63 lines
2.1 KiB
TypeScript
63 lines
2.1 KiB
TypeScript
import { assert, assertArgument } from "../utils/index.js";
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import { getAddress } from "./address.js";
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import type { Addressable, AddressLike, NameResolver } from "./index.js";
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/**
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* Returns true if %%value%% is an object which implements the
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* [[Addressable]] interface.
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*/
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export function isAddressable(value: any): value is Addressable {
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return (value && typeof(value.getAddress) === "function");
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}
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/**
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* Returns true if %%value%% is a valid address.
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*/
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export function isAddress(value: any): boolean {
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try {
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getAddress(value);
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return true;
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} catch (error) { }
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return false;
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}
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async function checkAddress(target: any, promise: Promise<null | string>): Promise<string> {
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const result = await promise;
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if (result == null || result === "0x0000000000000000000000000000000000000000") {
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assert(typeof(target) !== "string", "unconfigured name", "UNCONFIGURED_NAME", { value: target });
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assertArgument(false, "invalid AddressLike value; did not resolve to a value address", "target", target);
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}
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return getAddress(result);
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}
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/**
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* Resolves to an address for the %%target%%, which may be any
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* supported address type, an [[Addressable]] or a Promise which
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* resolves to an address.
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*
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* If an ENS name is provided, but that name has not been correctly
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* configured a [[UnconfiguredNameError]] is thrown.
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*/
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export function resolveAddress(target: AddressLike, resolver?: null | NameResolver): string | Promise<string> {
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if (typeof(target) === "string") {
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if (target.match(/^0x[0-9a-f]{40}$/i)) { return getAddress(target); }
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assert(resolver != null, "ENS resolution requires a provider",
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"UNSUPPORTED_OPERATION", { operation: "resolveName" });
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return checkAddress(target, resolver.resolveName(target));
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} else if (isAddressable(target)) {
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return checkAddress(target, target.getAddress());
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} else if (typeof(target.then) === "function") {
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return checkAddress(target, target);
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}
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assertArgument(false, "unsupported addressable value", "target", target);
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}
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