types: change output types of poseidon ffi to fix o1js tests

Author: querolita

plonk-napi/src/poseidon.rs

@@ -8,7 +8,7 @@ use wasm_types::{FlatVector, FlatVectorElem};
 // fp
 
 #[napi]
-pub fn caml_pasta_fp_poseidon_block_cipher(state: Uint8Array) -> Result<Vec<u8>> {
+pub fn caml_pasta_fp_poseidon_block_cipher(state: Uint8Array) -> Result<Uint8Array> {
     let mut state_vec: Vec<Fp> = FlatVector::<WasmPastaFp>::from_bytes(state.to_vec())
         .into_iter()
         .map(Into::into)
@@ -19,19 +19,19 @@ pub fn caml_pasta_fp_poseidon_block_cipher(state: Uint8Array) -> Result<Vec<u8>>
         &mut state_vec,
     );
 
-    let res = state_vec
+    let res: Vec<u8> = state_vec
         .into_iter()
         .map(WasmPastaFp)
         .flat_map(FlatVectorElem::flatten)
         .collect();
 
-    Ok(res)
+    Ok(Uint8Array::from(res))
 }
 
 // fq
 
 #[napi]
-pub fn caml_pasta_fq_poseidon_block_cipher(state: Uint8Array) -> Result<Vec<u8>> {
+pub fn caml_pasta_fq_poseidon_block_cipher(state: Uint8Array) -> Result<Uint8Array> {
     let mut state_vec: Vec<Fq> = FlatVector::<WasmPastaFq>::from_bytes(state.to_vec())
         .into_iter()
         .map(Into::into)
@@ -42,11 +42,11 @@ pub fn caml_pasta_fq_poseidon_block_cipher(state: Uint8Array) -> Result<Vec<u8>>
         &mut state_vec,
     );
 
-    let res = state_vec
+    let res: Vec<u8> = state_vec
         .into_iter()
         .map(WasmPastaFq)
         .flat_map(FlatVectorElem::flatten)
         .collect();
 
-    Ok(res)
+    Ok(Uint8Array::from(res))
 }