,
infuraProjectId = providerSettings.infuraProjectId,
type = providerSettings.type,
url = providerSettings.url;
switch (type) {
case ProviderType.HTTP:
return url;
case ProviderType.WEBSOCKET:
return url;
case ProviderType.INFURA:
return getInfuraUrl(protocol, network, infuraProjectId);
default:
throw new Error('Invalid web3 provider type: ' + type);
}
}
function privateKeyAccountFactory(_ref) {
var key = _ref.key;
if (typeof key != 'string' || !key.match(/^(0x)?[0-9a-fA-F]{64}$/)) {
throw new Error('Invalid private key format');
}
var _ref2 = key.startsWith('0x') ? [key, key.replace(/^0x/, '')] : ['0x' + key, key],
keyWithPreffix = _ref2[0],
keySansPrefix = _ref2[1];
var account = Account.fromPrivate(keyWithPreffix);
var keyBuffer = Buffer.from(keySansPrefix, 'hex');
var subprovider = new Wallet({
getAddressString: function getAddressString() {
return account.address.toLowerCase();
},
getPrivateKey: function getPrivateKey() {
return keyBuffer;
}
}, {});
return {
subprovider: subprovider,
address: account.address
};
}
function getAccountAddress(_x, _x2) {
return _getAccountAddress.apply(this, arguments);
}
function _getAccountAddress() {
_getAccountAddress = _asyncToGenerator( /*#__PURE__*/runtime_1.mark(function _callee(subprovider, _temp) {
var _ref4, _ref4$offset, offset, address;
return runtime_1.wrap(function _callee$(_context) {
while (1) {
switch (_context.prev = _context.next) {
case 0:
_ref4 = _temp === void 0 ? {} : _temp, _ref4$offset = _ref4.offset, offset = _ref4$offset === void 0 ? 0 : _ref4$offset, address = _ref4.address;
assert__default(!(offset && address), 'Cannot set both address and offset');
return _context.abrupt("return", new Promise(function (resolve, reject) {
return subprovider.handleRequest({
method: 'eth_accounts',
params: [],
id: 1
}, null, function (err, val) {
if (err) return reject(err);
if (address) {
var matchingAddress = val.find(function (a) {
return a.toLowerCase() === address.toLowerCase();
});
assert__default(matchingAddress, 'No matching address found in provider.');
resolve(matchingAddress.toLowerCase());
} else {
resolve(typeof val[offset] === 'string' ? val[offset].toLowerCase() : val[offset]);
}
});
}));
case 3:
case "end":
return _context.stop();
}
}
}, _callee);
}));
return _getAccountAddress.apply(this, arguments);
}
function providerAccountFactory(_x3, _x4) {
return _providerAccountFactory.apply(this, arguments);
}
function _providerAccountFactory() {
_providerAccountFactory = _asyncToGenerator( /*#__PURE__*/runtime_1.mark(function _callee2(_ref3, provider) {
var offset, address, subprovider;
return runtime_1.wrap(function _callee2$(_context2) {
while (1) {
switch (_context2.prev = _context2.next) {
case 0:
offset = _ref3.offset, address = _ref3.address;
// we need to be able to swap out this account while leaving the original
// provider in place for other accounts, so the subprovider here has to be
// a different instance. using Proxy is a simple way to accomplish this.
subprovider = new Proxy(provider, {});
_context2.t0 = subprovider;
_context2.next = 5;
return getAccountAddress(subprovider, {
offset: offset,
address: address
});
case 5:
_context2.t1 = _context2.sent;
return _context2.abrupt("return", {
subprovider: _context2.t0,
address: _context2.t1
});
case 7:
case "end":
return _context2.stop();
}
}
}, _callee2);
}));
return _providerAccountFactory.apply(this, arguments);
}
function browserProviderAccountFactory() {
return _browserProviderAccountFactory.apply(this, arguments);
}
function _browserProviderAccountFactory() {
_browserProviderAccountFactory = _asyncToGenerator( /*#__PURE__*/runtime_1.mark(function _callee3() {
var subprovider;
return runtime_1.wrap(function _callee3$(_context3) {
while (1) {
switch (_context3.prev = _context3.next) {
case 0:
_context3.next = 2;
return getBrowserProvider();
case 2:
subprovider = _context3.sent;
_context3.t0 = subprovider;
_context3.next = 6;
return getAccountAddress(subprovider);
case 6:
_context3.t1 = _context3.sent;
return _context3.abrupt("return", {
subprovider: _context3.t0,
address: _context3.t1
});
case 8:
case "end":
return _context3.stop();
}
}
}, _callee3);
}));
return _browserProviderAccountFactory.apply(this, arguments);
}
var UINT256_MAX = '0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
var AccountType = {
PROVIDER: 'provider',
PRIVATE_KEY: 'privateKey',
BROWSER: 'browser'
};
var _excluded = ["type", "autoSwitch"];
var log = /*#__PURE__*/debug('dai:AccountsService');
var sanitizeAccount = /*#__PURE__*/fp.pick(['name', 'type', 'address']);
var AccountsService = /*#__PURE__*/function (_PublicService) {
_inheritsLoose(AccountsService, _PublicService);
function AccountsService(name) {
var _this;
if (name === void 0) {
name = 'accounts';
}
_this = _PublicService.call(this, name, ['event']) || this;
_this._accounts = {};
_this._accountFactories = {
privateKey: privateKeyAccountFactory,
provider: providerAccountFactory,
browser: browserProviderAccountFactory
};
return _this;
}
var _proto = AccountsService.prototype;
_proto.initialize = /*#__PURE__*/function () {
var _initialize = /*#__PURE__*/_asyncToGenerator( /*#__PURE__*/runtime_1.mark(function _callee(settings) {
var result;
return runtime_1.wrap(function _callee$(