@colony/colony-js-client/lib/TokenClient/callers/GetTokenInfo.js.flow

Reference implementation of the Colony API

/* @flow */
/* eslint-disable no-underscore-dangle */

import ContractClient from '@colony/colony-js-contract-client';

import type TokenClient from '../index';

type InputValues = {};
type CallResult = [?string, ?string, ?number];

export default class GetTokenInfo extends ContractClient.Caller<
  InputValues,
  *,
  TokenClient,
  *,
> {
  constructor(params: *) {
    super({
      functionName: 'getTokenInfo',
      input: [],
      output: [
        ['name', 'string'],
        ['symbol', 'string'],
        ['decimals', 'number'],
      ],
      ...params,
    });
  }

  async call() {
    const name = await this.getValueFor('name');
    const symbol = await this.getValueFor('symbol');
    const decimals = await this.getValueFor('decimals');

    const callResult: CallResult = [name, symbol, decimals];

    return this.convertOutputValues(callResult);
  }

  async getValueFor(prop: string) {
    let data;
    try {
      data = await this.client.call(prop, []);
    } catch (e) {
      data = null;
    }
    return data;
  }
}