Mint a token - Hedera

Minting fungible token allows you to increase the total supply of the token. Minting a non-fungible token creates an NFT with its unique metadata for the class of NFTs defined by the token ID. The Supply Key must sign the transaction.

If no Supply Key is defined, the transaction will resolve to TOKEN_HAS_NO_SUPPLY_KEY. The maximum total supply a token can have is 2^63-1.
The amount provided must be in the lowest denomination possible.
- Example: Token A has 2 decimals. In order to mint 100 tokens, one must provide an amount of 10000. In order to mint 100.55 tokens, one must provide an amount of 10055.
The metadata field is specific to NFTs. Once an NFT is minted, the metadata cannot be changed and is immutable.
- You can use the metadata field to add a URI that contains additional information about the token. You can view the metadata schema here. The metadata field has a 100-character limit.
The serial number for the NFT is returned in the receipt of the transaction.
When minting NFTs, do not set the amount. The amount is used for minting fungible tokens only.
This transaction accepts zero unit minting operations for fungible tokens (HIP-564)

Transaction Signing Requirements

Supply key
Transaction fee payer account key

Transaction Fees

Please see the transaction and query fees table for the base transaction fee.
Please use the Hedera fee estimator to estimate your transaction fee cost.

Methods

Method	Type	Description	Requirement
`setTokenId(<tokenId>)`	TokenId	The token ID for which to mint additional tokens	Required
`setAmount(<amount>)`	long	Applicable to tokens of type `FUNGIBLE_COMMON`.The amount to mint to the Treasury Account. The amount must be a positive non-zero number represented in the lowest denomination of the token. The new supply must be lower than `2^63-1`.	Optional
`setMetadata(<metaDatas>)`	List<byte[]>	Applicable to tokens of type `NON_FUNGIBLE_UNIQUE`. A list of metadata that are being created. The maximum allowed size of each metadata is 100 bytes and is immutable.	Optional
`addMetadata(<metaData>)`	byte []	Applicable to tokens of type `NON_FUNGIBLE_UNIQUE`. A list of metadata that are being created. The maximum allowed size of each metadata is 100 bytes and is immutable.	Optional

//Mint another 1,000 tokens
TokenMintTransaction transaction = new TokenMintTransaction()
     .setTokenId(tokenId)
     .setMaxTransactionFee(new Hbar(20)) //Use when HBAR is under 10 cents
     .setAmount(1000);

//Freeze the unsigned transaction, sign with the supply private key of the token, submit the transaction to a Hedera network
TransactionResponse txResponse = transaction
     .freezeWith(client)
     .sign(supplyKey)
     .execute(client);

//Request the receipt of the transaction
TransactionReceipt receipt = txResponse.getReceipt(client);

//Obtain the transaction consensus status
Status transactionStatus = receipt.status;

System.out.println("The transaction consensus status is " +transactionStatus;

//v2.0.1

​Methods

Methods