fix: avoid decoding public inputs

Author: sirasistant

tooling/noir_js_backend_barretenberg/src/index.ts

@@ -3,7 +3,6 @@ import { decompressSync as gunzip } from 'fflate';
 import { acirToUint8Array } from './serialize.js';
 import { Backend, CompiledCircuit, ProofData } from '@noir-lang/types';
 import { BackendOptions } from './types.js';
-import { deflattenPublicInputs, flattenPublicInputsAsArray } from './public_inputs.js';
 
 export { flattenPublicInputs } from './public_inputs.js';
 
@@ -93,9 +92,8 @@ export class BarretenbergBackend implements Backend {
 
     const splitIndex = proofWithPublicInputs.length - numBytesInProofWithoutPublicInputs;
 
-    const publicInputsConcatenated = proofWithPublicInputs.slice(0, splitIndex);
+    const publicInputs = proofWithPublicInputs.slice(0, splitIndex);
     const proof = proofWithPublicInputs.slice(splitIndex);
-    const publicInputs = deflattenPublicInputs(publicInputsConcatenated, this.acirCircuit.abi);
 
     return { proof, publicInputs };
   }
@@ -181,11 +179,8 @@ export class BarretenbergBackend implements Backend {
 }
 
 function reconstructProofWithPublicInputs(proofData: ProofData): Uint8Array {
-  // Flatten publicInputs
-  const publicInputsConcatenated = flattenPublicInputsAsArray(proofData.publicInputs);
-
   // Concatenate publicInputs and proof
-  const proofWithPublicInputs = Uint8Array.from([...publicInputsConcatenated, ...proofData.proof]);
+  const proofWithPublicInputs = Uint8Array.from([...proofData.publicInputs, ...proofData.proof]);
 
   return proofWithPublicInputs;
 }

tooling/noir_js_types/src/types.ts

@@ -45,7 +45,7 @@ export interface Backend {
  * */
 export type ProofData = {
   /** @description Public inputs of a proof */
-  publicInputs: WitnessMap;
+  publicInputs: Uint8Array;
   /** @description An byte array representing the proof */
   proof: Uint8Array;
 };