import Web3 from 'web3';
import { Web3Service } from '@app/_services/web3.service';

const abi: Array<any> = require('@src/assets/js/block-sync/data/TokenUniqueSymbolIndex.json');
const web3: Web3 = Web3Service.getInstance();

export class TokenRegistry {
  contractAddress: string;
  signerAddress: string;
  contract: any;

  constructor(contractAddress: string, signerAddress?: string) {
    this.contractAddress = contractAddress;
    this.contract = new web3.eth.Contract(abi, this.contractAddress);
    if (signerAddress) {
      this.signerAddress = signerAddress;
    } else {
      this.signerAddress = web3.eth.accounts[0];
    }
  }

  public async totalTokens(): Promise<number> {
    return await this.contract.methods.entryCount().call();
  }

  public async entry(serial: number): Promise<string> {
    return await this.contract.methods.entry(serial).call();
  }

  public async addressOf(identifier: string): Promise<string> {
    const id: string = web3.eth.abi.encodeParameter('bytes32', web3.utils.toHex(identifier));
    return await this.contract.methods.addressOf(id).call();
  }
}