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* A **Network** encapsulates the various properties required to
* interact with a specific chain.
*
* @_subsection: api/providers:Networks [networks]
*/
import { accessListify } from "../transaction/index.js";
import { getBigInt, assert, assertArgument } from "../utils/index.js";
import {
EnsPlugin, FetchUrlFeeDataNetworkPlugin, GasCostPlugin
} from "./plugins-network.js";
import type { BigNumberish } from "../utils/index.js";
import type { TransactionLike } from "../transaction/index.js";
import type { NetworkPlugin } from "./plugins-network.js";
/**
* A Networkish can be used to allude to a Network, by specifing:
* - a [[Network]] object
* - a well-known (or registered) network name
* - a well-known (or registered) chain ID
* - an object with sufficient details to describe a network
*/
export type Networkish = Network | number | bigint | string | {
name?: string,
chainId?: number,
//layerOneConnection?: Provider,
ensAddress?: string,
ensNetwork?: number
};
/* * * *
// Networks which operation against an L2 can use this plugin to
// specify how to access L1, for the purpose of resolving ENS,
// for example.
export class LayerOneConnectionPlugin extends NetworkPlugin {
readonly provider!: Provider;
// @TODO: Rename to ChainAccess and allow for connecting to any chain
constructor(provider: Provider) {
super("org.ethers.plugins.layer-one-connection");
defineProperties<LayerOneConnectionPlugin>(this, { provider });
}
clone(): LayerOneConnectionPlugin {
return new LayerOneConnectionPlugin(this.provider);
}
}
*/
const Networks: Map<string | bigint, () => Network> = new Map();
/**
* A **Network** provides access to a chain's properties and allows
* for plug-ins to extend functionality.
*/
export class Network {
#name: string;
#chainId: bigint;
#plugins: Map<string, NetworkPlugin>;
/**
* Creates a new **Network** for %%name%% and %%chainId%%.
*/
constructor(name: string, chainId: BigNumberish) {
this.#name = name;
this.#chainId = getBigInt(chainId);
this.#plugins = new Map();
}
/**
* Returns a JSON-compatible representation of a Network.
*/
toJSON(): any {
return { name: this.name, chainId: String(this.chainId) };
}
/**
* The network common name.
*
* This is the canonical name, as networks migh have multiple
* names.
*/
get name(): string { return this.#name; }
set name(value: string) { this.#name = value; }
/**
* The network chain ID.
*/
get chainId(): bigint { return this.#chainId; }
set chainId(value: BigNumberish) { this.#chainId = getBigInt(value, "chainId"); }
/**
* Returns true if %%other%% matches this network. Any chain ID
* must match, and if no chain ID is present, the name must match.
*
* This method does not currently check for additional properties,
* such as ENS address or plug-in compatibility.
*/
matches(other: Networkish): boolean {
if (other == null) { return false; }
if (typeof(other) === "string") {
try {
return (this.chainId === getBigInt(other));
} catch (error) { }
return (this.name === other);
}
if (typeof(other) === "number" || typeof(other) === "bigint") {
try {
return (this.chainId === getBigInt(other));
} catch (error) { }
return false;
}
if (typeof(other) === "object") {
if (other.chainId != null) {
try {
return (this.chainId === getBigInt(other.chainId));
} catch (error) { }
return false;
}
if (other.name != null) {
return (this.name === other.name);
}
return false;
}
return false;
}
/**
* Returns the list of plugins currently attached to this Network.
*/
get plugins(): Array<NetworkPlugin> {
return Array.from(this.#plugins.values());
}
/**
* Attach a new %%plugin%% to this Network. The network name
* must be unique, excluding any fragment.
*/
attachPlugin(plugin: NetworkPlugin): this {
if (this.#plugins.get(plugin.name)) {
throw new Error(`cannot replace existing plugin: ${ plugin.name } `);
}
this.#plugins.set(plugin.name, plugin.clone());
return this;
}
/**
* Return the plugin, if any, matching %%name%% exactly. Plugins
* with fragments will not be returned unless %%name%% includes
* a fragment.
*/
getPlugin<T extends NetworkPlugin = NetworkPlugin>(name: string): null | T {
return <T>(this.#plugins.get(name)) || null;
}
/**
* Gets a list of all plugins that match %%name%%, with otr without
* a fragment.
*/
getPlugins<T extends NetworkPlugin = NetworkPlugin>(basename: string): Array<T> {
return <Array<T>>(this.plugins.filter((p) => (p.name.split("#")[0] === basename)));
}
/**
* Create a copy of this Network.
*/
clone(): Network {
const clone = new Network(this.name, this.chainId);
this.plugins.forEach((plugin) => {
clone.attachPlugin(plugin.clone());
});
return clone;
}
/**
* Compute the intrinsic gas required for a transaction.
*
* A GasCostPlugin can be attached to override the default
* values.
*/
computeIntrinsicGas(tx: TransactionLike): number {
const costs = this.getPlugin<GasCostPlugin>("org.ethers.plugins.network.GasCost") || (new GasCostPlugin());
let gas = costs.txBase;
if (tx.to == null) { gas += costs.txCreate; }
if (tx.data) {
for (let i = 2; i < tx.data.length; i += 2) {
if (tx.data.substring(i, i + 2) === "00") {
gas += costs.txDataZero;
} else {
gas += costs.txDataNonzero;
}
}
}
if (tx.accessList) {
const accessList = accessListify(tx.accessList);
for (const addr in accessList) {
gas += costs.txAccessListAddress + costs.txAccessListStorageKey * accessList[addr].storageKeys.length;
}
}
return gas;
}
/**
* Returns a new Network for the %%network%% name or chainId.
*/
static from(network?: Networkish): Network {
injectCommonNetworks();
// Default network
if (network == null) { return Network.from("mainnet"); }
// Canonical name or chain ID
if (typeof(network) === "number") { network = BigInt(network); }
if (typeof(network) === "string" || typeof(network) === "bigint") {
const networkFunc = Networks.get(network);
if (networkFunc) { return networkFunc(); }
if (typeof(network) === "bigint") {
return new Network("unknown", network);
}
assertArgument(false, "unknown network", "network", network);
}
// Clonable with network-like abilities
if (typeof((<Network>network).clone) === "function") {
const clone = (<Network>network).clone();
//if (typeof(network.name) !== "string" || typeof(network.chainId) !== "number") {
//}
return clone;
}
// Networkish
if (typeof(network) === "object") {
assertArgument(typeof(network.name) === "string" && typeof(network.chainId) === "number",
"invalid network object name or chainId", "network", network);
const custom = new Network(<string>(network.name), <number>(network.chainId));
if ((<any>network).ensAddress || (<any>network).ensNetwork != null) {
custom.attachPlugin(new EnsPlugin((<any>network).ensAddress, (<any>network).ensNetwork));
}
//if ((<any>network).layerOneConnection) {
// custom.attachPlugin(new LayerOneConnectionPlugin((<any>network).layerOneConnection));
//}
return custom;
}
assertArgument(false, "invalid network", "network", network);
}
/**
* Register %%nameOrChainId%% with a function which returns
* an instance of a Network representing that chain.
*/
static register(nameOrChainId: string | number | bigint, networkFunc: () => Network): void {
if (typeof(nameOrChainId) === "number") { nameOrChainId = BigInt(nameOrChainId); }
const existing = Networks.get(nameOrChainId);
if (existing) {
assertArgument(false, `conflicting network for ${ JSON.stringify(existing.name) }`, "nameOrChainId", nameOrChainId);
}
Networks.set(nameOrChainId, networkFunc);
}
}
type Options = {
ensNetwork?: number;
altNames?: Array<string>;
plugins?: Array<NetworkPlugin>;
};
// We don't want to bring in formatUnits because it is backed by
// FixedNumber and we want to keep Networks tiny. The values
// included by the Gas Stations are also IEEE 754 with lots of
// rounding issues and exceed the strict checks formatUnits has.
function parseUnits(_value: number | string, decimals: number): bigint {
const value = String(_value);
if (!value.match(/^[0-9.]+$/)) {
throw new Error(`invalid gwei value: ${ _value }`);
}
// Break into [ whole, fraction ]
const comps = value.split(".");
if (comps.length === 1) { comps.push(""); }
// More than 1 decimal point or too many fractional positions
if (comps.length !== 2) {
throw new Error(`invalid gwei value: ${ _value }`);
}
// Pad the fraction to 9 decimalplaces
while (comps[1].length < decimals) { comps[1] += "0"; }
// Too many decimals and some non-zero ending, take the ceiling
if (comps[1].length > 9) {
let frac = BigInt(comps[1].substring(0, 9));
if (!comps[1].substring(9).match(/^0+$/)) { frac++; }
comps[1] = frac.toString();
}
return BigInt(comps[0] + comps[1]);
}
// Used by Polygon to use a gas station for fee data
function getGasStationPlugin(url: string) {
return new FetchUrlFeeDataNetworkPlugin(url, async (fetchFeeData, provider, request) => {
// Prevent Cloudflare from blocking our request in node.js
request.setHeader("User-Agent", "ethers");
let response;
try {
const [ _response, _feeData ] = await Promise.all([
request.send(), fetchFeeData()
]);
response = _response;
const payload = response.bodyJson.standard;
const feeData = {
gasPrice: _feeData.gasPrice,
maxFeePerGas: parseUnits(payload.maxFee, 9),
maxPriorityFeePerGas: parseUnits(payload.maxPriorityFee, 9),
};
return feeData;
} catch (error: any) {
assert(false, `error encountered with polygon gas station (${ JSON.stringify(request.url) })`, "SERVER_ERROR", { request, response, error });
}
});
}
// See: https://chainlist.org
let injected = false;
function injectCommonNetworks(): void {
if (injected) { return; }
injected = true;
/// Register popular Ethereum networks
function registerEth(name: string, chainId: number, options: Options): void {
const func = function() {
const network = new Network(name, chainId);
// We use 0 to disable ENS
if (options.ensNetwork != null) {
network.attachPlugin(new EnsPlugin(null, options.ensNetwork));
}
network.attachPlugin(new GasCostPlugin());
(options.plugins || []).forEach((plugin) => {
network.attachPlugin(plugin);
});
return network;
};
// Register the network by name and chain ID
Network.register(name, func);
Network.register(chainId, func);
if (options.altNames) {
options.altNames.forEach((name) => {
Network.register(name, func);
});
}
}
registerEth("mainnet", 1, { ensNetwork: 1, altNames: [ "homestead" ] });
registerEth("ropsten", 3, { ensNetwork: 3 });
registerEth("rinkeby", 4, { ensNetwork: 4 });
registerEth("goerli", 5, { ensNetwork: 5 });
registerEth("kovan", 42, { ensNetwork: 42 });
registerEth("sepolia", 11155111, { ensNetwork: 11155111 });
registerEth("holesky", 17000, { ensNetwork: 17000 });
registerEth("classic", 61, { });
registerEth("classicKotti", 6, { });
registerEth("arbitrum", 42161, {
ensNetwork: 1,
});
registerEth("arbitrum-goerli", 421613, { });
registerEth("arbitrum-sepolia", 421614, { });
registerEth("base", 8453, { ensNetwork: 1 });
registerEth("base-goerli", 84531, { });
registerEth("base-sepolia", 84532, { });
registerEth("bnb", 56, { ensNetwork: 1 });
registerEth("bnbt", 97, { });
registerEth("linea", 59144, { ensNetwork: 1 });
registerEth("linea-goerli", 59140, { });
registerEth("linea-sepolia", 59141, { });
registerEth("matic", 137, {
ensNetwork: 1,
plugins: [
getGasStationPlugin("https:/\/gasstation.polygon.technology/v2")
]
});
registerEth("matic-amoy", 80002, { });
registerEth("matic-mumbai", 80001, {
altNames: [ "maticMumbai", "maticmum" ], // @TODO: Future remove these alts
plugins: [
getGasStationPlugin("https:/\/gasstation-testnet.polygon.technology/v2")
]
});
registerEth("optimism", 10, {
ensNetwork: 1,
plugins: [ ]
});
registerEth("optimism-goerli", 420, { });
registerEth("optimism-sepolia", 11155420, { });
registerEth("xdai", 100, { ensNetwork: 1 });
}
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