Associate tokens to an account

Associates the provided Hedera account with the provided Hedera token(s). Hedera accounts must be associated with a fungible or non-fungible token first before you can transfer tokens to that account. When you transfer a custom fungible or non-fungible token to the alias account ID, the token association step is skipped and the account will automatically be associated with the token upon creation. In the case of NON_FUNGIBLE Type, once an account is associated, it can hold any number of NFTs (serial numbers) of that token type. The Hedera account that is associated with a token is required to sign the transaction.

• If the provided account is not found, the transaction will resolve to INVALID_ACCOUNT_ID.

• If the provided account has been deleted, the transaction will resolve to ACCOUNT_DELETED.

• If any of the provided tokens is not found, the transaction will resolve to INVALID_TOKEN_REF.

• If any of the provided tokens has been deleted, the transaction will resolve to TOKEN_WAS_DELETED.

• If an association between the provided account and any of the tokens already exists, the transaction will resolve to TOKEN_ALREADY_ASSOCIATED_TO_ACCOUNT.

• If the provided account's associations count exceeds the constraint of maximum token associations per account, the transaction will resolve to TOKENS_PER_ACCOUNT_LIMIT_EXCEEDED.

• On success, associations between the provided account and tokens are made and the account is ready to interact with the tokens.

There is currently no limit on the number of token IDs that can be associated with an account (reference HIP-367). Still, you can see TOKENS_PER_ACCOUNT_LIMIT_EXCEEDED responses for pre-HIP-367 transactions.

Transaction Signing Requirements

• The key of the account the token is being associated to

• 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
setAccountId(<accountId>)	AccountId	The account to be associated with the provided tokens	Required
setTokenIds(<tokens>)	List <TokenId>	The tokens to be associated with the provided account	Required

Java

//Associate a token to an account
TokenAssociateTransaction transaction = new TokenAssociateTransaction()
        .setAccountId(accountId)
        .setTokenIds(Collections.singletonList(tokenId));

//Freeze the unsigned transaction, sign with the private key of the account that is being associated to a token, submit the transaction to a Hedera network
TransactionResponse txResponse = transaction.freezeWith(client).sign(accountKey).execute(client);

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

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

System.out.println("The transaction consensus status " +transactionStatus);
//v2.0.4

JavaScript

//Associate a token to an account and freeze the unsigned transaction for signing
const transaction = await new TokenAssociateTransaction()
     .setAccountId(accountId)
     .setTokenIds([tokenId])
     .freezeWith(client);

//Sign with the private key of the account that is being associated to a token 
const signTx = await transaction.sign(accountKey);

//Submit the transaction to a Hedera network    
const txResponse = await signTx.execute(client);

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

//Get the transaction consensus status
const transactionStatus = receipt.status;

console.log("The transaction consensus status " +transactionStatus.toString());

//v2.0.7

Go

//Associate the token to an account and freeze the unsigned transaction for signing
transaction, err := hedera.NewTokenAssociateTransaction().
        SetAccountID(accountId).
        SetTokenIDs(tokenId).
        FreezeWith(client)

if err != nil {
    panic(err)
}

//Sign with the private key of the account that is being associated to a token, submit the transaction to a Hedera network
txResponse, err = transaction.Sign(accountKey).Execute(client)

if err != nil {
    panic(err)
}

//Request the receipt of the transaction
receipt, err = txResponse.GetReceipt(client)

if err != nil {
    panic(err)
}

//Get the transaction consensus status
status := receipt.Status

fmt.Printf("The transaction consensus status is %v\n", status)

//v2.1.0