Minting Transactions

Minting and burning assets with Native Script and Plutus Script

Minting and burning assets is a common operation in blockchain applications. In the Cardano ecosystem, minting and burning are achieved through Native Scripts and Plutus Scripts.

To view a video demonstration of this feature of the MeshSDK, navigate to the video guide Mint an NFT Collection.

In this page, you will find the APIs to create transactions for minting and burning assets.

Minting with One Signature

In this section, we will see how to mint native assets with a MeshTxBuilder. For minting assets with smart contract, visit MeshTxBuilder - 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 changeAddress = await wallet.getChangeAddress();
const forgingScript = ForgeScript.withOneSignature(changeAddress);

Then, we define the metadata.

const demoAssetMetadata = {
  name: "Mesh Token",
  image: "ipfs://QmRzicpReutwCkM6aotuKjErFCUD213DpwPq6ByuzMJaua",
  mediaType: "image/jpg",
  description: "This NFT was minted by Mesh (https://meshjs.dev/).",
};
const policyId = resolveScriptHash(forgingScript);
const tokenName = "MeshToken";
const tokenNameHex = stringToHex(tokenName);
const metadata = { [policyId]: { [tokenName]: { ...demoAssetMetadata } } };

Finally, we create a transaction and mint the asset with the lower level APIs.

const txBuilder = new MeshTxBuilder({
  fetcher: provider, // get a provider https://meshjs.dev/providers
  verbose: true,
});

const unsignedTx = await txBuilder
  .txIn(utxo.input.txHash, utxo.input.outputIndex)
  .mint("1", policyId, tokenName)
  .mintingScript(forgingScript)
  .changeAddress(changeAddress)
  .complete();

Example code:

import { MeshTxBuilder, ForgeScript, resolveScriptHash, stringToHex } from '@meshsdk/core';
import type { Asset } from '@meshsdk/core';

const utxos = await wallet.getUtxos();
const changeAddress = await wallet.getChangeAddress();
const forgingScript = ForgeScript.withOneSignature(changeAddress);

const demoAssetMetadata = {
  name: "Mesh Token",
  image: "ipfs://QmRzicpReutwCkM6aotuKjErFCUD213DpwPq6ByuzMJaua",
  mediaType: "image/jpg",
  description: "This NFT was minted by Mesh (https://meshjs.dev/).",
};
const policyId = resolveScriptHash(forgingScript);
const tokenName = "MeshToken";
const tokenNameHex = stringToHex(tokenName);
const metadata = { [policyId]: { [tokenName]: { ...demoAssetMetadata } } };

const txBuilder = new MeshTxBuilder({
  fetcher: provider, // get a provider https://meshjs.dev/providers
  verbose: true,
});

const unsignedTx = await txBuilder
  .mint("1", policyId, tokenNameHex)
  .mintingScript(forgingScript)
  .metadataValue(721, metadata)
  .changeAddress(changeAddress)
  .selectUtxosFrom(utxos)
  .complete();

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

Check out the Mesh website to see the full list of APIs.