Minting Transactions

Learn to use ForgeScript to create minting transactions for minting and burning native assets.

Minting Assets

In this section, we will see how to mint native assets with a ForgeScript. For minting assets with smart contract, visit Transaction - Smart Contract - Minting Assets with Smart Contract.

Firstly, we need to define the forgingScript with ForgeScript. We use the first wallet address as the "minting address" (you can use other addresses).

const usedAddress = await wallet.getUsedAddresses();
const address = usedAddress[0];
const forgingScript = ForgeScript.withOneSignature(address);

Then, we define the metadata.

const assetMetadata: AssetMetadata = {
  "name": "Mesh Token",
  "image": "ipfs://QmRzicpReutwCkM6aotuKjErFCUD213DpwPq6ByuzMJaua",
  "mediaType": "image/jpg",
  "description": "This NFT is minted by Mesh (https://meshjs.dev/)."
};
const asset: Mint = {
  assetName: 'MeshToken',
  assetQuantity: '1',
  metadata: assetMetadata,
  label: '721',
  recipient: 'addr_test1vpvx0sacufuypa2k4sngk7q40zc5c4npl337uusdh64kv0c7e4cxr' 
};
tx.mintAsset(
  forgingScript,
  asset,
);

Here is the full code:

import { Transaction, ForgeScript } from '@meshsdk/core';
import type { Mint, AssetMetadata } from '@meshsdk/core';

// prepare forgingScript
const usedAddress = await wallet.getUsedAddresses();
const address = usedAddress[0];
const forgingScript = ForgeScript.withOneSignature(address);

const tx = new Transaction({ initiator: wallet });

// define asset#1 metadata
const assetMetadata1: AssetMetadata = {
  "name": "Mesh Token",
  "image": "ipfs://QmRzicpReutwCkM6aotuKjErFCUD213DpwPq6ByuzMJaua",
  "mediaType": "image/jpg",
  "description": "This NFT is minted by Mesh (https://meshjs.dev/)."
};
const asset1: Mint = {
  assetName: 'MeshToken',
  assetQuantity: '1',
  metadata: assetMetadata1,
  label: '721',
  recipient: 'addr_test1vpvx0sacufuypa2k4sngk7q40zc5c4npl337uusdh64kv0c7e4cxr',
};
tx.mintAsset(
  forgingScript,
  asset1,
);

const unsignedTx = await tx.build();
const signedTx = await wallet.signTx(unsignedTx);
const txHash = await wallet.submitTx(signedTx);

Additionally, you can define the forging script with NativeScript. For example if you want to have a policy locking script, you can do this:

import type { NativeScript } from '@meshsdk/core';

const nativeScript: NativeScript = {
  type: 'all',
  scripts:
  [
    {
      type: 'before',
      slot: '<insert slot here>'
    },
    {
      type: 'sig',
      keyHash: '<insert keyHash here>'
    }
  ]
};

const forgingScript = ForgeScript.fromNativeScript(nativeScript);

To get the keyHash, use the resolvePaymentKeyHash(). To get the slot, use the resolveSlotNo(). See Resolvers.

Note: If you were expecting a particular Policy ID but received an entirely different one, try switching the order of the objects inside the scripts as the order of the objects matters and must match the order used before.

Mint assets and send to recipients

Add or remove recipients, input the address and define the asset metadata to mint and send to recipients.

Recipients
Recipient #1
No wallets installed

Burning Assets

Like minting assets, we need to define the forgingScript with ForgeScript. We use the first wallet address as the "minting address". Note that, assets can only be burned by its minting address.

const usedAddress = await wallet.getUsedAddresses();
const address = usedAddress[0];
const forgingScript = ForgeScript.withOneSignature(address);

Then, we define Asset and set tx.burnAsset()

const asset: Asset = {
  unit: '64af286e2ad0df4de2e7de15f8ff5b3d27faecf4ab2757056d860a424d657368546f6b656e',
  quantity: '1',
};
tx.burnAsset(forgingScript, asset);

Here is the full code:

import { Transaction, ForgeScript } from '@meshsdk/core';
import type { Asset } from '@meshsdk/core';

// prepare forgingScript
const usedAddress = await wallet.getUsedAddresses();
const address = usedAddress[0];
const forgingScript = ForgeScript.withOneSignature(address);

const tx = new Transaction({ initiator: wallet });

// burn asset#1
const asset1: Asset = {
  unit: '64af286e2ad0df4de2e7de15f8ff5b3d27faecf4ab2757056d860a424d657368546f6b656e',
  quantity: '1',
};
tx.burnAsset(forgingScript, asset1);

const unsignedTx = await tx.build();
const signedTx = await wallet.signTx(unsignedTx);
const txHash = await wallet.submitTx(signedTx);
Select assets to burn

Select the assets and input the quantity you wish to burn. Note this demo we only selects up to 9 random assets.

AssetsQuantity to burn
No wallets installed