​AccountId​

An AccountId is composed of a <shardNum>.<realmNum>.<accountNum> (eg. 0.0.10).

• shardNum represents the shard number (shardId). It will default to 0 today, as Hedera only performs in one shard.

• realmNum represents the realm number (realmId). It will default to 0 today, as realms are not yet supported.

• accountNum represents the account number (accountId)

Together these values make up your AccountId. When an AccountId is requested, be sure all three values are included.

Constructor

Methods

Example

AccountId accountId = new AccountId(0 ,0 ,10);
System.out.println(accountId);
​
// Constructs an accountId from String
AccountId accountId = AccountId.fromString("0.0.10");
System.out.println(accountId);
​

const acctId = new AccountId(100);
console.log(`${acctId}`);
​
// Construct accountId from String
const acctId = AccountId.fromString(`100`);
console.log(`${acctId}`);

​FileId​

A FileId is composed of a <shardNum>.<realmNum>.<fileNum> (eg. 0.0.15).

• shardNum represents the shard number (shardId). It will default to 0 today, as Hedera only performs in one shard.

• realmNum represents the realm number (realmId). It will default to 0 today, as realms are not yet supported.

• fileNum represents the file number

Together these values make up your accountId. When an FileId is requested, be sure all three values are included.

Constructor

Methods

Example

FileId fileId = new FileId(0,0,15);
System.out.println(fileId);
​
//Contructs a FileId from string
FileId fileId = FileId.fromString("0.0.15");
System.out.println(fileId);

const newFileId = new FileId(100);
console.log(`${newFileId}`);
​
//Construct a fileId from a String
const newFileIdFromString = FileId.fromString(`100`); 
console.log(`${newFileIdFromString}`);

​ContractId​

A ContractId is composed of a <shardNum>.<realmNum>.<contractNum> (eg. 0.0.20).

• shardNum represents the shard number (shardId). It will default to 0 today, as Hedera only performs in one shard.

• realmNum represents the realm number (realmId). It will default to 0 today, as realms are not yet supported.

• contractNum represents the contract number

Together these values make up your ContractId. When an ContractId is requested, be sure all three values are included. ContractId's are automatically assigned when you create a new smart contract.

Constructor

Methods

Example

ContractId contractId = new ContractId(0,0,20);
System.out.println(contractId);
​
// Constructs a ContractId from string
ContractId contractId = ContractId.fromString("0.0.20");
System.out.println(contractId);

const newContractId = new ContractId(100);
console.log(`${newContractId}`);
​
// Construct a contractId from a String
const newContractId = ContractId.fromString(`100`); 
console.log(`${newContractId}`);

​TransactionId​

A TransactionId is composed of the current time and account that is primarily signing the transaction. Every transaction has an associated TransactionId. Transaction IDs are automatically assigned for every transaction that is submitted to the network.

Constructor

Example

TransactionId transactionId = new TransactionId(myAccountId);

const txId = new TransactionId(newAccountId);
console.log(`${txId}`);

​TopicId​

A topicId is composed of a <shardNum>.<realmNum>.<topicNum> (eg. 0.0.100).

• shardNum represents the shard number (shardId). It will default to 0 today, as Hedera only performs in one shard.

• realmNum represents the realm number (realmId). It will default to 0 today, as realms are not yet supported.

• topicNum represents the topic number (topicId)

Constructor

Example

ConsensusTopicId topicId = new ConsensusTopicId(0,0,100);
System.out.println(topicId)

const txId = new TransactionId(newAccountId);
console.log(`${txId}`);