Scalars

Address

An address of an externally owned account identified by a 32 byte string prefixed by 0x.

AssetId

A 32 byte unique ID used to identify a coin. On the testnet, the assetId is 0x0000000000000000000000000000000000000000000000000000000000000000.

BlockId

A unique hash identifier for a block.

Bytes32

32 bytes to hold arbitrary data, usually as a hex string. Bytes32 is the base type for cryptographic primitives like Address or Message.

ContractId

A wrapped 32byte hash that is used to uniquely identify a contract.

HexString

A way to pass in bytes as hex data. This is used for variable byte length types. Predicates and predicate data are always a hex string.

Nonce

A random or pseudo-random number generated for a single use to ensure data freshness and prevent replay attacks.

Salt

Sometimes referred to as a nonce. A unique, random value used to distinguish two things that are otherwise identical. This is used in contract deployments so you can deploy contracts that are otherwise exactly the same.

Signature

A cryptographic signature used to authorize messages and transactions.

Tai64Timestamp

A TAI 64 timestamp.

TransactionId

A unique 32 byte hash identifier for a transaction.

TxPointer

The location of the transaction in the block. It can be used by UTXOs as a reference to the transaction or by the transaction itself to make it unique.

U8

Unsigned 8 bit integer.

U32

Unsigned 32 bit integer.

U64

Unsigned 64 bit integer. The default GraphQL int scalar does not cover the range of values needed because the FuelVM word size is 64bit.

UtxoId

A unique 32 byte identifier for a UTXO.