feat: initial is_valid eip1271 style wallet + minimal test changes (#…

…1935)

Fixes #1913.

yarn-project/acir-simulator/src/acvm/acvm.ts

@@ -34,6 +34,7 @@ export const ONE_ACVM_FIELD: ACVMField = `0x${'00'.repeat(Fr.SIZE_IN_BYTES - 1)}
 type ORACLE_NAMES =
   | 'computeSelector'
   | 'packArguments'
+  | 'getAuthWitness'
   | 'getSecretKey'
   | 'getNote'
   | 'getNotes'

yarn-project/acir-simulator/src/client/db_oracle.ts

@@ -88,6 +88,13 @@ export interface DBOracle extends CommitmentsDB {
    */
   getCompleteAddress(address: AztecAddress): Promise<CompleteAddress>;
 
+  /**
+   * Retrieve the auth witness for a given message hash.
+   * @param message_hash - The message hash.
+   * @returns A Promise that resolves to an array of field elements representing the auth witness.
+   */
+  getAuthWitness(message_hash: Fr): Promise<Fr[]>;
+
   /**
    * Retrieve the secret key associated with a specific public key.
    * The function only allows access to the secret keys of the transaction creator,

yarn-project/acir-simulator/src/client/private_execution.ts

@@ -80,6 +80,9 @@ export class PrivateFunctionExecution {
       packArguments: async args => {
         return toACVMField(await this.context.packedArgsCache.pack(args.map(fromACVMField)));
       },
+      getAuthWitness: async ([messageHash]) => {
+        return (await this.context.db.getAuthWitness(fromACVMField(messageHash))).map(toACVMField);
+      },
       getSecretKey: ([ownerX], [ownerY]) => this.context.getSecretKey(this.contractAddress, ownerX, ownerY),
       getPublicKey: async ([acvmAddress]) => {
         const address = frToAztecAddress(fromACVMField(acvmAddress));

yarn-project/aztec-rpc/src/aztec_rpc_server/aztec_rpc_server.ts

@@ -76,6 +76,11 @@ export class AztecRPCServer implements AztecRPC {
     this.clientInfo = `${name.split('/')[name.split('/').length - 1]}@${version}`;
   }
 
+  public async addAuthWitness(messageHash: Fr, witness: Fr[]) {
+    await this.db.addAuthWitness(messageHash, witness);
+    return Promise.resolve();
+  }
+
   /**
    * Starts the Aztec RPC server by beginning the synchronisation process between the Aztec node and the database.
    *

yarn-project/aztec-rpc/src/database/database.ts

@@ -10,6 +10,20 @@ import { NoteSpendingInfoDao } from './note_spending_info_dao.js';
  * addresses, storage slots, and nullifiers.
  */
 export interface Database extends ContractDatabase {
+  /**
+   * Add a auth witness to the database.
+   * @param messageHash - The message hash.
+   * @param witness - An array of field elements representing the auth witness.
+   */
+  addAuthWitness(messageHash: Fr, witness: Fr[]): Promise<void>;
+
+  /**
+   * Fetching the auth witness for a given message hash.
+   * @param messageHash - The message hash.
+   * @returns A Promise that resolves to an array of field elements representing the auth witness.
+   */
+  getAuthWitness(messageHash: Fr): Promise<Fr[]>;
+
   /**
    * Get auxiliary transaction data based on contract address and storage slot.
    * It searches for matching NoteSpendingInfoDao objects in the MemoryDB's noteSpendingInfoTable

yarn-project/aztec-rpc/src/database/memory_db.ts

@@ -19,11 +19,31 @@ export class MemoryDB extends MemoryContractDatabase implements Database {
   private treeRoots: Record<MerkleTreeId, Fr> | undefined;
   private globalVariablesHash: Fr | undefined;
   private addresses: CompleteAddress[] = [];
+  private authWitnesses: Record<string, Fr[]> = {};
 
   constructor(logSuffix?: string) {
     super(createDebugLogger(logSuffix ? 'aztec:memory_db_' + logSuffix : 'aztec:memory_db'));
   }
 
+  /**
+   * Add a auth witness to the database.
+   * @param messageHash - The message hash.
+   * @param witness - An array of field elements representing the auth witness.
+   */
+  public addAuthWitness(messageHash: Fr, witness: Fr[]): Promise<void> {
+    this.authWitnesses[messageHash.toString()] = witness;
+    return Promise.resolve();
+  }
+
+  /**
+   * Fetching the auth witness for a given message hash.
+   * @param messageHash - The message hash.
+   * @returns A Promise that resolves to an array of field elements representing the auth witness.
+   */
+  public getAuthWitness(messageHash: Fr): Promise<Fr[]> {
+    return Promise.resolve(this.authWitnesses[messageHash.toString()]);
+  }
+
   public addNoteSpendingInfo(noteSpendingInfoDao: NoteSpendingInfoDao) {
     this.noteSpendingInfoTable.push(noteSpendingInfoDao);
     return Promise.resolve();

yarn-project/aztec-rpc/src/simulator_oracle/index.ts

@@ -46,6 +46,12 @@ export class SimulatorOracle implements DBOracle {
     return completeAddress;
   }
 
+  async getAuthWitness(messageHash: Fr): Promise<Fr[]> {
+    const witness = await this.db.getAuthWitness(messageHash);
+    if (!witness) throw new Error(`Unknown auth witness for message hash ${messageHash.toString()}`);
+    return witness;
+  }
+
   async getNotes(contractAddress: AztecAddress, storageSlot: Fr) {
     const noteDaos = await this.db.getNoteSpendingInfo(contractAddress, storageSlot);
     return noteDaos.map(({ contractAddress, storageSlot, nonce, notePreimage, siloedNullifier, index }) => ({