DAOhaus v2
Build a Boost

How to Build a Boost (Mint a Million)

Creating a DAOhaus Boost is a way to add functionality to the DAOhaus Interface (opens in a new tab).

This tutorial will show you how to create a Contract Boost. Contract Boosts enable your DAO to initiate an interaction with an external smart contract.

This "Mint a Million" Contract Boost will allow a DAO to create an ERC-20 token with 1 million supply using a Factory Contract (opens in a new tab) we have supplied for you. The token will be managed by a Minion and Safe in your DAO.

Learn more about the DAOhaus Proposal Process

Learn more about Minions & Safes

Contract Boost Overview

To build a Contract Boost, there are 3 primary components you'll need to create:

  1. Form: The form used to collect data from the proposer that is needed to execute the external contract interaction.
  2. Contract: The contract address and the Applicaton Binary Interface (ABI) provided by the contract.
  3. Transaction Schema: The data to send to the contract when the proposal passes.

Learn more about Boosts at the Boosts Overview page here


Throughout this tutorial, we have annotated video timings in the format of (XX:XX), so you can refer to the video for more details

Getting Started

This tutorial was created using Terminal on MacOS. If you are using a different OS, you may have to change some of these commands, but the process will be the same.

Clone and configure your local git repo:

Follow these steps to clone the daohaus-app github repo (opens in a new tab) and create a branch with the format mint_a_million_<yourdiscordhandle>.

Remember to replace <yourdiscordhandle> with your Discord handle. This helps us when providing support.

  • git clone https://github.com/HausDAO/daohaus-app.git
  • cd daohaus-app
  • git branch mint_a_million_<yourdiscordhandle>
  • git checkout mint_a_million_<yourdiscordhandle>
  • touch .env
  • Open the .env file you just created with touch in your root directory and add the following:

REACT_APP_INFURA_PROJECT_ID= `Your Infura Project ID here`

If you don't have an RPC_URI or INFURA_PROJECT_ID, you can delete those lines. You can complete this tutorial without them, but you won't be able to initiate contract transactions from your local machine.

Install dependencies and launch:

From the root of your application:

  • Run yarn install to install dependencies
  • Run yarn start to launch the DAOhaus app

For guidelines on contributing to DAOhaus repositories, refer to the Contribution Guidelines

1. Build your Form (31:52 (opens in a new tab))

In this step, we will set up your Contract Boost's proposal form and fields that are required to create the proposal and execute the external contract call.

1.1 Create mintAMillionForms.js (opens in a new tab) in src/data/formLegos/ for your Boost

Create a new file in directory daohaus-app/src/data/formLegos named mintAMillionForms.js

Add the following code to mintAMillionForms.js:


This file will export a single React object that will be used to generate a form for your Boost in the DAOhaus App. It is possible to create multiple forms in a file, but we will just be creating 1 form here called SUMMON_TOKEN

1.2 Import and add MILLION_FORMS object to src/data/formLegos/forms.js

src/data/formLegos/forms.js is the central directory for all forms available in the DAOhaus app. This step imports and stores the MILLION_FORMS object (i.e. Mint a Million form formats) in the central directory.

Import and add the form:

  • Add import { MILLION_FORMS } from './mintAMillionForms'; to the list of imports in forms.js
  • Next add ...MILLION_FORMS to the FORM object.

1.3 Preview your Form

The dev: true flag from step 1.1 will let you see your form in the 'DEV Test List' playlist - a special playlist used for testing. It will be visible only because you added REACT_APP_DEV=true to your .env file above. This allows you to access and test the proposal before it is complete.

Playlists are groupings of Boosts that are related to one another. DEV Test List playlist is a special playlist specifically for the development environment.

To preview your form in the Proposal Playlist, you will need to have an existing DAO locally. If you have not already summoned a DAO, you can summon one at localhost:3000/summon

See the Quick Start guide for instructions to quickly summon a test DAO

Learn more about Summoning DAOs

Preview your form:

  • First, yarn start and Load the app at http://localhost:3000.
  • Navigate to your DAO and click on View Proposals then New Proposal to open the Proposal Playlist modal.
  • Click the Manage gear icon to reveal the DEV Test List playlist.

You should now be able to see a Playlist called "DEV Test List" with the "Mint a Million" Proposal type. (51:32 (opens in a new tab))

Good job! You've created and previewed your Boost form. Obviously, the form does not have any fields yet. We will add those in the following steps, but first we'll do some configuration that allows the form to initiate a proposal.

1.4 Add a new Proposal Type in src/utils/proposalUtils.jsx

Add MINT_A_MILLION: 'Mint a Million', to the PROPOSAL_TYPES object in src/utils/proposalUtils.jsx.

proposalsUtils.js is the central directory for all proposal utilities available in the DAOhaus app. This step signals to the DAOhaus App that it should consider your boost proposal as a valid proposal type.

Recall that we added a reference to: PROPOSAL_TYPES.MINT_A_MILLION to /src/data/formLegos/mintaMillionForms.js in Section 1.1


1.5 Adding Fields

When creating the form, we need to create fields to collect data (in this case: Supply, Name, Symbol, Receiver) from users to initiate the contract call.

View the contract we'll be calling on Etherscan: Summon Token Contract (opens in a new tab).

In this form, we will include:

  1. A Select a Minion field to indicate which minion will own the newly minted ERC-20 tokens (aka the Receiver)
  2. A Token Name field for the token's name (e.g My Cool Token)
  3. A Token Symbol field for the token's symbol (e.g. MCT)

We will not be asking for token supply because we are hardcoding it to 1,000,000 (hence the name 'Mint a Million')

1.5.1 Add FIELD.MINION.SELECT as the first field (49:58 (opens in a new tab))

In mintAMillionForms.js add a minion select field to your fields array:

    fields: [
      // Specifies fields to be shown on the form

FIELD.MINION_SELECT is a prebuilt form field provided for you by the DAOhaus app. It will create a dropdown with all of the DAO's minions. This field will give us access to the Safe Minion address, which we will need to construct our transaction in Step 3.

Note that [FIELD.MINION_SELECT] is an array inside of the fields[] array. Nested arrays are used to create columns in DAOhaus forms.

1.5.2 Create a custom field for Token Name and Symbol

Modify mintAMillionForms.js to add these custom fields to your fields array:

fields: [
      //left column
        // Specifies fields to be shown on the form
      //right column
          type: 'input', // Standard HTML input
          label: 'Token Name', // Renders this as form title
          name: 'tokenName', // This is how the field will be referenced across files
          htmlFor: 'tokenName',
          placeholder: 'Token Name', // Placeholder text
          expectType: 'any', // Type check (e.g. 'number')
          type: 'input',
          label: 'Token Symbol',
          name: 'tokenSymbol',
          htmlFor: 'tokenSymbol',
          placeholder: 'Token Symbol',
          expectType: 'any',

There are many field types in the DAOhaus App that you can reuse for your form. In this case, we will create custom form fields to collect the token name and the token symbol.

For more information on Form Legos, refer to Form Legos

A Note on Form Columns: The fields array includes a subarray that holds the form fields. If your form requires multiple field columns, create subarrays (one for each column) within the fields array. Form elements in these separate subarrays will appear in separate columns.

Your form should look like this:

Remember to preview your own form in the DEV Test Playlistafter each step by repeating step 1.3 above

1.5.3 Make all fields required

For this form, we need DAO members to fill in all three fields (i.e. Select a Minion, Token Name & Token Symbol).

Add the name property of each field into the required array. Required means if the user does not provide these fields, the form will not submit.

Your completed mintAMillionForms.js file should look like this:


Your completed form, with asterixes indicating required fields, should look like this:

Preview your form one more time in the DEV Test Playlist to make sure your form matches the above.

Bonus: Try modifying the array structure in your form to show all of the fields in one column

2. Import your Contract

Now that your proposal form is ready, let's set up the contracts that your Boost will be interacting with.

Step 2.1: Add your contract address in src/utils/chain.js

The chain.js file stores all the contract addresses that the application needs to have access to. Contract addresses are separated by network chains (e.g. Ethereum Mainnet, Rinkeby, etc.)

Our contract exists on Rinkeby, so we will add the contract address to the Rinkeby object. The Mint a Million Contract address is 0xe4E893AffD33dDED43ECdf8bBC550639c84485e5

Add erc20_summon:'0xe4E893AffD33dDED43ECdf8bBC550639c84485e5', to the '0x4' (i.e. Rinkeby) object. Your field can technically be added anywhere in the object, but let's add it after the moloch_factor_addr in chain.js field to keep things organized:

'0x4': {
   name: 'Ethereum Rinkeby',
    short_name: 'rinkeby',
    shortNamePrefix: 'rin',
    nativeCurrency: 'ETH',
    network: 'rinkeby',
    network_id: 4,
    chain_id: '0x4',
    minion_factory_addr: '0x313F02A44089150C9ff7011D4e87b52404A914A9',
    moloch_factory_addr: '0xC33a4EfecB11D2cAD8E7d8d2a6b5E7FEacCC521d',
    erc20_summon: '0xe4E893AffD33dDED43ECdf8bBC550639c84485e5', // Our contract address

2.2 Create a new object in src/data/contracts.js

Open src/data/contracts.js and add the following ERC_20_SUMMON object to the CONTRACTS object:

export const CONTRACTS = {
  ERC_20_SUMMON: {
    location: 'local',
    abiName: 'ERC_20_SUMMON',
    contractAddress: '.contextData.chainConfig.erc20_summon',

The DAOhaus app uses a . search notation to point to data / properties within objects in the codebase. For instance, the contractAddress: '.contextData.chainConfig.erc20_summon', will point to the erc20_summon property within the chainConfig object that you added in Step 2.1 above

2.3 Add contract ABIs to erc20Summon.json

First create a new file erc20Summon.json in src/contracts (1:07:33 (opens in a new tab))

Next, navigate to the Mint a Million contract (opens in a new tab) on Etherscan.

Then, copy and paste the ABIs for this contract by clicking the 'Copy All to clipboard' button in the Contract ABI section. Paste the Contract ABI into erc20Summon.json

These ABIs will be used by the DAOhaus app when creating a transaction and interacting with the smart contract's available functions.

You can see a completed example in the Mint a Million example repo: erc20Summon.json (opens in a new tab)

2.4 Import the contract ABIs into src/utils/abi.js (1:08:10 (opens in a new tab))

The abi.json file is a central directory of all contract ABIs which the DAOhaus app will interact with. This step imports and stores the ERC_20_SUMMON object (i.e. Mint a Million Factory contract ABIs) into the central directory.

Open src/utils/abi.js and add the following 2 lines:

import ERC_20_SUMMON from '../contracts/erc20Summon.json'


The resulting file should look something like this:

import { encodeMultiSend } from '@gnosis.pm/safe-contracts';
import Web3 from 'web3';
import { Contract, BigNumber } from 'ethers';
import MOLOCH_TOKEN_FACTORY from '../contracts/molochTokenFactory.json';
import ERC_20_SUMMON from '../contracts/erc20Summon.json' // ADD THIS
export const LOCAL_ABI = Object.freeze({

Verify that the ERC_20_SUMMON property matches in both src/utils/abi.js and src/data/contracts.js

2.5 Create a new Proposal Type in src/data/details.js

Add the following code to the DETAILS object

    title: 'Mint a Million!!!',
    proposalType: '.formData.type',

The title object will determine the Proposal title on the Proposal Card within the DAOhaus app.

The proposalType object will reference the proposal type, which appears in different places in the DAOhaus UI. .formData.type references the fields you added to src/utils/proposalUtils.jsx earlier in the tutorial.

At the end of this step, you have done the necessary set up for your contracts within the DAOhaus app. The next step will be to build and test your transaction!

3. Build your Transaction

3.1 Create millionTx.js in src/data/txLegos (1:11:45 (opens in a new tab))

First, create a new file called millionTx.js in src/data/txLegos

Next, add the following code to the file to export the MILLION_TX object.

Note that the SUMMON_TOKEN property matches the property we added to mintAMillionForms.js This detail will be important when you create your own custom boost.

import { buildMultiTxAction } from "../../utils/legos";
import { CONTRACTS } from "../contracts";
export const MILLION_TX = {
  SUMMON_TOKEN: buildMultiTxAction({
    actions: [
        targetContract: ".contextData.chainConfig.erc20_summon", // Location for Contract Address (Added in the previous step)
        abi: CONTRACTS.ERC_20_SUMMON, // Contract ABI (Added in the previous step)
        fnName: "summonToken", // Function name in ABI
        args: [],

3.2 Add your transaction arguments

Recall that we pasted these fields into the erc20Summon.json file after copying them from the Contract ABI section on Etherscan:

"inputs": [
  { "internalType": "uint256", "name": "supply", "type": "uint256" },
  { "internalType": "string", "name": "name", "type": "string" },
  { "internalType": "string", "name": "symbol", "type": "string" },
  { "internalType": "address", "name": "receiver", "type": "address" }

In our new file millionTx.js we need to specify the arguments for the transaction in the same order as they are defined by the Contract ABI.

Add the following arguments to the args property in millionTx.js:

args: [
  '1000000000000000000000000', // Supply (Hardcoded to 1 million in Gwei)
  '.values.tokenName', // Token Name
  '.values.tokenSymbol', // Token Symbol
  '.values.selectedSafeAddress', // Safe Address as the owner

The first argument above is a hardcoded value of 1000000000000000000000000 (i.e. 1,000,000 in Gwei) to automatically mint a million tokens.

The remaining arguments will be provided by the user through form inputs. The DAOhaus app uses React Hooks in its forms, returning form inputs in an object called values.

In the example above, we used dot notation to extract the values provided by the users of the form for the next three arguments (i.e.tokenName, tokenSymbol & selectedSafeAddress). Selected Safe Address is made available by the MINION_SELECT form field we specified in step 1.5.1

When building the transaction, the above values will be submitted as a part of the transaction. This will mint 1,000,000 tokens with tokenName and tokenSymbol specified by the user, specificing the Minion Safe selectedSafeAddress as the owner.

3.3 Add the proposal's detailstoJSON reference

Import the DETAILS object into millionTX.js:

import { DETAILS } from "../details";

Add the following property to the SUMMON_TOKEN object:


The detailstoJSON property refers to the object added to details.js (Step 2.6) which contains all proposal details required for rendering proposals (e.g. title, description, etc.)

At the end of this step, your code in millionTX.js should look like this

import { buildMultiTxAction } from "../../utils/legos";
import { CONTRACTS } from "../contracts";
// highlight-next-line
import { DETAILS } from "../details";
export const MILLION_TX = {
  SUMMON_TOKEN: buildMultiTxAction({
    actions: [
        targetContract: ".contextData.chainConfig.erc20_summon",
        abi: CONTRACTS.ERC_20_SUMMON,
        fnName: "summonToken",
        // highlight-start
        args: [
        // highlight-end
    // highlight-next-line

3.4 Import the MILLION_TX object into src/txLegos/contractTX.js

First, add the following code to import the MILLION_TX object.

import { MILLION_TX } from "./millionTX";

Next, add


to the TX object in src/txLegos/contractTX.js.

Once this step is complete, you are ready to test your transaction to mint a million tokens.

Navigate to your Proposals and submit a Mint a Million Proposal to test your Boost!

4. Submit a PR to the daohaus-app repository

When you've completed your Mint a Million Boost, submit a Github Pull Request (opens in a new tab) with your own branch mint_a_million_<yourdiscordhandle>.

We'd love to check out what you've built and reach out for support or feedback.

You are now ready to create a Boost to interact with any external smart contracts - just swap out the contracts and fields you used above! What will you create next?

If you are building a custom boost, please reach out to @arentweall + @ui369 on the DAOhaus Discord server (opens in a new tab) and let us know! We'd love to provide developer support for your Boost!