Fix a bug when template and main component were separated

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@solarity/zktype",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Unleash TypeScript bindings for Circom circuits",
   "main": "dist/src/index.js",
   "types": "dist/src/index.d.ts",

src/constants/circom.ts

@@ -9,6 +9,7 @@ export enum SignalVisibilityNames {
   Private = "private",
 }
 
+// FIXME: Array could have any number of dimensions (e.g. bigint[2][3][4]...)
 export enum InternalType {
   BigInt = "bigint",
   BigIntArray = "bigint[]",

src/core/CircuitASTGenerator.ts

@@ -173,6 +173,8 @@ export default class CircuitASTGenerator {
 
   /**
    * Returns an instance of the CircomRunner with the specified arguments.
+   *
+   * FIXME: explain error handling
    */
   private _getCircomRunner(args: string[], quiet: boolean = false): any {
     return new CircomRunner({

src/core/CircuitArtifactGenerator.ts

@@ -20,6 +20,7 @@ import {
   CircomCompilerOutput,
   CircuitProcessorConfig,
   CircuitArtifactGeneratorConfig,
+  Template,
 } from "../types";
 
 /**
@@ -130,7 +131,9 @@ export default class CircuitArtifactGenerator {
       signals: [],
     };
 
-    for (const statement of ast.circomCompilerOutput[0].definitions[0].Template!.body.Block.stmts) {
+    const template = this._findTemplateForCircuit(ast.circomCompilerOutput, circuitArtifact.circuitName);
+
+    for (const statement of template.body.Block.stmts) {
       if (
         !statement.InitializationBlock ||
         !this._validateInitializationBlock(ast.sourcePath, statement.InitializationBlock) ||
@@ -221,6 +224,33 @@ export default class CircuitArtifactGenerator {
     return SignalVisibilityNames.Private;
   }
 
+  /**
+   * Finds the template for the circuit based on the circuit name.
+   *
+   * @param {CircomCompilerOutput[]} compilerOutputs - The compiler outputs of the circuit.
+   * @param {string} circuitName - The name of the circuit.
+   * @returns {Template} The template for the circuit.
+   */
+  private _findTemplateForCircuit(compilerOutputs: CircomCompilerOutput[], circuitName: string): Template {
+    for (const compilerOutput of compilerOutputs) {
+      if (
+        !compilerOutput.definitions ||
+        compilerOutput.definitions.length < 1 ||
+        !compilerOutput.definitions[0].Template
+      ) {
+        continue;
+      }
+
+      const template = compilerOutput.definitions[0].Template;
+
+      if (template.name === circuitName) {
+        return template;
+      }
+    }
+
+    throw new Error(`The template for the circuit ${circuitName} could not be found.`);
+  }
+
   /**
    * Validates the AST of a circuit to ensure it meets the expected structure.
    *
@@ -245,15 +275,6 @@ export default class CircuitArtifactGenerator {
     if (!ast.circomCompilerOutput[0].main_component[1].Call.id) {
       throw new Error(`The main component id is missing in the circuit AST: ${ast.sourcePath}`);
     }
-
-    if (
-      !ast.circomCompilerOutput[0].definitions[0].Template ||
-      !ast.circomCompilerOutput[0].definitions[0].Template.body ||
-      !ast.circomCompilerOutput[0].definitions[0].Template.body.Block ||
-      !ast.circomCompilerOutput[0].definitions[0].Template.body.Block.stmts
-    ) {
-      throw new Error(`The template is missing or incomplete in the circuit AST: ${ast.sourcePath}`);
-    }
   }
 
   /**

test/CircuitASTGenerator.test.ts

@@ -11,7 +11,7 @@ describe("Circuit AST Generation", function () {
   test("it should compile the basic circuit", async function () {
     compiler.cleanupCircuitASTs();
 
-    const pathToCircuit = require.resolve("./fixture/credentialAtomicQueryMTPOnChainVoting.circom");
+    const pathToCircuit = require.resolve("./fixture/credentialAtomicQueryMTPV2OnChainVoting.circom");
 
     await compiler.generateCircuitAST(pathToCircuit);
 
@@ -20,7 +20,7 @@ describe("Circuit AST Generation", function () {
         path.join(
           compiler.projectRoot,
           CircuitASTGenerator.TEMP_DIR,
-          "fixture/credentialAtomicQueryMTPOnChainVoting.json",
+          "fixture/credentialAtomicQueryMTPV2OnChainVoting.json",
         ),
       ),
     ).toBe(true);

test/CircuitArtifactGenerator.test.ts

@@ -12,7 +12,7 @@ import { defaultCircuitArtifactGeneratorConfig, defaultCircuitProcessorConfig }
 describe("Circuit Artifact Generation", function () {
   const expectedGeneratedArtifacts = [
     "Basic.json",
-    "credentialAtomicQueryMTPOnChainVoting.json",
+    "credentialAtomicQueryMTPV2OnChainVoting.json",
     "lib/BasicInLib.json",
     "auth/BasicInAuth.json",
   ];
@@ -87,7 +87,7 @@ describe("Circuit Artifact Generation", function () {
     fs.cpSync("test/mocks/InvalidTemplateBlock.json", `${CircuitASTGenerator.TEMP_DIR}/InvalidTemplateBlock.json`);
 
     expect(artifactGenerator.generateCircuitArtifacts()).rejects.toThrow(
-      "The template is missing or incomplete in the circuit AST: test/fixture/InvalidTemplateBlock.circom",
+      "The template for the circuit Multiplier2 could not be found.",
     );
   });
 

test/CircuitProcessor.test.ts

@@ -13,7 +13,7 @@ import { defaultCircuitProcessorConfig } from "../src/config";
 describe("Circuit Processor", function () {
   const validCircuitPaths = [
     "fixture/Basic.circom",
-    "fixture/credentialAtomicQueryMTPOnChainVoting.circom",
+    "fixture/credentialAtomicQueryMTPV2OnChainVoting.circom",
     "fixture/lib/BasicInLib.circom",
     "fixture/auth/BasicInAuth.circom",
   ];

test/fixture/Basic.circom

@@ -1,10 +1,5 @@
 pragma circom 2.1.8;
 
-template Multiplier2() {
-   //Declaration of signals
-   signal input in1;
-   signal input in2;
-   signal output out <== in1 * in2;
-}
+include "./data/Basic.circom";
 
 component main {public [in1,in2]} = Multiplier2();

test/fixture/credentialAtomicQueryMTPV2OnChainVoting.circom

@@ -0,0 +1,14 @@
+pragma circom 2.0.0;
+
+include "./data/credentialAtomicQueryMTPOnChainVoting.circom";
+
+component main{public [requestID,
+                       issuerID,
+                       issuerClaimIdenState,
+                       issuerClaimNonRevState,
+                       timestamp,
+                       isRevocationChecked,
+                       challenge,
+                       gistRoot,
+                       votingAddress,
+                       commitment]} = CredentialAtomicQueryMTPOnChainVoting(40, 32, 1, 40, 64);

test/fixture/data/Basic.circom

@@ -0,0 +1,8 @@
+pragma circom 2.1.8;
+
+template Multiplier2() {
+   //Declaration of signals
+   signal input in1;
+   signal input in2;
+   signal output out <== in1 * in2;
+}

test/fixture/credentialAtomicQueryMTPOnChainVoting.circom → test/fixture/data/credentialAtomicQueryMTPOnChainVoting.circom

@@ -1,16 +1,14 @@
 pragma circom 2.0.0;
 
-include "../../node_modules/circomlib/circuits/mux1.circom";
-include "../../node_modules/circomlib/circuits/bitify.circom";
-include "../../node_modules/circomlib/circuits/poseidon.circom";
-include "../../node_modules/circomlib/circuits/comparators.circom";
-
-include "./lib/query/query.circom";
-include "./lib/utils/idUtils.circom";
-include "./lib/utils/spongeHash.circom";
-include "./lib/query/comparators.circom";
-
-include "./auth/authV2.circom";
+include "../../../node_modules/circomlib/circuits/mux1.circom";
+include "../../../node_modules/circomlib/circuits/bitify.circom";
+include "../../../node_modules/circomlib/circuits/comparators.circom";
+include "../../../node_modules/circomlib/circuits/poseidon.circom";
+include "../lib/query/comparators.circom";
+include "../auth/authV2.circom";
+include "../lib/query/query.circom";
+include "../lib/utils/idUtils.circom";
+include "../lib/utils/spongeHash.circom";
 
 /**
 credentialJsonLDAtomicQueryMTP.circom - query claim value and verify claim MTP
@@ -274,14 +272,3 @@ template CredentialAtomicQueryMTPOnChainVoting(issuerLevels, claimLevels, valueA
 
     userID <== auth.userID;
 }
-
-component main{public [requestID,
-                       issuerID,
-                       issuerClaimIdenState,
-                       issuerClaimNonRevState,
-                       timestamp,
-                       isRevocationChecked,
-                       challenge,
-                       gistRoot,
-                       votingAddress,
-                       commitment]} = CredentialAtomicQueryMTPOnChainVoting(40, 32, 1, 40, 64);