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/**
* The available providers should suffice for most developers purposes,
* but the [[AbstractProvider]] class has many features which enable
* sub-classing it for specific purposes.
*
* @_section: api/providers/abstract-provider: Subclassing Provider [abstract-provider]
*/
// @TODO
// Event coalescence
// When we register an event with an async value (e.g. address is a Signer
// or ENS name), we need to add it immeidately for the Event API, but also
// need time to resolve the address. Upon resolving the address, we need to
// migrate the listener to the static event. We also need to maintain a map
// of Signer/ENS name to address so we can sync respond to listenerCount.
import { getAddress, resolveAddress } from "../address/index.js";
import { ZeroAddress } from "../constants/index.js";
import { Contract } from "../contract/index.js";
import { namehash } from "../hash/index.js";
import { Transaction } from "../transaction/index.js";
import {
concat, dataLength, dataSlice, hexlify, isHexString,
getBigInt, getBytes, getNumber,
isCallException, isError, makeError, assert, assertArgument,
FetchRequest,
toBeArray, toQuantity,
defineProperties, EventPayload, resolveProperties,
toUtf8String
} from "../utils/index.js";
import { EnsResolver } from "./ens-resolver.js";
import {
formatBlock, formatLog, formatTransactionReceipt, formatTransactionResponse
} from "./format.js";
import { Network } from "./network.js";
import { copyRequest, Block, FeeData, Log, TransactionReceipt, TransactionResponse } from "./provider.js";
import {
PollingBlockSubscriber, PollingBlockTagSubscriber, PollingEventSubscriber,
PollingOrphanSubscriber, PollingTransactionSubscriber
} from "./subscriber-polling.js";
import type { Addressable, AddressLike } from "../address/index.js";
import type { BigNumberish, BytesLike } from "../utils/index.js";
import type { FetchResponse, Listener } from "../utils/index.js";
import type { Networkish } from "./network.js";
import type { FetchUrlFeeDataNetworkPlugin } from "./plugins-network.js";
//import type { MaxPriorityFeePlugin } from "./plugins-network.js";
import type {
BlockParams, LogParams, TransactionReceiptParams,
TransactionResponseParams
} from "./formatting.js";
import type {
BlockTag, EventFilter, Filter, FilterByBlockHash, OrphanFilter,
PreparedTransactionRequest, Provider, ProviderEvent,
TransactionRequest
} from "./provider.js";
type Timer = ReturnType<typeof setTimeout>;
// Constants
const BN_2 = BigInt(2);
const MAX_CCIP_REDIRECTS = 10;
function isPromise<T = any>(value: any): value is Promise<T> {
return (value && typeof(value.then) === "function");
}
function getTag(prefix: string, value: any): string {
return prefix + ":" + JSON.stringify(value, (k, v) => {
if (v == null) { return "null"; }
if (typeof(v) === "bigint") { return `bigint:${ v.toString() }`}
if (typeof(v) === "string") { return v.toLowerCase(); }
// Sort object keys
if (typeof(v) === "object" && !Array.isArray(v)) {
const keys = Object.keys(v);
keys.sort();
return keys.reduce((accum, key) => {
accum[key] = v[key];
return accum;
}, <any>{ });
}
return v;
});
}
/**
* The types of additional event values that can be emitted for the
* ``"debug"`` event.
*/
export type DebugEventAbstractProvider = {
action: "sendCcipReadFetchRequest",
request: FetchRequest
index: number
urls: Array<string>
} | {
action: "receiveCcipReadFetchResult",
request: FetchRequest,
result: any
} | {
action: "receiveCcipReadFetchError",
request: FetchRequest,
result: any
} | {
action: "sendCcipReadCall",
transaction: { to: string, data: string }
} | {
action: "receiveCcipReadCallResult",
transaction: { to: string, data: string }
result: string
} | {
action: "receiveCcipReadCallError",
transaction: { to: string, data: string }
error: Error
};
/**
* The value passed to the [[AbstractProvider-_getSubscriber]] method.
*
* Only developers sub-classing [[AbstractProvider[[ will care about this,
* if they are modifying a low-level feature of how subscriptions operate.
*/
export type Subscription = {
type: "block" | "close" | "debug" | "error" | "finalized" | "network" | "pending" | "safe",
tag: string
} | {
type: "transaction",
tag: string,
hash: string
} | {
type: "event",
tag: string,
filter: EventFilter
} | {
type: "orphan",
tag: string,
filter: OrphanFilter
};
/**
* A **Subscriber** manages a subscription.
*
* Only developers sub-classing [[AbstractProvider[[ will care about this,
* if they are modifying a low-level feature of how subscriptions operate.
*/
export interface Subscriber {
/**
* Called initially when a subscriber is added the first time.
*/
start(): void;
/**
* Called when there are no more subscribers to the event.
*/
stop(): void;
/**
* Called when the subscription should pause.
*
* If %%dropWhilePaused%%, events that occur while paused should not
* be emitted [[resume]].
*/
pause(dropWhilePaused?: boolean): void;
/**
* Resume a paused subscriber.
*/
resume(): void;
/**
* The frequency (in ms) to poll for events, if polling is used by
* the subscriber.
*
* For non-polling subscribers, this must return ``undefined``.
*/
pollingInterval?: number;
}
/**
* An **UnmanagedSubscriber** is useful for events which do not require
* any additional management, such as ``"debug"`` which only requires
* emit in synchronous event loop triggered calls.
*/
export class UnmanagedSubscriber implements Subscriber {
/**
* The name fof the event.
*/
name!: string;
/**
* Create a new UnmanagedSubscriber with %%name%%.
*/
constructor(name: string) { defineProperties<UnmanagedSubscriber>(this, { name }); }
start(): void { }
stop(): void { }
pause(dropWhilePaused?: boolean): void { }
resume(): void { }
}
type Sub = {
tag: string;
nameMap: Map<string, string>
addressableMap: WeakMap<Addressable, string>;
listeners: Array<{ listener: Listener, once: boolean }>;
// @TODO: get rid of this, as it is (and has to be)
// tracked in subscriber
started: boolean;
subscriber: Subscriber;
};
function copy<T = any>(value: T): T {
return JSON.parse(JSON.stringify(value));
}
function concisify(items: Array<string>): Array<string> {
items = Array.from((new Set(items)).values())
items.sort();
return items;
}
async function getSubscription(_event: ProviderEvent, provider: AbstractProvider): Promise<Subscription> {
if (_event == null) { throw new Error("invalid event"); }
// Normalize topic array info an EventFilter
if (Array.isArray(_event)) { _event = { topics: _event }; }
if (typeof(_event) === "string") {
switch (_event) {
case "block":
case "debug":
case "error":
case "finalized":
case "network":
case "pending":
case "safe": {
return { type: _event, tag: _event };
}
}
}
if (isHexString(_event, 32)) {
const hash = _event.toLowerCase();
return { type: "transaction", tag: getTag("tx", { hash }), hash };
}
if ((<any>_event).orphan) {
const event = <OrphanFilter>_event;
// @TODO: Should lowercase and whatnot things here instead of copy...
return { type: "orphan", tag: getTag("orphan", event), filter: copy(event) };
}
if (((<any>_event).address || (<any>_event).topics)) {
const event = <EventFilter>_event;
const filter: any = {
topics: ((event.topics || []).map((t) => {
if (t == null) { return null; }
if (Array.isArray(t)) {
return concisify(t.map((t) => t.toLowerCase()));
}
return t.toLowerCase();
}))
};
if (event.address) {
const addresses: Array<string> = [ ];
const promises: Array<Promise<void>> = [ ];
const addAddress = (addr: AddressLike) => {
if (isHexString(addr)) {
addresses.push(addr);
} else {
promises.push((async () => {
addresses.push(await resolveAddress(addr, provider));
})());
}
}
if (Array.isArray(event.address)) {
event.address.forEach(addAddress);
} else {
addAddress(event.address);
}
if (promises.length) { await Promise.all(promises); }
filter.address = concisify(addresses.map((a) => a.toLowerCase()));
}
return { filter, tag: getTag("event", filter), type: "event" };
}
assertArgument(false, "unknown ProviderEvent", "event", _event);
}
function getTime(): number { return (new Date()).getTime(); }
/**
* An **AbstractPlugin** is used to provide additional internal services
* to an [[AbstractProvider]] without adding backwards-incompatible changes
* to method signatures or other internal and complex logic.
*/
export interface AbstractProviderPlugin {
/**
* The reverse domain notation of the plugin.
*/
readonly name: string;
/**
* Creates a new instance of the plugin, connected to %%provider%%.
*/
connect(provider: AbstractProvider): AbstractProviderPlugin;
}
/**
* A normalized filter used for [[PerformActionRequest]] objects.
*/
export type PerformActionFilter = {
address?: string | Array<string>;
topics?: Array<null | string | Array<string>>;
fromBlock?: BlockTag;
toBlock?: BlockTag;
} | {
address?: string | Array<string>;
topics?: Array<null | string | Array<string>>;
blockHash?: string;
};
/**
* A normalized transactions used for [[PerformActionRequest]] objects.
*/
export interface PerformActionTransaction extends PreparedTransactionRequest {
/**
* The ``to`` address of the transaction.
*/
to?: string;
/**
* The sender of the transaction.
*/
from?: string;
}
/**
* The [[AbstractProvider]] methods will normalize all values and pass this
* type to [[AbstractProvider-_perform]].
*/
export type PerformActionRequest = {
method: "broadcastTransaction",
signedTransaction: string
} | {
method: "call",
transaction: PerformActionTransaction, blockTag: BlockTag
} | {
method: "chainId"
} | {
method: "estimateGas",
transaction: PerformActionTransaction
} | {
method: "getBalance",
address: string, blockTag: BlockTag
} | {
method: "getBlock",
blockTag: BlockTag, includeTransactions: boolean
} | {
method: "getBlock",
blockHash: string, includeTransactions: boolean
} | {
method: "getBlockNumber"
} | {
method: "getCode",
address: string, blockTag: BlockTag
} | {
method: "getGasPrice"
} | {
method: "getLogs",
filter: PerformActionFilter
} | {
method: "getPriorityFee"
} | {
method: "getStorage",
address: string, position: bigint, blockTag: BlockTag
} | {
method: "getTransaction",
hash: string
} | {
method: "getTransactionCount",
address: string, blockTag: BlockTag
} | {
method: "getTransactionReceipt",
hash: string
} | {
method: "getTransactionResult",
hash: string
};
type _PerformAccountRequest = {
method: "getBalance" | "getTransactionCount" | "getCode"
} | {
method: "getStorage", position: bigint
}
/**
* Options for configuring some internal aspects of an [[AbstractProvider]].
*
* **``cacheTimeout``** - how long to cache a low-level ``_perform``
* for, based on input parameters. This reduces the number of calls
* to getChainId and getBlockNumber, but may break test chains which
* can perform operations (internally) synchronously. Use ``-1`` to
* disable, ``0`` will only buffer within the same event loop and
* any other value is in ms. (default: ``250``)
*/
export type AbstractProviderOptions = {
cacheTimeout?: number;
pollingInterval?: number;
};
const defaultOptions = {
cacheTimeout: 250,
pollingInterval: 4000
};
type CcipArgs = {
sender: string;
urls: Array<string>;
calldata: string;
selector: string;
extraData: string;
errorArgs: Array<any>
};
/**
* An **AbstractProvider** provides a base class for other sub-classes to
* implement the [[Provider]] API by normalizing input arguments and
* formatting output results as well as tracking events for consistent
* behaviour on an eventually-consistent network.
*/
export class AbstractProvider implements Provider {
#subs: Map<string, Sub>;
#plugins: Map<string, AbstractProviderPlugin>;
// null=unpaused, true=paused+dropWhilePaused, false=paused
#pausedState: null | boolean;
#destroyed: boolean;
#networkPromise: null | Promise<Network>;
readonly #anyNetwork: boolean;
#performCache: Map<string, Promise<any>>;
// The most recent block number if running an event or -1 if no "block" event
#lastBlockNumber: number;
#nextTimer: number;
#timers: Map<number, { timer: null | Timer, func: () => void, time: number }>;
#disableCcipRead: boolean;
#options: Required<AbstractProviderOptions>;
/**
* Create a new **AbstractProvider** connected to %%network%%, or
* use the various network detection capabilities to discover the
* [[Network]] if necessary.
*/
constructor(_network?: "any" | Networkish, options?: AbstractProviderOptions) {
this.#options = Object.assign({ }, defaultOptions, options || { });
if (_network === "any") {
this.#anyNetwork = true;
this.#networkPromise = null;
} else if (_network) {
const network = Network.from(_network);
this.#anyNetwork = false;
this.#networkPromise = Promise.resolve(network);
setTimeout(() => { this.emit("network", network, null); }, 0);
} else {
this.#anyNetwork = false;
this.#networkPromise = null;
}
this.#lastBlockNumber = -1;
this.#performCache = new Map();
this.#subs = new Map();
this.#plugins = new Map();
this.#pausedState = null;
this.#destroyed = false;
this.#nextTimer = 1;
this.#timers = new Map();
this.#disableCcipRead = false;
}
get pollingInterval(): number { return this.#options.pollingInterval; }
/**
* Returns ``this``, to allow an **AbstractProvider** to implement
* the [[ContractRunner]] interface.
*/
get provider(): this { return this; }
/**
* Returns all the registered plug-ins.
*/
get plugins(): Array<AbstractProviderPlugin> {
return Array.from(this.#plugins.values());
}
/**
* Attach a new plug-in.
*/
attachPlugin(plugin: AbstractProviderPlugin): this {
if (this.#plugins.get(plugin.name)) {
throw new Error(`cannot replace existing plugin: ${ plugin.name } `);
}
this.#plugins.set(plugin.name, plugin.connect(this));
return this;
}
/**
* Get a plugin by name.
*/
getPlugin<T extends AbstractProviderPlugin = AbstractProviderPlugin>(name: string): null | T {
return <T>(this.#plugins.get(name)) || null;
}
/**
* Prevent any CCIP-read operation, regardless of whether requested
* in a [[call]] using ``enableCcipRead``.
*/
get disableCcipRead(): boolean { return this.#disableCcipRead; }
set disableCcipRead(value: boolean) { this.#disableCcipRead = !!value; }
// Shares multiple identical requests made during the same 250ms
async #perform<T = any>(req: PerformActionRequest): Promise<T> {
const timeout = this.#options.cacheTimeout;
// Caching disabled
if (timeout < 0) { return await this._perform(req); }
// Create a tag
const tag = getTag(req.method, req);
let perform = this.#performCache.get(tag);
if (!perform) {
perform = this._perform(req);
this.#performCache.set(tag, perform);
setTimeout(() => {
if (this.#performCache.get(tag) === perform) {
this.#performCache.delete(tag);
}
}, timeout);
}
return await perform;
}
/**
* Resolves to the data for executing the CCIP-read operations.
*/
async ccipReadFetch(tx: PerformActionTransaction, calldata: string, urls: Array<string>): Promise<null | string> {
if (this.disableCcipRead || urls.length === 0 || tx.to == null) { return null; }
const sender = tx.to.toLowerCase();
const data = calldata.toLowerCase();
const errorMessages: Array<string> = [ ];
for (let i = 0; i < urls.length; i++) {
const url = urls[i];
// URL expansion
const href = url.replace("{sender}", sender).replace("{data}", data);
// If no {data} is present, use POST; otherwise GET
//const json: string | null = (url.indexOf("{data}") >= 0) ? null: JSON.stringify({ data, sender });
//const result = await fetchJson({ url: href, errorPassThrough: true }, json, (value, response) => {
// value.status = response.statusCode;
// return value;
//});
const request = new FetchRequest(href);
if (url.indexOf("{data}") === -1) {
request.body = { data, sender };
}
this.emit("debug", { action: "sendCcipReadFetchRequest", request, index: i, urls });
let errorMessage = "unknown error";
// Fetch the resource...
let resp: FetchResponse;
try {
resp = await request.send();
} catch (error: any) {
// ...low-level fetch error (missing host, bad SSL, etc.),
// so try next URL
errorMessages.push(error.message);
this.emit("debug", { action: "receiveCcipReadFetchError", request, result: { error } });
continue;
}
try {
const result = resp.bodyJson;
if (result.data) {
this.emit("debug", { action: "receiveCcipReadFetchResult", request, result });
return result.data;
}
if (result.message) { errorMessage = result.message; }
this.emit("debug", { action: "receiveCcipReadFetchError", request, result });
} catch (error) { }
// 4xx indicates the result is not present; stop
assert(resp.statusCode < 400 || resp.statusCode >= 500, `response not found during CCIP fetch: ${ errorMessage }`,
"OFFCHAIN_FAULT", { reason: "404_MISSING_RESOURCE", transaction: tx, info: { url, errorMessage } });
// 5xx indicates server issue; try the next url
errorMessages.push(errorMessage);
}
assert(false, `error encountered during CCIP fetch: ${ errorMessages.map((m) => JSON.stringify(m)).join(", ") }`, "OFFCHAIN_FAULT", {
reason: "500_SERVER_ERROR",
transaction: tx, info: { urls, errorMessages }
});
}
/**
* Provides the opportunity for a sub-class to wrap a block before
* returning it, to add additional properties or an alternate
* sub-class of [[Block]].
*/
_wrapBlock(value: BlockParams, network: Network): Block {
return new Block(formatBlock(value), this);
}
/**
* Provides the opportunity for a sub-class to wrap a log before
* returning it, to add additional properties or an alternate
* sub-class of [[Log]].
*/
_wrapLog(value: LogParams, network: Network): Log {
return new Log(formatLog(value), this);
}
/**
* Provides the opportunity for a sub-class to wrap a transaction
* receipt before returning it, to add additional properties or an
* alternate sub-class of [[TransactionReceipt]].
*/
_wrapTransactionReceipt(value: TransactionReceiptParams, network: Network): TransactionReceipt {
return new TransactionReceipt(formatTransactionReceipt(value), this);
}
/**
* Provides the opportunity for a sub-class to wrap a transaction
* response before returning it, to add additional properties or an
* alternate sub-class of [[TransactionResponse]].
*/
_wrapTransactionResponse(tx: TransactionResponseParams, network: Network): TransactionResponse {
return new TransactionResponse(formatTransactionResponse(tx), this);
}
/**
* Resolves to the Network, forcing a network detection using whatever
* technique the sub-class requires.
*
* Sub-classes **must** override this.
*/
_detectNetwork(): Promise<Network> {
assert(false, "sub-classes must implement this", "UNSUPPORTED_OPERATION", {
operation: "_detectNetwork"
});
}
/**
* Sub-classes should use this to perform all built-in operations. All
* methods sanitizes and normalizes the values passed into this.
*
* Sub-classes **must** override this.
*/
async _perform<T = any>(req: PerformActionRequest): Promise<T> {
assert(false, `unsupported method: ${ req.method }`, "UNSUPPORTED_OPERATION", {
operation: req.method,
info: req
});
}
// State
async getBlockNumber(): Promise<number> {
const blockNumber = getNumber(await this.#perform({ method: "getBlockNumber" }), "%response");
if (this.#lastBlockNumber >= 0) { this.#lastBlockNumber = blockNumber; }
return blockNumber;
}
/**
* Returns or resolves to the address for %%address%%, resolving ENS
* names and [[Addressable]] objects and returning if already an
* address.
*/
_getAddress(address: AddressLike): string | Promise<string> {
return resolveAddress(address, this);
}
/**
* Returns or resolves to a valid block tag for %%blockTag%%, resolving
* negative values and returning if already a valid block tag.
*/
_getBlockTag(blockTag?: BlockTag): string | Promise<string> {
if (blockTag == null) { return "latest"; }
switch (blockTag) {
case "earliest":
return "0x0";
case "finalized":
case "latest":
case "pending":
case "safe":
return blockTag;
}
if (isHexString(blockTag)) {
if (isHexString(blockTag, 32)) { return blockTag; }
return toQuantity(blockTag);
}
if (typeof(blockTag) === "bigint") {
blockTag = getNumber(blockTag, "blockTag");
}
if (typeof(blockTag) === "number") {
if (blockTag >= 0) { return toQuantity(blockTag); }
if (this.#lastBlockNumber >= 0) { return toQuantity(this.#lastBlockNumber + blockTag); }
return this.getBlockNumber().then((b) => toQuantity(b + <number>blockTag));
}
assertArgument(false, "invalid blockTag", "blockTag", blockTag);
}
/**
* Returns or resolves to a filter for %%filter%%, resolving any ENS
* names or [[Addressable]] object and returning if already a valid
* filter.
*/
_getFilter(filter: Filter | FilterByBlockHash): PerformActionFilter | Promise<PerformActionFilter> {
// Create a canonical representation of the topics
const topics = (filter.topics || [ ]).map((t) => {
if (t == null) { return null; }
if (Array.isArray(t)) {
return concisify(t.map((t) => t.toLowerCase()));
}
return t.toLowerCase();
});
const blockHash = ("blockHash" in filter) ? filter.blockHash: undefined;
const resolve = (_address: Array<string>, fromBlock?: string, toBlock?: string) => {
let address: undefined | string | Array<string> = undefined;
switch (_address.length) {
case 0: break;
case 1:
address = _address[0];
break;
default:
_address.sort();
address = _address;
}
if (blockHash) {
if (fromBlock != null || toBlock != null) {
throw new Error("invalid filter");
}
}
const filter = <any>{ };
if (address) { filter.address = address; }
if (topics.length) { filter.topics = topics; }
if (fromBlock) { filter.fromBlock = fromBlock; }
if (toBlock) { filter.toBlock = toBlock; }
if (blockHash) { filter.blockHash = blockHash; }
return filter;
};
// Addresses could be async (ENS names or Addressables)
let address: Array<string | Promise<string>> = [ ];
if (filter.address) {
if (Array.isArray(filter.address)) {
for (const addr of filter.address) { address.push(this._getAddress(addr)); }
} else {
address.push(this._getAddress(filter.address));
}
}
let fromBlock: undefined | string | Promise<string> = undefined;
if ("fromBlock" in filter) { fromBlock = this._getBlockTag(filter.fromBlock); }
let toBlock: undefined | string | Promise<string> = undefined;
if ("toBlock" in filter) { toBlock = this._getBlockTag(filter.toBlock); }
if (address.filter((a) => (typeof(a) !== "string")).length ||
(fromBlock != null && typeof(fromBlock) !== "string") ||
(toBlock != null && typeof(toBlock) !== "string")) {
return Promise.all([ Promise.all(address), fromBlock, toBlock ]).then((result) => {
return resolve(result[0], result[1], result[2]);
});
}
return resolve(<Array<string>>address, fromBlock, toBlock);
}
/**
* Returns or resolves to a transaction for %%request%%, resolving
* any ENS names or [[Addressable]] and returning if already a valid
* transaction.
*/
_getTransactionRequest(_request: TransactionRequest): PerformActionTransaction | Promise<PerformActionTransaction> {
const request = <PerformActionTransaction>copyRequest(_request);
const promises: Array<Promise<void>> = [ ];
[ "to", "from" ].forEach((key) => {
if ((<any>request)[key] == null) { return; }
const addr = resolveAddress((<any>request)[key], this);
if (isPromise(addr)) {
promises.push((async function() { (<any>request)[key] = await addr; })());
} else {
(<any>request)[key] = addr;
}
});
if (request.blockTag != null) {
const blockTag = this._getBlockTag(request.blockTag);
if (isPromise(blockTag)) {
promises.push((async function() { request.blockTag = await blockTag; })());
} else {
request.blockTag = blockTag;
}
}
if (promises.length) {
return (async function() {
await Promise.all(promises);
return request;
})();
}
return request;
}
async getNetwork(): Promise<Network> {
// No explicit network was set and this is our first time
if (this.#networkPromise == null) {
// Detect the current network (shared with all calls)
const detectNetwork = (async () => {
try {
const network = await this._detectNetwork();
this.emit("network", network, null);
return network;
} catch (error) {
if (this.#networkPromise === detectNetwork!) {
this.#networkPromise = null;
}
throw error;
}
})();
this.#networkPromise = detectNetwork;
return (await detectNetwork).clone();
}
const networkPromise = this.#networkPromise;
const [ expected, actual ] = await Promise.all([
networkPromise, // Possibly an explicit Network
this._detectNetwork() // The actual connected network
]);
if (expected.chainId !== actual.chainId) {
if (this.#anyNetwork) {
// The "any" network can change, so notify listeners
this.emit("network", actual, expected);
// Update the network if something else hasn't already changed it
if (this.#networkPromise === networkPromise) {
this.#networkPromise = Promise.resolve(actual);
}
} else {
// Otherwise, we do not allow changes to the underlying network
assert(false, `network changed: ${ expected.chainId } => ${ actual.chainId } `, "NETWORK_ERROR", {
event: "changed"
});
}
}
return expected.clone();
}
async getFeeData(): Promise<FeeData> {
const network = await this.getNetwork();
const getFeeDataFunc = async () => {
const { _block, gasPrice, priorityFee } = await resolveProperties({
_block: this.#getBlock("latest", false),
gasPrice: ((async () => {
try {
const value = await this.#perform({ method: "getGasPrice" });
return getBigInt(value, "%response");
} catch (error) { }
return null
})()),
priorityFee: ((async () => {
try {
const value = await this.#perform({ method: "getPriorityFee" });
return getBigInt(value, "%response");
} catch (error) { }
return null;
})())
});
let maxFeePerGas: null | bigint = null;
let maxPriorityFeePerGas: null | bigint = null;
// These are the recommended EIP-1559 heuristics for fee data
const block = this._wrapBlock(_block, network);
if (block && block.baseFeePerGas) {
maxPriorityFeePerGas = (priorityFee != null) ? priorityFee: BigInt("1000000000");
maxFeePerGas = (block.baseFeePerGas * BN_2) + maxPriorityFeePerGas;
}
return new FeeData(gasPrice, maxFeePerGas, maxPriorityFeePerGas);
};
// Check for a FeeDataNetWorkPlugin
const plugin = <FetchUrlFeeDataNetworkPlugin>network.getPlugin("org.ethers.plugins.network.FetchUrlFeeDataPlugin");
if (plugin) {
const req = new FetchRequest(plugin.url);
const feeData = await plugin.processFunc(getFeeDataFunc, this, req);
return new FeeData(feeData.gasPrice, feeData.maxFeePerGas, feeData.maxPriorityFeePerGas);
}
return await getFeeDataFunc();
}
async estimateGas(_tx: TransactionRequest): Promise<bigint> {
let tx = this._getTransactionRequest(_tx);
if (isPromise(tx)) { tx = await tx; }
return getBigInt(await this.#perform({
method: "estimateGas", transaction: tx
}), "%response");
}
async #call(tx: PerformActionTransaction, blockTag: string, attempt: number): Promise<string> {
assert (attempt < MAX_CCIP_REDIRECTS, "CCIP read exceeded maximum redirections", "OFFCHAIN_FAULT", {
reason: "TOO_MANY_REDIRECTS",
transaction: Object.assign({ }, tx, { blockTag, enableCcipRead: true })
});
// This came in as a PerformActionTransaction, so to/from are safe; we can cast
const transaction = <PerformActionTransaction>copyRequest(tx);
try {
return hexlify(await this._perform({ method: "call", transaction, blockTag }));
} catch (error: any) {
// CCIP Read OffchainLookup
if (!this.disableCcipRead && isCallException(error) && error.data && attempt >= 0 && blockTag === "latest" && transaction.to != null && dataSlice(error.data, 0, 4) === "0x556f1830") {
const data = error.data;
const txSender = await resolveAddress(transaction.to, this);
// Parse the CCIP Read Arguments
let ccipArgs: CcipArgs;
try {
ccipArgs = parseOffchainLookup(dataSlice(error.data, 4));
} catch (error: any) {
assert(false, error.message, "OFFCHAIN_FAULT", {
reason: "BAD_DATA", transaction, info: { data } });
}
// Check the sender of the OffchainLookup matches the transaction
assert(ccipArgs.sender.toLowerCase() === txSender.toLowerCase(),
"CCIP Read sender mismatch", "CALL_EXCEPTION", {
action: "call",
data,
reason: "OffchainLookup",
transaction: <any>transaction, // @TODO: populate data?
invocation: null,
revert: {
signature: "OffchainLookup(address,string[],bytes,bytes4,bytes)",
name: "OffchainLookup",
args: ccipArgs.errorArgs
}
});
const ccipResult = await this.ccipReadFetch(transaction, ccipArgs.calldata, ccipArgs.urls);
assert(ccipResult != null, "CCIP Read failed to fetch data", "OFFCHAIN_FAULT", {
reason: "FETCH_FAILED", transaction, info: { data: error.data, errorArgs: ccipArgs.errorArgs } });
const tx = {
to: txSender,
data: concat([ ccipArgs.selector, encodeBytes([ ccipResult, ccipArgs.extraData ]) ])
};
this.emit("debug", { action: "sendCcipReadCall", transaction: tx });
try {
const result = await this.#call(tx, blockTag, attempt + 1);
this.emit("debug", { action: "receiveCcipReadCallResult", transaction: Object.assign({ }, tx), result });
return result;
} catch (error) {
this.emit("debug", { action: "receiveCcipReadCallError", transaction: Object.assign({ }, tx), error });
throw error;
}
}
throw error;
}
}
async #checkNetwork<T>(promise: Promise<T>): Promise<T> {
const { value } = await resolveProperties({
network: this.getNetwork(),
value: promise
});
return value;
}
async call(_tx: TransactionRequest): Promise<string> {
const { tx, blockTag } = await resolveProperties({
tx: this._getTransactionRequest(_tx),
blockTag: this._getBlockTag(_tx.blockTag)
});
return await this.#checkNetwork(this.#call(tx, blockTag, _tx.enableCcipRead ? 0: -1));
}
// Account
async #getAccountValue(request: _PerformAccountRequest, _address: AddressLike, _blockTag?: BlockTag): Promise<any> {
let address: string | Promise<string> = this._getAddress(_address);
let blockTag: string | Promise<string> = this._getBlockTag(_blockTag);
if (typeof(address) !== "string" || typeof(blockTag) !== "string") {
[ address, blockTag ] = await Promise.all([ address, blockTag ]);
}
return await this.#checkNetwork(this.#perform(Object.assign(request, { address, blockTag })));
}
async getBalance(address: AddressLike, blockTag?: BlockTag): Promise<bigint> {
return getBigInt(await this.#getAccountValue({ method: "getBalance" }, address, blockTag), "%response");
}
async getTransactionCount(address: AddressLike, blockTag?: BlockTag): Promise<number> {
return getNumber(await this.#getAccountValue({ method: "getTransactionCount" }, address, blockTag), "%response");
}
async getCode(address: AddressLike, blockTag?: BlockTag): Promise<string> {
return hexlify(await this.#getAccountValue({ method: "getCode" }, address, blockTag));
}
async getStorage(address: AddressLike, _position: BigNumberish, blockTag?: BlockTag): Promise<string> {
const position = getBigInt(_position, "position");
return hexlify(await this.#getAccountValue({ method: "getStorage", position }, address, blockTag));
}
// Write
async broadcastTransaction(signedTx: string): Promise<TransactionResponse> {
const { blockNumber, hash, network } = await resolveProperties({
blockNumber: this.getBlockNumber(),
hash: this._perform({
method: "broadcastTransaction",
signedTransaction: signedTx
}),
network: this.getNetwork()
});
const tx = Transaction.from(signedTx);
if (tx.hash !== hash) {
throw new Error("@TODO: the returned hash did not match");
}
return this._wrapTransactionResponse(<any>tx, network).replaceableTransaction(blockNumber);
}
async #getBlock(block: BlockTag | string, includeTransactions: boolean): Promise<any> {
// @TODO: Add CustomBlockPlugin check
if (isHexString(block, 32)) {
return await this.#perform({
method: "getBlock", blockHash: block, includeTransactions
});
}
let blockTag = this._getBlockTag(block);
if (typeof(blockTag) !== "string") { blockTag = await blockTag; }
return await this.#perform({
method: "getBlock", blockTag, includeTransactions
});
}
// Queries
async getBlock(block: BlockTag | string, prefetchTxs?: boolean): Promise<null | Block> {
const { network, params } = await resolveProperties({
network: this.getNetwork(),
params: this.#getBlock(block, !!prefetchTxs)
});
if (params == null) { return null; }
return this._wrapBlock(params, network);
}
async getTransaction(hash: string): Promise<null | TransactionResponse> {
const { network, params } = await resolveProperties({
network: this.getNetwork(),
params: this.#perform({ method: "getTransaction", hash })
});
if (params == null) { return null; }
return this._wrapTransactionResponse(params, network);
}
async getTransactionReceipt(hash: string): Promise<null | TransactionReceipt> {
const { network, params } = await resolveProperties({
network: this.getNetwork(),
params: this.#perform({ method: "getTransactionReceipt", hash })
});
if (params == null) { return null; }
// Some backends did not backfill the effectiveGasPrice into old transactions
// in the receipt, so we look it up manually and inject it.
if (params.gasPrice == null && params.effectiveGasPrice == null) {
const tx = await this.#perform({ method: "getTransaction", hash });
if (tx == null) { throw new Error("report this; could not find tx or effectiveGasPrice"); }
params.effectiveGasPrice = tx.gasPrice;
}
return this._wrapTransactionReceipt(params, network);
}
async getTransactionResult(hash: string): Promise<null | string> {
const { result } = await resolveProperties({
network: this.getNetwork(),
result: this.#perform({ method: "getTransactionResult", hash })
});
if (result == null) { return null; }
return hexlify(result);
}
// Bloom-filter Queries
async getLogs(_filter: Filter | FilterByBlockHash): Promise<Array<Log>> {
let filter = this._getFilter(_filter);
if (isPromise(filter)) { filter = await filter; }
const { network, params } = await resolveProperties({
network: this.getNetwork(),
params: this.#perform<Array<LogParams>>({ method: "getLogs", filter })
});
return params.map((p) => this._wrapLog(p, network));
}
// ENS
_getProvider(chainId: number): AbstractProvider {
assert(false, "provider cannot connect to target network", "UNSUPPORTED_OPERATION", {
operation: "_getProvider()"
});
}
async getResolver(name: string): Promise<null | EnsResolver> {
return await EnsResolver.fromName(this, name);
}
async getAvatar(name: string): Promise<null | string> {
const resolver = await this.getResolver(name);
if (resolver) { return await resolver.getAvatar(); }
return null;
}
async resolveName(name: string): Promise<null | string>{
const resolver = await this.getResolver(name);
if (resolver) { return await resolver.getAddress(); }
return null;
}
async lookupAddress(address: string): Promise<null | string> {
address = getAddress(address);
const node = namehash(address.substring(2).toLowerCase() + ".addr.reverse");
try {
const ensAddr = await EnsResolver.getEnsAddress(this);
const ensContract = new Contract(ensAddr, [
"function resolver(bytes32) view returns (address)"
], this);
const resolver = await ensContract.resolver(node);
if (resolver == null || resolver === ZeroAddress) { return null; }
const resolverContract = new Contract(resolver, [
"function name(bytes32) view returns (string)"
], this);
const name = await resolverContract.name(node);
// Failed forward resolution
const check = await this.resolveName(name);
if (check !== address) { return null; }
return name;
} catch (error) {
// No data was returned from the resolver
if (isError(error, "BAD_DATA") && error.value === "0x") {
return null;
}
// Something reerted
if (isError(error, "CALL_EXCEPTION")) { return null; }
throw error;
}
return null;
}
async waitForTransaction(hash: string, _confirms?: null | number, timeout?: null | number): Promise<null | TransactionReceipt> {
const confirms = (_confirms != null) ? _confirms: 1;
if (confirms === 0) { return this.getTransactionReceipt(hash); }
return new Promise(async (resolve, reject) => {
let timer: null | Timer = null;
const listener = (async (blockNumber: number) => {
try {
const receipt = await this.getTransactionReceipt(hash);
if (receipt != null) {
if (blockNumber - receipt.blockNumber + 1 >= confirms) {
resolve(receipt);
//this.off("block", listener);
if (timer) {
clearTimeout(timer);
timer = null;
}
return;
}
}
} catch (error) {
console.log("EEE", error);
}
this.once("block", listener);
});
if (timeout != null) {
timer = setTimeout(() => {
if (timer == null) { return; }
timer = null;
this.off("block", listener);
reject(makeError("timeout", "TIMEOUT", { reason: "timeout" }));
}, timeout);
}
listener(await this.getBlockNumber());
});
}
async waitForBlock(blockTag?: BlockTag): Promise<Block> {
assert(false, "not implemented yet", "NOT_IMPLEMENTED", {
operation: "waitForBlock"
});
}
/**
* Clear a timer created using the [[_setTimeout]] method.
*/
_clearTimeout(timerId: number): void {
const timer = this.#timers.get(timerId);
if (!timer) { return; }
if (timer.timer) { clearTimeout(timer.timer); }
this.#timers.delete(timerId);
}
/**
* Create a timer that will execute %%func%% after at least %%timeout%%
* (in ms). If %%timeout%% is unspecified, then %%func%% will execute
* in the next event loop.
*
* [Pausing](AbstractProvider-paused) the provider will pause any
* associated timers.
*/
_setTimeout(_func: () => void, timeout?: number): number {
if (timeout == null) { timeout = 0; }
const timerId = this.#nextTimer++;
const func = () => {
this.#timers.delete(timerId);
_func();
};
if (this.paused) {
this.#timers.set(timerId, { timer: null, func, time: timeout });
} else {
const timer = setTimeout(func, timeout);
this.#timers.set(timerId, { timer, func, time: getTime() });
}
return timerId;
}
/**
* Perform %%func%% on each subscriber.
*/
_forEachSubscriber(func: (s: Subscriber) => void): void {
for (const sub of this.#subs.values()) {
func(sub.subscriber);
}
}
/**
* Sub-classes may override this to customize subscription
* implementations.
*/
_getSubscriber(sub: Subscription): Subscriber {
switch (sub.type) {
case "debug":
case "error":
case "network":
return new UnmanagedSubscriber(sub.type);
case "block": {
const subscriber = new PollingBlockSubscriber(this);
subscriber.pollingInterval = this.pollingInterval;
return subscriber;
}
case "safe": case "finalized":
return new PollingBlockTagSubscriber(this, sub.type);
case "event":
return new PollingEventSubscriber(this, sub.filter);
case "transaction":
return new PollingTransactionSubscriber(this, sub.hash);
case "orphan":
return new PollingOrphanSubscriber(this, sub.filter);
}
throw new Error(`unsupported event: ${ sub.type }`);
}
/**
* If a [[Subscriber]] fails and needs to replace itself, this
* method may be used.
*
* For example, this is used for providers when using the
* ``eth_getFilterChanges`` method, which can return null if state
* filters are not supported by the backend, allowing the Subscriber
* to swap in a [[PollingEventSubscriber]].
*/
_recoverSubscriber(oldSub: Subscriber, newSub: Subscriber): void {
for (const sub of this.#subs.values()) {
if (sub.subscriber === oldSub) {
if (sub.started) { sub.subscriber.stop(); }
sub.subscriber = newSub;
if (sub.started) { newSub.start(); }
if (this.#pausedState != null) { newSub.pause(this.#pausedState); }
break;
}
}
}
async #hasSub(event: ProviderEvent, emitArgs?: Array<any>): Promise<null | Sub> {
let sub = await getSubscription(event, this);
// This is a log that is removing an existing log; we actually want
// to emit an orphan event for the removed log
if (sub.type === "event" && emitArgs && emitArgs.length > 0 && emitArgs[0].removed === true) {
sub = await getSubscription({ orphan: "drop-log", log: emitArgs[0] }, this);
}
return this.#subs.get(sub.tag) || null;
}
async #getSub(event: ProviderEvent): Promise<Sub> {
const subscription = await getSubscription(event, this);
// Prevent tampering with our tag in any subclass' _getSubscriber
const tag = subscription.tag;
let sub = this.#subs.get(tag);
if (!sub) {
const subscriber = this._getSubscriber(subscription);
const addressableMap = new WeakMap();
const nameMap = new Map();
sub = { subscriber, tag, addressableMap, nameMap, started: false, listeners: [ ] };
this.#subs.set(tag, sub);
}
return sub;
}
async on(event: ProviderEvent, listener: Listener): Promise<this> {
const sub = await this.#getSub(event);
sub.listeners.push({ listener, once: false });
if (!sub.started) {
sub.subscriber.start();
sub.started = true;
if (this.#pausedState != null) { sub.subscriber.pause(this.#pausedState); }
}
return this;
}
async once(event: ProviderEvent, listener: Listener): Promise<this> {
const sub = await this.#getSub(event);
sub.listeners.push({ listener, once: true });
if (!sub.started) {
sub.subscriber.start();
sub.started = true;
if (this.#pausedState != null) { sub.subscriber.pause(this.#pausedState); }
}
return this;
}
async emit(event: ProviderEvent, ...args: Array<any>): Promise<boolean> {
const sub = await this.#hasSub(event, args);
// If there is not subscription or if a recent emit removed
// the last of them (which also deleted the sub) do nothing
if (!sub || sub.listeners.length === 0) { return false; };
const count = sub.listeners.length;
sub.listeners = sub.listeners.filter(({ listener, once }) => {
const payload = new EventPayload(this, (once ? null: listener), event);
try {
listener.call(this, ...args, payload);
} catch(error) { }
return !once;
});
if (sub.listeners.length === 0) {
if (sub.started) { sub.subscriber.stop(); }
this.#subs.delete(sub.tag);
}
return (count > 0);
}
async listenerCount(event?: ProviderEvent): Promise<number> {
if (event) {
const sub = await this.#hasSub(event);
if (!sub) { return 0; }
return sub.listeners.length;
}
let total = 0;
for (const { listeners } of this.#subs.values()) {
total += listeners.length;
}
return total;
}
async listeners(event?: ProviderEvent): Promise<Array<Listener>> {
if (event) {
const sub = await this.#hasSub(event);
if (!sub) { return [ ]; }
return sub.listeners.map(({ listener }) => listener);
}
let result: Array<Listener> = [ ];
for (const { listeners } of this.#subs.values()) {
result = result.concat(listeners.map(({ listener }) => listener));
}
return result;
}
async off(event: ProviderEvent, listener?: Listener): Promise<this> {
const sub = await this.#hasSub(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 || sub.listeners.length === 0) {
if (sub.started) { sub.subscriber.stop(); }
this.#subs.delete(sub.tag);
}
return this;
}
async removeAllListeners(event?: ProviderEvent): Promise<this> {
if (event) {
const { tag, started, subscriber } = await this.#getSub(event);
if (started) { subscriber.stop(); }
this.#subs.delete(tag);
} else {
for (const [ tag, { started, subscriber } ] of this.#subs) {
if (started) { subscriber.stop(); }
this.#subs.delete(tag);
}
}
return this;
}
// Alias for "on"
async addListener(event: ProviderEvent, listener: Listener): Promise<this> {
return await this.on(event, listener);
}
// Alias for "off"
async removeListener(event: ProviderEvent, listener: Listener): Promise<this> {
return this.off(event, listener);
}
/**
* If this provider has been destroyed using the [[destroy]] method.
*
* Once destroyed, all resources are reclaimed, internal event loops
* and timers are cleaned up and no further requests may be sent to
* the provider.
*/
get destroyed(): boolean {
return this.#destroyed;
}
/**
* Sub-classes may use this to shutdown any sockets or release their
* resources and reject any pending requests.
*
* Sub-classes **must** call ``super.destroy()``.
*/
destroy(): void {
// Stop all listeners
this.removeAllListeners();
// Shut down all tiemrs
for (const timerId of this.#timers.keys()) {
this._clearTimeout(timerId);
}
this.#destroyed = true;
}
/**
* Whether the provider is currently paused.
*
* A paused provider will not emit any events, and generally should
* not make any requests to the network, but that is up to sub-classes
* to manage.
*
* Setting ``paused = true`` is identical to calling ``.pause(false)``,
* which will buffer any events that occur while paused until the
* provider is unpaused.
*/
get paused(): boolean { return (this.#pausedState != null); }
set paused(pause: boolean) {
if (!!pause === this.paused) { return; }
if (this.paused) {
this.resume();
} else {
this.pause(false);
}
}
/**
* Pause the provider. If %%dropWhilePaused%%, any events that occur
* while paused are dropped, otherwise all events will be emitted once
* the provider is unpaused.
*/
pause(dropWhilePaused?: boolean): void {
this.#lastBlockNumber = -1;
if (this.#pausedState != null) {
if (this.#pausedState == !!dropWhilePaused) { return; }
assert(false, "cannot change pause type; resume first", "UNSUPPORTED_OPERATION", {
operation: "pause"
});
}
this._forEachSubscriber((s) => s.pause(dropWhilePaused));
this.#pausedState = !!dropWhilePaused;
for (const timer of this.#timers.values()) {
// Clear the timer
if (timer.timer) { clearTimeout(timer.timer); }
// Remaining time needed for when we become unpaused
timer.time = getTime() - timer.time;
}
}
/**
* Resume the provider.
*/
resume(): void {
if (this.#pausedState == null) { return; }
this._forEachSubscriber((s) => s.resume());
this.#pausedState = null;
for (const timer of this.#timers.values()) {
// Remaining time when we were paused
let timeout = timer.time;
if (timeout < 0) { timeout = 0; }
// Start time (in cause paused, so we con compute remaininf time)
timer.time = getTime();
// Start the timer
setTimeout(timer.func, timeout);
}
}
}
function _parseString(result: string, start: number): null | string {
try {
const bytes = _parseBytes(result, start);
if (bytes) { return toUtf8String(bytes); }
} catch(error) { }
return null;
}
function _parseBytes(result: string, start: number): null | string {
if (result === "0x") { return null; }
try {
const offset = getNumber(dataSlice(result, start, start + 32));
const length = getNumber(dataSlice(result, offset, offset + 32));
return dataSlice(result, offset + 32, offset + 32 + length);
} catch (error) { }
return null;
}
function numPad(value: number): Uint8Array {
const result = toBeArray(value);
if (result.length > 32) { throw new Error("internal; should not happen"); }
const padded = new Uint8Array(32);
padded.set(result, 32 - result.length);
return padded;
}
function bytesPad(value: Uint8Array): Uint8Array {
if ((value.length % 32) === 0) { return value; }
const result = new Uint8Array(Math.ceil(value.length / 32) * 32);
result.set(value);
return result;
}
const empty: Uint8Array = new Uint8Array([ ]);
// ABI Encodes a series of (bytes, bytes, ...)
function encodeBytes(datas: Array<BytesLike>): string {
const result: Array<Uint8Array> = [ ];
let byteCount = 0;
// Add place-holders for pointers as we add items
for (let i = 0; i < datas.length; i++) {
result.push(empty);
byteCount += 32;
}
for (let i = 0; i < datas.length; i++) {
const data = getBytes(datas[i]);
// Update the bytes offset
result[i] = numPad(byteCount);
// The length and padded value of data
result.push(numPad(data.length));
result.push(bytesPad(data));
byteCount += 32 + Math.ceil(data.length / 32) * 32;
}
return concat(result);
}
const zeros = "0x0000000000000000000000000000000000000000000000000000000000000000"
function parseOffchainLookup(data: string): CcipArgs {
const result: CcipArgs = {
sender: "", urls: [ ], calldata: "", selector: "", extraData: "", errorArgs: [ ]
};
assert(dataLength(data) >= 5 * 32, "insufficient OffchainLookup data", "OFFCHAIN_FAULT", {
reason: "insufficient OffchainLookup data"
});
const sender = dataSlice(data, 0, 32);
assert(dataSlice(sender, 0, 12) === dataSlice(zeros, 0, 12), "corrupt OffchainLookup sender", "OFFCHAIN_FAULT", {
reason: "corrupt OffchainLookup sender"
});
result.sender = dataSlice(sender, 12);
// Read the URLs from the response
try {
const urls: Array<string> = [];
const urlsOffset = getNumber(dataSlice(data, 32, 64));
const urlsLength = getNumber(dataSlice(data, urlsOffset, urlsOffset + 32));
const urlsData = dataSlice(data, urlsOffset + 32);
for (let u = 0; u < urlsLength; u++) {
const url = _parseString(urlsData, u * 32);
if (url == null) { throw new Error("abort"); }
urls.push(url);
}
result.urls = urls;
} catch (error) {
assert(false, "corrupt OffchainLookup urls", "OFFCHAIN_FAULT", {
reason: "corrupt OffchainLookup urls"
});
}
// Get the CCIP calldata to forward
try {
const calldata = _parseBytes(data, 64);
if (calldata == null) { throw new Error("abort"); }
result.calldata = calldata;
} catch (error) {
assert(false, "corrupt OffchainLookup calldata", "OFFCHAIN_FAULT", {
reason: "corrupt OffchainLookup calldata"
});
}
// Get the callbackSelector (bytes4)
assert(dataSlice(data, 100, 128) === dataSlice(zeros, 0, 28), "corrupt OffchainLookup callbaackSelector", "OFFCHAIN_FAULT", {
reason: "corrupt OffchainLookup callbaackSelector"
});
result.selector = dataSlice(data, 96, 100);
// Get the extra data to send back to the contract as context
try {
const extraData = _parseBytes(data, 128);
if (extraData == null) { throw new Error("abort"); }
result.extraData = extraData;
} catch (error) {
assert(false, "corrupt OffchainLookup extraData", "OFFCHAIN_FAULT", {
reason: "corrupt OffchainLookup extraData"
});
}
result.errorArgs = "sender,urls,calldata,selector,extraData".split(/,/).map((k) => (<any>result)[k])
return result;
}
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