ptauId calculation fix

Author: mllwchrry

src/core/compile/CompilationProcessor.ts

@@ -11,8 +11,13 @@ import { HardhatZKitError } from "../../errors";
 import { CIRCUIT_ARTIFACT_VERSION, NODE_MODULES } from "../../constants";
 import { Reporter } from "../../reporter";
 
-import { getGroth16ConstraintsNumber } from "../../utils/constraints-utils";
-import { getNormalizedFullPath, renameFilesRecursively, readDirRecursively } from "../../utils/path-utils";
+import {
+  getNormalizedFullPath,
+  renameFilesRecursively,
+  readDirRecursively,
+  getR1CSConstraintsNumber,
+  terminateCurve,
+} from "../../utils";
 
 import { ZKitConfig } from "../../types/zkit-config";
 import { ArtifactsFileType, CircuitArtifact, ICircuitArtifacts } from "../../types/artifacts/circuit-artifacts";
@@ -104,9 +109,11 @@ export class CompilationProcessor {
 
       for (const info of compilationInfoArr) {
         const r1csFilePath = getNormalizedFullPath(info.tempArtifactsPath, `${info.circuitName}.r1cs`);
-        info.constraintsNumber = await getGroth16ConstraintsNumber(r1csFilePath);
+        info.constraintsNumber = await getR1CSConstraintsNumber(r1csFilePath);
       }
 
+      await terminateCurve();
+
       await this._moveFromTempDirToArtifacts(compilationInfoArr);
 
       await this._emitArtifacts(compilationInfoArr);

src/core/setup/SetupProcessor.ts

@@ -229,7 +229,7 @@ export class SetupProcessor {
 
     const maxConstraintsNumber = Math.max(...circuitsConstraintsNumber);
 
-    const ptauId = Math.max(Math.ceil(Math.log2(maxConstraintsNumber)), 8);
+    const ptauId = Math.max(Math.ceil(Math.log2(maxConstraintsNumber - 1)) + 1, 8);
 
     let entries: fsExtra.Dirent[] = [];
 

src/utils/constraints-utils.ts

@@ -6,7 +6,7 @@ import * as binfileutils from "@iden3/binfileutils";
 
 import { LinearCombination, R1CSConstraint } from "../../src/types/utils";
 
-export async function getGroth16ConstraintsNumber(r1csFilePath: string): Promise<number> {
+export async function getR1CSConstraintsNumber(r1csFilePath: string): Promise<number> {
   return (await snarkjs.r1cs.info(r1csFilePath)).nConstraints;
 }
 
@@ -19,10 +19,13 @@ export async function getPlonkConstraintsNumber(r1csFilePath: string, Fr: any):
 
   const join = (lc1: LinearCombination, k: bigint, lc2: LinearCombination) => {
     const res = { ...lc1 };
+
     Object.keys(lc2).forEach((s) => {
       res[s] = res[s] ? Fr.add(res[s], Fr.mul(k, lc2[s])) : lc2[s];
     });
+
     normalize(res);
+
     return res;
   };
 
@@ -45,12 +48,14 @@ export async function getPlonkConstraintsNumber(r1csFilePath: string, Fr: any):
     let n = 0;
 
     Object.keys(lc).forEach((key) => {
-      if (lc[key] !== 0n) {
-        if (key === "0") {
-          k = Fr.add(k, lc[key]);
-        } else {
-          n++;
-        }
+      if (lc[key] === 0n) {
+        return;
+      }
+
+      if (key === "0") {
+        k = Fr.add(k, lc[key]);
+      } else {
+        n++;
       }
     });