Minting Tokens

There are three mint variants depending on how the amount is provided.

1

Public Mint (plain uint256)

Requires publicAmountsEnabled = true (default). Only callable by MINTER_ROLE.

// Hardhat / ethers.js
const token = await hre.ethers.getContractAt("MyPrivateToken", tokenAddress);
const amount = hre.ethers.parseUnits("1000", 18); // 1000 tokens
const tx = await token.mint(recipientAddress, amount, { gasLimit: 5000000 });
await tx.wait();
console.log("Minted 1000 tokens to", recipientAddress);

2

Encrypted Mint (itUint256)

For privacy-preserving minting where the amount is encrypted by the caller.

const { prepareIT256 } = require("@coti-io/coti-sdk-typescript");

// Build the encrypted amount
const MINT_SELECTOR = ethers.id("mint(address,((uint256,uint256),bytes))").slice(0, 10);
const wallet = new ethers.Wallet(process.env.PRIVATE_KEY, ethers.provider);

const it = prepareIT256(
    BigInt(hre.ethers.parseUnits("500", 18)), // 500 tokens
    { wallet, userKey: process.env.PRIVATE_AES_KEY_TESTNET },
    tokenAddress,
    MINT_SELECTOR
);

const tx = await token.connect(minterSigner)["mint(address,((uint256,uint256),bytes))"](
    recipientAddress,
    [[it.ciphertext.ciphertextHigh, it.ciphertext.ciphertextLow], it.signature],
    { gasLimit: 5000000 }
);
await tx.wait();

3

GT Mint (gtUint256)

For contract-to-contract flows where you already hold a gtUint256 in memory (e.g. inside a bridge contract).

// Inside a Solidity contract with MINTER_ROLE
gtUint256 gtAmount = MpcCore.setPublic256(depositAmount);
gtBool success = token.mintGt(recipient, gtAmount);
require(MpcCore.decrypt(success), "Mint failed");

Note: mintGt and mint(itUint256) return gtBool — they do NOT revert on failure. Always decrypt and check the return value.