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import type { HexString } from 'https://deno.land/x/polkadot@0.2.40/util/types.ts';import type { KeyringPair, KeyringPairs } from './types.ts';
import { isHex, isU8a, u8aToHex, u8aToU8a } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';import { decodeAddress } from 'https://deno.land/x/polkadot@0.2.40/util-crypto/mod.ts';
type KeyringPairMap = Record<string, KeyringPair>;
export class Pairs implements KeyringPairs {  readonly #map: KeyringPairMap = {};
  public add (pair: KeyringPair): KeyringPair {    this.#map[decodeAddress(pair.address).toString()] = pair;
    return pair;  }
  public all (): KeyringPair[] {    return Object.values(this.#map);  }
  public get (address: HexString | string | Uint8Array): KeyringPair {    const pair = this.#map[decodeAddress(address).toString()];
    if (!pair) {      throw new Error(`Unable to retrieve keypair '${        isU8a(address) || isHex(address)          ? u8aToHex(u8aToU8a(address))          : address      }'`);    }
    return pair;  }
  public remove (address: HexString | string | Uint8Array): void {    delete this.#map[decodeAddress(address).toString()];  }}