Simulate multisig txs on any chain with Terra.js

main.ts

import { LCDClient, MsgExecuteContract } from "@terra-money/terra.js";

const LCD_URL = "[LCD-ENDPOINT-HERE]";
const CHAIN_ID = "neutron-1";
const DEFAULT_GAS_PRICE = "0.02uatom";
const DEFAULT_GAS_MULTIPLIER = 1.3;

(async function () {
  const multisig = "[MS-ADDRESS-HERE]";
  console.log("Neutron: Simulating tx with address", multisig);

  const lcd = new LCDClient({
    URL: LCD_URL,
    chainID: CHAIN_ID,
    gasPrices: DEFAULT_GAS_PRICE,
    gasAdjustment: DEFAULT_GAS_MULTIPLIER,
  });

  const account = await lcd.auth.accountInfo(multisig);

  try {
    const simulate = await lcd.tx.estimateFee(
      [
        {
          sequenceNumber: account.getSequenceNumber(),
          publicKey: account.getPublicKey(),
        },
      ],
      {
        msgs: [
          new MsgExecuteContract(
            multisig,
            "neutron1ffus553eet978k024lmssw0czsxwr97mggyv85lpcsdkft8v9ufsz3sa07",
            {
              update_config: {
                astro_denom:
                  "ibc/5751B8BCDA688FD0A8EC0B292EEF1CDEAB4B766B63EC632778B196D317C40C3A",
                gov_channel: "channel-6",
                transfer_channel: "channel-5",
              },
            }
          ),
        ],
      }
    );

    console.log("Success: ", simulate);
  } catch (error) {
    console.log("Error: ", error);
  }
})();