call.js

api.post('/:token_id/call', async (req, res, next) => {
    const query = await Token.findOne({
      token_id: req.params.token_id,
    }).exec();
    if(_.isNull(query))
    return res.status(500).json({
      code: 1,
      message: 'The token id does not exist.'
    });

    const abiPath = path.join(__dirname, '..', '..', 'contracts', 'HanwhaToken.json');
    const abi = JSON.parse(fs.readFileSync(abiPath).toString()).abi;

    const contract = new web3.eth.Contract(abi, query.token_address);
    let params = {};
    if (!_.isUndefined(req.body.params)) params = Object.values(req.body.params);
    const result = await contract.methods[req.body.method](...params).call();

    return res.status(200).json({
      code: 0,
      message: 'success',
      response: result,
    });
  });