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fluentbase_runtime/syscall_handler/hashing/
blake3.rs

1/// This function will be removed in the future.
2/// We keep it only for backward compatibility with testnet.
3use crate::RuntimeContext;
4use fluentbase_types::B256;
5use rwasm::{StoreTr, TrapCode, Value};
6
7pub fn syscall_hashing_blake3_handler(
8    caller: &mut impl StoreTr<RuntimeContext>,
9    params: &[Value],
10    _result: &mut [Value],
11) -> Result<(), TrapCode> {
12    let (data_offset, data_len, output_offset) = (
13        params[0].i32().unwrap() as usize,
14        params[1].i32().unwrap() as usize,
15        params[2].i32().unwrap() as usize,
16    );
17    let mut data = vec![0u8; data_len];
18    caller.memory_read(data_offset, &mut data)?;
19    let hash = syscall_hashing_blake3_impl(&data);
20    caller.memory_write(output_offset, hash.as_slice())?;
21    Ok(())
22}
23
24pub fn syscall_hashing_blake3_impl(data: &[u8]) -> B256 {
25    let mut hasher = blake3::Hasher::default();
26    hasher.update(data);
27    hasher.finalize().as_bytes().into()
28}