Bytes In Fuel, a type called Bytes represents a collection of tightly-packed bytes. The Rust SDK represents Bytes as Bytes(Vec<u8>). Here's an example of using Bytes in a contract call:
let bytes = Bytes(vec![40, 41, 42]);
contract_methods.accept_bytes(bytes).call().await?; If you have a hexadecimal value as a string and wish to convert it to Bytes, you may do so with from_hex_str:
let hex_str = "0101010101010101010101010101010101010101010101010101010101010101";
let bytes = Bytes::from_hex_str(hex_str)?;
assert_eq!(bytes.0, vec![1u8; 32]);
// With the `0x0` prefix
let hex_str = "0x0101010101010101010101010101010101010101010101010101010101010101";
let bytes = Bytes::from_hex_str(hex_str)?;
assert_eq!(bytes.0, vec![1u8; 32]);