This tutorial guides you through the process of creating and minting your own coin using the 0x1::managed_coin module on the Initia blockchain. It includes initializing your coin, obtaining metadata, minting coins, and checking the balances.

Step 1: Initialize Your Coin

To initialize your coin, you must call the 0x1::managed_coin::initialize function.

public entry fun initialize(
    account: &signer,
    maximum_supply: Option<u128>,
    name: String,
    symbol: String,
    decimals: u8,
    icon_uri: String,
    project_uri: String,
)

initiad tx move execute 0x1 managed_coin initialize \
    --args '["option<u128>:null", "string:my_coin", "string:MYCOIN", "u8:6", "string:ICON_URI", "string:PROJECT_URI"]' \
    --from [key-name] \
    --gas auto --gas-adjustment 1.5 --gas-prices 0.015uinit \
    --node [rpc-url]:[rpc-port] --chain-id [chain-id]

initiad tx move execute 0x1 managed_coin initialize \
    --args '["option<u128>:null", "string:my_coin", "string:MYCOIN", "u8:6", "string:ICON_URI", "string:PROJECT_URI"]' \
    --from [key-name] \
    --gas auto --gas-adjustment 1.5 --gas-prices 0.015uinit \
    --node [rpc-url]:[rpc-port] --chain-id [chain-id]

import {
    bcs,
    RESTClient,
    MnemonicKey,
    MsgExecute,
    Wallet,
} from '@initia/initia.js';

async function createCoin() {
const restClient = new RESTClient('https://rest.testnet.initia.xyz', {
    gasPrices: '0.015uinit',
    gasAdjustment: '1.5',
});

const key = new MnemonicKey({
    mnemonic: 'beauty sniff protect ...',
});
const wallet = new Wallet(restClient, key);

const msgs = [
    new MsgExecute(
    key.accAddress,
    '0x1',
    'managed_coin',
    'initialize',
    [],
    [
        // max supply, if you want to set max supply, insert number instaed of null
        bcs.option(bcs.u128()).serialize(null).toBase64(),
        bcs.string().serialize('my_coin').toBase64(), // name
        bcs.string().serialize('MYCOIN').toBase64(), // symbol
        // decimal point (raw value 1 consider to 10 ** (- decimalPoint))
        bcs.u8().serialize(6).toBase64(),
        bcs.string().serialize('').toBase64(), // icon uri
        bcs.string().serialize('').toBase64(), // project uri
    ]
    ),
];

// sign tx
const signedTx = await wallet.createAndSignTx({ msgs });
// send(broadcast) tx
restClient.tx.broadcastSync(signedTx).then(res => console.log(res));
// {
//   height: 0,
//   txhash: '40E0D5633D37E207B2463D275F5B479FC67D545B666C37DC7B121ED551FA18FC',
//   raw_log: '[]'
// }
}

createCoin();

Step 2: Mint Coin

To mint coins, you will use the 0x1::managed_coin::mint function.

public entry fun mint(
    account: &signer,
    dst_addr: address,
    metadata: Object<Metadata>,
    amount: u64,
)

Before minting, you need to obtain the metadata for your coin, which can be done through the 0x1::coin::metadata view function or by using sha3_256(creator+symbol+0xFE).

Obtaining Metadata

initiad query move view 0x1 coin metadata \
    --args '["address:0x...", "string:MYCOIN"]' \
    --node [rpc-url]:[rpc-port]

# data: '"0x2d81ce0b6708fccc77a537d3d1abac8c9f1f674f4f76390e3e78a89a52d4aacb"'

initiad query move view 0x1 coin metadata \
    --args '["address:0x...", "string:MYCOIN"]' \
    --node [rpc-url]:[rpc-port]

# data: '"0x2d81ce0b6708fccc77a537d3d1abac8c9f1f674f4f76390e3e78a89a52d4aacb"'

import { bcs, RESTClient, MnemonicKey } from '@initia/initia.js';
import * as crypto from 'crypto';

async function getCoinMetadata() {
    const restClient = new RESTClient('https://rest.testnet.initia.xyz', {
        gasPrices: '0.015uinit',
        gasAdjustment: '1.5',
    });

    const key = new MnemonicKey({
        mnemonic: 'beauty sniff protect ...',
    });

    // Method 1: use view function
    restClient.move
        .viewFunction(
        '0x1',
        'coin',
        'metadata',
        [],
        [
            bcs.address().serialize(key.accAddress).toBase64(),
            bcs.string().serialize('MYCOIN').toBase64(),
        ]
        )
        .then(console.log);
    // 0xcf921815f2b4827930ac01b3116ed3caad08ccd443f9df6eb22cd5344a548660

    // Method 2: use sha3-256
    console.log(coinMetadata(key.accAddress, 'MYCOIN'));
    // cf921815f2b4827930ac01b3116ed3caad08ccd443f9df6eb22cd5344a548660
}

getCoinMetadata();

function coinMetadata(creator: string, symbol: string): string {
    const OBJECT_FROM_SEED_ADDRESS_SCHEME = 0xfe;
    const addrBytes = bcs.address().serialize(creator).toBytes();
    const seed = Buffer.from(symbol, 'ascii');
    const bytes = [...addrBytes, ...seed, OBJECT_FROM_SEED_ADDRESS_SCHEME];
    const hash = crypto.createHash('SHA3-256');
    const digest = hash.update(Buffer.from(bytes)).digest();
    return digest.toString('hex');
}

Minting Coins

initiad tx move execute 0x1 managed_coin mint \
    --args '["address:0x...", "object:0x2d81ce0b6708fccc77a537d3d1abac8c9f1f674f4f76390e3e78a89a52d4aacb", "u64:100000000"]' \
    --from [key-name] \
    --gas auto --gas-adjustment 1.5 --gas-prices 0.015uinit \
    --node [rpc-url]:[rpc-port] --chain-id [chain-id]

initiad tx move execute 0x1 managed_coin mint \
    --args '["address:0x...", "object:0x2d81ce0b6708fccc77a537d3d1abac8c9f1f674f4f76390e3e78a89a52d4aacb", "u64:100000000"]' \
    --from [key-name] \
    --gas auto --gas-adjustment 1.5 --gas-prices 0.015uinit \
    --node [rpc-url]:[rpc-port] --chain-id [chain-id]

import {
    bcs,
    RESTClient,
    MnemonicKey,
    MsgExecute,
    Wallet,
} from '@initia/initia.js';
import * as crypto from 'crypto';

async function mintCoin() {
    const restClient = new RESTClient('https://rest.testnet.initia.xyz', {
        gasPrices: '0.015uinit',
        gasAdjustment: '1.5',
    });

    const key = new MnemonicKey({
        mnemonic: 'beauty sniff protect ...',
    });
    const wallet = new Wallet(restClient, key);

    const msgs = [
        new MsgExecute(
        key.accAddress,
        '0x1',
        'managed_coin',
        'mint',
        [],
        [
            bcs.address().serialize(key.accAddress).toBase64(),
            bcs
            .object()
            .serialize(coinMetadata(key.accAddress, 'MYCOIN'))
            .toBase64(),
            bcs.u64().serialize(100000000).toBase64(),
        ]
        ),
    ];

    // sign tx
    const signedTx = await wallet.createAndSignTx({ msgs });
    // send(broadcast) tx
    restClient.tx.broadcastSync(signedTx).then(res => console.log(res));
    // {
    //   height: 0,
    //   txhash: '593827F58F3E811686EC6FFDAD2E27E91DA707965F0FF33093DC071D47A46786',
    //   raw_log: '[]'
    // }
}

mintCoin();

function coinMetadata(creator: string, symbol: string): string {
    const OBJECT_FROM_SEED_ADDRESS_SCHEME = 0xfe;
    const addrBytes = bcs.address().serialize(creator).toBytes();
    const seed = Buffer.from(symbol, 'ascii');
    const bytes = [...addrBytes, ...seed, OBJECT_FROM_SEED_ADDRESS_SCHEME];
    const hash = crypto.createHash('SHA3-256');
    const digest = hash.update(Buffer.from(bytes)).digest();
    return digest.toString('hex');
}

After minting, you can check the balances to verify the minting process.

Developers

Quick Guides

VM Specific Tutorials

Integrating with Initia Apps

Tools

Creating Move Coin

Step 1: Initialize Your Coin

Step 2: Mint Coin

Obtaining Metadata

Minting Coins

Developers

Quick Guides

VM Specific Tutorials

Integrating with Initia Apps

Tools

​Step 1: Initialize Your Coin

​Step 2: Mint Coin

​Obtaining Metadata

​Minting Coins

Step 1: Initialize Your Coin

Step 2: Mint Coin

Obtaining Metadata

Minting Coins