Icon HelpCircleForumIcon Link

⌘K

Icon HelpCircleForumIcon Link
Docs /
Fuels Ts /
Types /
Bytes

Icon LinkBytes

A dynamic array of byte values can be represented using the Bytes type, which represents raw bytes. 

// #import { Bytes };
 
const bytes: Bytes = [40, 41, 42];
 
const { value } = await contract.functions
	.bytes_comparison(bytes)
	.txParams({ gasLimit: 10_000 })
	.simulate();
 
expect(value).toBeTruthy();

Icon LinkUsing Bytes

The Bytes type can be integrated with your contract calls. Consider the following contract that can compare and return a Bytes: 

contract;
 
use std::bytes::Bytes;
 
abi BytesTest {
fn echo_bytes(value: Bytes) -> Bytes;
fn bytes_comparison(value: Bytes) -> bool;
}
 
impl BytesTest for Contract {
fn echo_bytes(value: Bytes) -> Bytes {
	value
}
 
fn bytes_comparison(value: Bytes) -> bool {
	let mut bytes = Bytes::new();
 
	bytes.push(40u8);
	bytes.push(41u8);
	bytes.push(42u8);
 
	value == bytes
}
}

A Bytes array can be created using a native JavaScript array of numbers or Big Numbers, and sent to a Sway contract: 

// #import { Bytes };
 
const bytes: Bytes = [8, 42, 77];
 
const { value } = await contract.functions
	.echo_bytes(bytes)
	.txParams({ gasLimit: 10_000 })
	.simulate();
 
expect(value).toStrictEqual(new Uint8Array(bytes));