feat: ensuring sandbox/aztec.js errors are clear

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

@@ -78,13 +78,13 @@ export async function acvm(
       logger(`Oracle callback ${name}`);
       const oracleFunction = callback[name as ORACLE_NAMES];
       if (!oracleFunction) {
-        throw new Error(`Callback ${name} not found`);
+        throw new Error(`Oracle callback ${name} not found`);
       }
 
       const result = await oracleFunction.call(callback, ...args);
       return [result];
     } catch (err: any) {
-      logger(`Error in ACVM callback ${name}: ${err.message ?? err ?? 'Unknown'}`);
+      logger(`Error in oracle callback ${name}: ${err.message ?? err ?? 'Unknown'}`);
       throw err;
     }
   });

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

@@ -47,4 +47,16 @@ describe('AztecRpcServer', function () {
 
     await expect(rpcServer.addAccount(privateKey, address, partialAddress)).rejects.toThrowError(/cannot be derived/);
   });
+
+  it('cannot add the same account twice', async () => {
+    const keyPair = ConstantKeyPair.random(await Grumpkin.new());
+    const pubKey = keyPair.getPublicKey();
+    const partialAddress = Fr.random();
+    const address = computeContractAddressFromPartial(wasm, pubKey, partialAddress);
+
+    await rpcServer.addAccount(await keyPair.getPrivateKey(), address, partialAddress);
+    await expect(async () =>
+      rpcServer.addAccount(await keyPair.getPrivateKey(), address, partialAddress),
+    ).rejects.toThrow(`Account ${address} already exists`);
+  });
 });

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

@@ -370,12 +370,12 @@ export class AztecRPCServer implements AztecRPC {
   ): Promise<ExecutionRequest> {
     const contract = await this.db.getContract(to);
     if (!contract) {
-      throw new Error('Unknown contract.');
+      throw new Error(`Unknown contract ${to}! Add it to Aztec RPC server by calling server.addContracts(...)`);
     }
 
     const functionDao = contract.functions.find(f => f.name === functionName);
     if (!functionDao) {
-      throw new Error('Unknown function.');
+      throw new Error(`Unknown function ${functionName}.`);
     }
 
     const flatArgs = encodeArguments(functionDao, args);

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

@@ -119,7 +119,13 @@ export class ContractTree {
   public getFunctionAbi(functionSelector: Buffer) {
     const abi = this.contract.functions.find(f => f.selector.equals(functionSelector));
     if (!abi) {
-      throw new Error(`Unknown function: ${functionSelector.toString('hex')}.`);
+      throw new Error(
+        `Unknown function. Selector ${functionSelector.toString(
+          'hex',
+        )} not found in the ABI of contract ${this.contract.address.toString()}. Expected one of: ${this.contract.functions
+          .map(f => f.selector.toString('hex'))
+          .join(', ')}`,
+      );
     }
     return abi;
   }

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

@@ -183,6 +183,9 @@ export class MemoryDB extends MemoryContractDatabase implements Database {
     publicKey: PublicKey,
     partialAddress: PartialContractAddress,
   ): Promise<void> {
+    if (this.publicKeys.has(address.toBigInt())) {
+      throw new Error(`Account ${address} already exists`);
+    }
     this.publicKeys.set(address.toBigInt(), [publicKey, partialAddress]);
     return Promise.resolve();
   }

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

@@ -48,7 +48,10 @@ export class SimulatorOracle implements DBOracle {
    */
   async getPublicKey(address: AztecAddress): Promise<[PublicKey, PartialContractAddress]> {
     const result = await this.db.getPublicKeyAndPartialAddress(address);
-    if (!result) throw new Error(`Unknown public key for address ${address.toString()}`);
+    if (!result)
+      throw new Error(
+        `Unknown public key for address ${address.toString()}. Add public key to Aztec RPC server by calling server.addPublicKeyAndPartialAddress(...)`,
+      );
     return result;
   }
 

yarn-project/aztec.js/src/contract/contract_function_interaction.ts

@@ -44,7 +44,11 @@ export class ContractFunctionInteraction {
     protected contractAddress: AztecAddress,
     protected functionDao: FunctionAbi,
     protected args: any[],
-  ) {}
+  ) {
+    if (args.some(arg => arg === undefined || arg === null)) {
+      throw new Error('All function interaction arguments must be defined and not null. Received: ' + args);
+    }
+  }
 
   /**
    * Create an Aztec transaction instance by combining the transaction request and its signature.

yarn-project/aztec.js/src/contract_deployer/contract_deployer.ts

@@ -6,9 +6,9 @@ import { DeployMethod } from './deploy_method.js';
 
 /**
  * A class for deploying contract.
+ * @remarks Keeping this around even though we have noir contract types because it can be useful for non-TS users.
  */
 export class ContractDeployer {
-  // TODO: remove this?
   constructor(private abi: ContractAbi, private arc: AztecRPC, private publicKey?: PublicKey) {}
 
   /**