fixed ptauId calculation for different proving systems

Author: mllwchrry

src/core/setup/SetupProcessor.ts

@@ -11,9 +11,13 @@ import { HardhatZKitError } from "../../errors";
 import { BN128_CURVE_NAME, PTAU_FILE_REG_EXP } from "../../constants";
 import { Reporter } from "../../reporter";
 import { PtauDownloader } from "../utils/PtauDownloader";
-import { terminateCurve } from "../../utils/utils";
-import { getNormalizedFullPath } from "../../utils/path-utils";
-import { getPlonkConstraintsNumber } from "../../utils/constraints-utils";
+
+import {
+  terminateCurve,
+  getNormalizedFullPath,
+  getGroth16ConstraintsNumber,
+  getPlonkConstraintsNumber,
+} from "../../utils";
 
 import { ICircuitArtifacts } from "../../types/artifacts/circuit-artifacts";
 import { CircuitSetupInfo, SetupContributionSettings } from "../../types/core";
@@ -221,15 +225,15 @@ export class SetupProcessor {
       circuitSetupInfoArr.map(async (setupInfo: CircuitSetupInfo) => {
         return usePlonk
           ? getPlonkConstraintsNumber(setupInfo.r1csSourcePath, curve.Fr)
-          : setupInfo.circuitArtifact.baseCircuitInfo.constraintsNumber;
+          : getGroth16ConstraintsNumber(setupInfo.r1csSourcePath);
       }),
     );
 
     await curve.terminate();
 
     const maxConstraintsNumber = Math.max(...circuitsConstraintsNumber);
 
-    const ptauId = Math.max(Math.ceil(Math.log2(maxConstraintsNumber - 1)) + 1, 8);
+    const ptauId = Math.max(Math.floor(Math.log2(maxConstraintsNumber - (usePlonk ? 1 : 0))) + 1, 8);
 
     let entries: fsExtra.Dirent[] = [];
 

src/utils/constraints-utils.ts

@@ -1,15 +1,17 @@
 import * as snarkjs from "snarkjs";
-// @ts-expect-error: No type definitions available for the "r1csfile" package
-import * as r1csfile from "r1csfile";
-// @ts-expect-error: No type definitions available for the "@iden3/binfileutils" package
-import * as binfileutils from "@iden3/binfileutils";
 
 import { LinearCombination, R1CSConstraint } from "../../src/types/utils";
 
 export async function getR1CSConstraintsNumber(r1csFilePath: string): Promise<number> {
   return (await snarkjs.r1cs.info(r1csFilePath)).nConstraints;
 }
 
+export async function getGroth16ConstraintsNumber(r1csFilePath: string): Promise<number> {
+  const r1cs = await snarkjs.r1cs.info(r1csFilePath);
+
+  return r1cs.nConstraints + r1cs.nPubInputs + r1cs.nOutputs;
+}
+
 export async function getPlonkConstraintsNumber(r1csFilePath: string, Fr: any): Promise<number> {
   const normalize = (lc: LinearCombination) => {
     Object.keys(lc).forEach((key) => {
@@ -79,20 +81,11 @@ export async function getPlonkConstraintsNumber(r1csFilePath: string, Fr: any):
     }
   };
 
-  const { fd: fdR1cs, sections: sectionsR1cs } = await binfileutils.readBinFile(
-    r1csFilePath,
-    "r1cs",
-    1,
-    1 << 22,
-    1 << 24,
-  );
-  const r1cs = await r1csfile.readR1csFd(fdR1cs, sectionsR1cs, { loadConstraints: true, loadCustomGates: true });
+  const r1cs = await snarkjs.r1cs.info(r1csFilePath);
 
   let plonkConstraintsCount = r1cs.nOutputs + r1cs.nPubInputs;
 
   r1cs.constraints.forEach((constraint: R1CSConstraint) => process(...constraint));
 
-  await fdR1cs.fd.close();
-
   return plonkConstraintsCount;
 }