u64

u64(value): U64Value

Defined in: src/attr/values.ts:146

A 64-bit unsigned integer, indexed for equality and range queries.

This is the width the protocol counts in: block heights, $expiresAt and the entity-nonce are all u64, so it is the type to reach for when a value has to line up with one of them. Use u256 for token amounts and anything else that can exceed 2⁶⁴.

Parameters

value

A non-negative integer, as a bigint, a safe number, or a decimal or 0x hex string.

string | number | bigint

Returns

U64Value

Throws

If the value is negative, non-integral, or wider than 64 bits.

Example

u64(1_200_000n)     // a block height
u64(Date.now())     // safe integers are accepted
u64("0x124f80")     // hex, as it comes back over JSON-RPC