55 lines
1.8 KiB
TypeScript
55 lines
1.8 KiB
TypeScript
import { assertArgument, throwError } 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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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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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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if (typeof(target) === "string") {
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return throwError("unconfigured name", "UNCONFIGURED_NAME", { value: target });
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}
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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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// Resolves an Ethereum address, ENS name or Addressable object,
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// throwing if the result is null.
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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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if (resolver == null) {
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return throwError("ENS resolution requires a provider", "UNSUPPORTED_OPERATION", {
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operation: "resolveName",
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});
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}
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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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