Function U128

U128(value: bigint): RelishU128
Creates an unsigned 128-bit integer Relish value using JavaScript BigInt.

Use for extremely large unsigned integers not representable in 64 bits.
Parameters
- value: bigint
  BigInt in range 0-340282366920938463463374607431768211455
Returns RelishU128
RelishU128 value
Throws
Error if value is out of range
Example
```
import { U128 } from '@grounds/core';

const valid = U128(BigInt('340282366920938463463374607431768211455'));
const zero = U128(0n);

// Runtime errors:
// U128(-1n) // Error: out of range
// U128(BigInt('340282366920938463463374607431768211456')) // Error: out of range
```
See
U64 for 64-bit unsigned