0.0.19

README.md

@@ -1,4 +1,4 @@
-# Circon
+# Circom
 
 Circon is a language designed to write arithmetic circuits that can be used in zero knowledge proofs.
 

circuits/binsum.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 /*
 
 Binary Sum

circuits/bitify.circom

@@ -0,0 +1,72 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+include "comparators.circom";
+
+
+template Num2Bits(n) {
+    signal input in;
+    signal output out[n];
+    var lc1=0;
+
+    for (var i = 0; i<n; i++) {
+        out[i] <-- (in >> i) & 1;
+        out[i] * (out[i] -1 ) === 0;
+        lc1 += out[i] * 2**i;
+    }
+
+    lc1 === in;
+
+}
+
+template Bits2Num(n) {
+    signal input in[n];
+    signal output out;
+    var lc1=0;
+
+    for (var i = 0; i<n; i++) {
+        lc1 += in[i] * 2**i;
+    }
+
+    lc1 ==> out;
+}
+
+template Num2BitsNeg(n) {
+    signal input in;
+    signal output out[n];
+    var lc1=0;
+
+    component isZero;
+
+    isZero = IsZero();
+
+    var neg = n == 0 ? 0 : 2**n - in;
+
+    for (var i = 0; i<n; i++) {
+        out[i] <-- (neg >> i) & 1;
+        out[i] * (out[i] -1 ) === 0;
+        lc1 += out[i] * 2**i;
+    }
+
+    in ==> isZero.in;
+
+
+
+    lc1 + isZero.out * 2**n === 2**n - in;
+}

circuits/comparators.circom

@@ -0,0 +1,55 @@
+include "bitify.circom";
+include "binsum.circom";
+
+template IsZero() {
+    signal input in;
+    signal output out;
+
+    signal inv;
+
+    inv <-- in!=0 ? 1/in : 0;
+
+    out <== -in*inv +1;
+    in*out === 0;
+}
+
+
+template IsEqual() {
+    signal input in[2];
+    signal output out;
+
+    component isz = IsZero();
+
+    in[1] - in[0] ==> isz.in;
+
+    isz.out ==> out;
+}
+
+
+// N is the number of bits the input  have.
+// The MSF is the sign bit.
+template LessThan(n) {
+    signal input in[2];
+    signal output out;
+
+    component num2Bits0;
+    component num2Bits1;
+
+    component adder;
+
+    adder = BinSum(n, 2);
+
+    num2Bits0 = Num2Bits(n);
+    num2Bits1 = Num2BitsNeg(n);
+
+    in[0] ==> num2Bits0.in;
+    in[1] ==> num2Bits1.in;
+
+    var i;
+    for (i=0;i<n;i++) {
+        num2Bits0.out[i] ==> adder.in[0][i];
+        num2Bits1.out[i] ==> adder.in[1][i];
+    }
+
+    adder.out[n-1] ==> out;
+}

circuits/gates.circom

@@ -1,3 +1,21 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 template XOR() {
     signal input a;

circuits/multiplexer.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 // --> Assignation without constraint
 // <-- Assignation without constraint
 // === Constraint

circuits/sha256/bitify.circom

@@ -1,28 +0,0 @@
-
-
-template Num2Bits(n) {
-    signal input in;
-    signal output out[n];
-    var lc1=0;
-
-    for (var i = 0; i<n; i++) {
-        out[i] <-- (in >> i) & 1;
-        out[i] * (out[i] -1 ) === 0;
-        lc1 += out[i] * 2**i;
-    }
-
-    lc1 === in;
-
-}
-
-template Bits2Num(n) {
-    signal input in[n];
-    signal output out;
-    var lc1=0;
-
-    for (var i = 0; i<n; i++) {
-        lc1 += in[i] * 2**i;
-    }
-
-    lc1 ==> out;
-}

circuits/sha256/ch.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 /* Ch
 
 000 0

circuits/sha256/constants.circom

@@ -1,4 +1,21 @@
+/*
+    Copyright 2018 0KIMS association.
 
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 template H(x) {
     signal output out[32];

circuits/sha256/gates.circom

@@ -1,49 +0,0 @@
-
-template XOR() {
-    signal input a;
-    signal input b;
-    signal output out;
-
-    out <== a + b - 2*a*b;
-}
-
-template AND() {
-    signal input a;
-    signal input b;
-    signal output out;
-
-    out <== a*b;
-}
-
-template OR() {
-    signal input a;
-    signal input b;
-    signal output out;
-
-    out <== a + b - a*b;
-}
-
-template NOT() {
-    signal input in;
-    signal output out;
-
-    out <== 1 + in - 2*in;
-}
-
-template NAND() {
-    signal input a;
-    signal input b;
-    signal output out;
-
-    out <== 1 - a*b;
-}
-
-template NOR() {
-    signal input a;
-    signal input b;
-    signal output out;
-
-    out <== a*b + 1 - a - b;
-}
-
-

circuits/sha256/main.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 include "sha256_2.jaz";
 
 template Main() {

circuits/sha256/maj.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 /* Maj function for sha256
 
 out = a&b ^ a&c ^ b&c  =>

circuits/sha256/rotate.circom

@@ -1,4 +1,21 @@
+/*
+    Copyright 2018 0KIMS association.
 
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 template RotR(n, r) {
     signal input in[n];

circuits/sha256/sha256_2.circom

@@ -1,6 +1,24 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 include "sha256compression.circom";
-include "bitify.circom"
+include "../bitify.circom"
 
 template Sha256_2() {
     signal input a;

circuits/sha256/sha256compression.circom

@@ -1,8 +1,26 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 include "constants.circom";
 include "t1.circom";
 include "t2.circom";
-include "binsum.circom";
+include "../binsum.circom";
 include "sigmaplus.circom";
 
 template Sha256compression() {

circuits/sha256/shift.circom

@@ -1,3 +1,21 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 template ShR(n, r) {
     signal input in[n];

circuits/sha256/sigma.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 include "xor3.circom";
 include "rotate.circom";
 include "shift.circom";

circuits/sha256/sigmaplus.circom

@@ -1,4 +1,23 @@
-include "binsum.circom"
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+include "../binsum.circom"
 include "sigma.circom"
 
 template SigmaPlus() {

circuits/sha256/t1.circom

@@ -1,4 +1,23 @@
-include "binsum.circom";
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+include "../binsum.circom";
 include "sigma.circom";
 include "ch.circom";
 

circuits/sha256/t2.circom

@@ -1,4 +1,23 @@
-include "binsum.circom";
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+include "../binsum.circom";
 include "sigma.circom";
 include "maj.circom"
 

circuits/sha256/xor3.circom

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 /* Xor3 function for sha256
 
 out = a ^ b ^ c  =>

circuits/tobin.circom

@@ -1,4 +1,21 @@
+/*
+    Copyright 2018 0KIMS association.
 
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
 
 
 template toBin(n) {

cli.js

@@ -3,20 +3,20 @@
 /*
     Copyright 2018 0KIMS association.
 
-    This file is part of jaz (Zero Knowledge Circuit Compiler).
+    This file is part of circom (Zero Knowledge Circuit Compiler).
 
-    jaz is a free software: you can redistribute it and/or modify it
+    circom is a free software: you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
-    jaz is distributed in the hope that it will be useful, but WITHOUT
+    circom is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
     License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with jaz. If not, see <https://www.gnu.org/licenses/>.
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
 */
 
 /* eslint-disable no-console */
@@ -30,12 +30,11 @@ const version = require("./package").version;
 
 const argv = require("yargs")
     .version(version)
-    .usage("circom -s [input source circuit file] -o [output definition circuit file]")
+    .usage("circom [input source circuit file] -o [output definition circuit file]")
-    .alias("s", "source")
     .alias("o", "output")
-    .require(["s","o"])
     .help("h")
     .alias("h", "help")
+    .alias("v", "verbose")
     .epilogue(`Copyright (C) 2018  0kims association
     This program comes with ABSOLUTELY NO WARRANTY;
     This is free software, and you are welcome to redistribute it
@@ -43,14 +42,34 @@ const argv = require("yargs")
     repo directory at  https://github.com/iden3/circom `)
     .argv;
 
-const fullFileName = path.resolve(process.cwd(), argv.source);
+
+let inputFile;
+if (argv._.length == 0) {
+    inputFile = "circuit.circom";
+} else if (argv._.length == 1) {
+    inputFile = argv._[0];
+} else  {
+    console.log("Only one circuit at a time is permited");
+    process.exit(1);
+}
+
+const fullFileName = path.resolve(process.cwd(), inputFile);
+const outName = argv.output ?  argv.output : "circuit.json";
 
 compiler(fullFileName).then( (cir) => {
-    fs.writeFileSync(argv.output, JSON.stringify(cir, null, 1), "utf8");
+    fs.writeFileSync(outName, JSON.stringify(cir, null, 1), "utf8");
+    process.exit(0);
 }, (err) => {
-    console.log(err);
+//    console.log(err);
-    console.error(`ERROR at ${err.errFile}:${err.pos.first_line},${err.pos.first_column}-${err.pos.last_line},${err.pos.last_column}   ${err.errStr}`);
+    if (err.pos) {
-    console.error(JSON.stringify(err.ast, null, 1));
+        console.error(`ERROR at ${err.errFile}:${err.pos.first_line},${err.pos.first_column}-${err.pos.last_line},${err.pos.last_column}   ${err.errStr}`);
+    } else {
+        console.log(err.message);
+        if (argv.verbose) console.log(err.stack);
+    }
+    if (err.ast) {
+        console.error(JSON.stringify(err.ast, null, 1));
+    }
     process.exit(1);
 });
 

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "circom",
-  "version": "0.0.7",
+  "version": "0.0.19",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1468,6 +1468,185 @@
         "is-fullwidth-code-point": "^2.0.0"
       }
     },
+    "snarkjs": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/snarkjs/-/snarkjs-0.1.3.tgz",
+      "integrity": "sha512-z5HhuNt019ZzNzUztETK31rpjRRSz3Uzy8TjGgSROf+9ZT9i6dbdWkjTC3fh5o9H+R/2+hcR+7IKAmpIR56V+A==",
+      "dev": true,
+      "requires": {
+        "big-integer": "^1.6.35",
+        "chai": "^4.1.2",
+        "eslint": "^5.3.0",
+        "yargs": "^12.0.2"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.4.tgz",
+          "integrity": "sha512-4Wyjt8+t6YszqaXnLDfMmG/8AlO5Zbcsy3ATHncCzjW/NoPzAId8AK6749Ybjmdt+kUY1gP60fCu46oDxPv/mg==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^2.0.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
+        "big-integer": {
+          "version": "1.6.36",
+          "resolved": "https://registry.npmjs.org/big-integer/-/big-integer-1.6.36.tgz",
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+            "pluralize": "^7.0.0",
+            "progress": "^2.0.0",
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+            "semver": "^5.5.1",
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+            "table": "^5.0.2",
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+          "dev": true,
+          "requires": {
+            "ansi-escapes": "^3.0.0",
+            "chalk": "^2.0.0",
+            "cli-cursor": "^2.1.0",
+            "cli-width": "^2.0.0",
+            "external-editor": "^3.0.0",
+            "figures": "^2.0.0",
+            "lodash": "^4.17.10",
+            "mute-stream": "0.0.7",
+            "run-async": "^2.2.0",
+            "rxjs": "^6.1.0",
+            "string-width": "^2.1.0",
+            "strip-ansi": "^4.0.0",
+            "through": "^2.3.6"
+          }
+        },
+        "ms": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+          "dev": true
+        },
+        "regexpp": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-2.0.1.tgz",
+          "integrity": "sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==",
+          "dev": true
+        },
+        "rxjs": {
+          "version": "6.3.3",
+          "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.3.3.tgz",
+          "integrity": "sha512-JTWmoY9tWCs7zvIk/CvRjhjGaOd+OVBM987mxFo+OW66cGpdKjZcpmc74ES1sB//7Kl/PAe8+wEakuhG4pcgOw==",
+          "dev": true,
+          "requires": {
+            "tslib": "^1.9.0"
+          }
+        },
+        "semver": {
+          "version": "5.6.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
+          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==",
+          "dev": true
+        },
+        "table": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/table/-/table-5.1.0.tgz",
+          "integrity": "sha512-e542in22ZLhD/fOIuXs/8yDZ9W61ltF8daM88rkRNtgTIct+vI2fTnAyu/Db2TCfEcI8i7mjZz6meLq0nW7TYg==",
+          "dev": true,
+          "requires": {
+            "ajv": "^6.5.3",
+            "lodash": "^4.17.10",
+            "slice-ansi": "1.0.0",
+            "string-width": "^2.1.1"
+          }
+        }
+      }
+    },
     "source-map": {
       "version": "0.1.43",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
@@ -1721,184 +1900,6 @@
       "requires": {
         "camelcase": "^4.1.0"
       }
-    },
-    "zksnark": {
-      "version": "0.0.11",
-      "resolved": "https://registry.npmjs.org/zksnark/-/zksnark-0.0.11.tgz",
-      "integrity": "sha512-YIOk93pLvc8NDVvedB0SDM1kGjPTdTYC/sgAvc9Dm6qMSYnS7tzCr844QaUlMApFTldz7D/6xlF1l24ttTGLXw==",
-      "dev": true,
-      "requires": {
-        "big-integer": "^1.6.35",
-        "chai": "^4.1.2",
-        "eslint": "^5.3.0"
-      },
-      "dependencies": {
-        "ajv": {
-          "version": "6.5.4",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.4.tgz",
-          "integrity": "sha512-4Wyjt8+t6YszqaXnLDfMmG/8AlO5Zbcsy3ATHncCzjW/NoPzAId8AK6749Ybjmdt+kUY1gP60fCu46oDxPv/mg==",
-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^2.0.1",
-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.2"
-          }
-        },
-        "big-integer": {
-          "version": "1.6.36",
-          "resolved": "https://registry.npmjs.org/big-integer/-/big-integer-1.6.36.tgz",
-          "integrity": "sha512-t70bfa7HYEA1D9idDbmuv7YbsbVkQ+Hp+8KFSul4aE5e/i1bjCNIRYJZlA8Q8p0r9T8cF/RVvwUgRA//FydEyg==",
-          "dev": true
-        },
-        "chardet": {
-          "version": "0.7.0",
-          "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.7.0.tgz",
-          "integrity": "sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==",
-          "dev": true
-        },
-        "debug": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.0.tgz",
-          "integrity": "sha512-heNPJUJIqC+xB6ayLAMHaIrmN9HKa7aQO8MGqKpvCA+uJYVcvR6l5kgdrhRuwPFHU7P5/A1w0BjByPHwpfTDKg==",
-          "dev": true,
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-        "eslint": {
-          "version": "5.7.0",
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-            "is-resolvable": "^1.1.0",
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-            "levn": "^0.3.0",
-            "lodash": "^4.17.5",
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-            "natural-compare": "^1.4.0",
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-            "mute-stream": "0.0.7",
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-            "strip-ansi": "^4.0.0",
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-          }
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-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-2.0.1.tgz",
-          "integrity": "sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==",
-          "dev": true
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-        "rxjs": {
-          "version": "6.3.3",
-          "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.3.3.tgz",
-          "integrity": "sha512-JTWmoY9tWCs7zvIk/CvRjhjGaOd+OVBM987mxFo+OW66cGpdKjZcpmc74ES1sB//7Kl/PAe8+wEakuhG4pcgOw==",
-          "dev": true,
-          "requires": {
-            "tslib": "^1.9.0"
-          }
-        },
-        "semver": {
-          "version": "5.6.0",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
-          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==",
-          "dev": true
-        },
-        "table": {
-          "version": "5.1.0",
-          "resolved": "https://registry.npmjs.org/table/-/table-5.1.0.tgz",
-          "integrity": "sha512-e542in22ZLhD/fOIuXs/8yDZ9W61ltF8daM88rkRNtgTIct+vI2fTnAyu/Db2TCfEcI8i7mjZz6meLq0nW7TYg==",
-          "dev": true,
-          "requires": {
-            "ajv": "^6.5.3",
-            "lodash": "^4.17.10",
-            "slice-ansi": "1.0.0",
-            "string-width": "^2.1.1"
-          }
-        }
-      }
     }
   }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "circom",
-  "version": "0.0.7",
+  "version": "0.0.19",
   "description": "Language to generate logic circuits",
   "main": "index.js",
   "directories": {
@@ -38,6 +38,6 @@
     "eslint": "^5.0.1",
     "eslint-plugin-mocha": "^5.0.0",
     "jison": "^0.4.18",
-    "zksnark": "0.0.11"
+    "snarkjs": "0.1.5"
   }
 }

parser/jaz.jison

@@ -1,3 +1,22 @@
+/*
+    Copyright 2018 0KIMS association.
+
+    This file is part of circom (Zero Knowledge Circuit Compiler).
+
+    circom is a free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    circom is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+    License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 /* description: Construct AST for jaz language. */
 
 /* lexical grammar */

src/compiler.js

@@ -1,20 +1,20 @@
 /*
     Copyright 2018 0KIMS association.
 
-    This file is part of jaz (Zero Knowledge Circuit Compiler).
+    This file is part of circom (Zero Knowledge Circuit Compiler).
 
-    jaz is a free software: you can redistribute it and/or modify it
+    circom is a free software: you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
-    jaz is distributed in the hope that it will be useful, but WITHOUT
+    circom is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
     License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with jaz. If not, see <https://www.gnu.org/licenses/>.
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
 */
 
 const fs = require("fs");
@@ -31,7 +31,7 @@ module.exports = compile;
 
 const parser = require("../parser/jaz.js").parser;
 
-const timeout = ms => new Promise(res => setTimeout(res, ms))
+const timeout = ms => new Promise(res => setTimeout(res, ms));
 
 async function compile(srcFile) {
     const fullFileName = srcFile;
@@ -62,8 +62,13 @@ async function compile(srcFile) {
         fileName: fullFileName
     };
 
+
     exec(ctx, ast);
 
+    if (!ctx.components["main"]) {
+        throw new Error("A main component must be defined");
+    }
+
     classifySignals(ctx);
     reduceConstants(ctx);
 
@@ -254,11 +259,11 @@ function reduceConstrains(ctx) {
                     }
                 }
 
-                for (let j=0; j<ctx.constraints.length; j++ ) {
+                for (let j=0; j<newConstraints.length; j++) {
-                    const c2 = ctx.constraints[j];
+                    newConstraints[j] = lc.substitute(newConstraints[j], isolatedSignal, isolatedSignalEquivalence);
-                    if (i!=j) {
+                }
-                        lc.substitute(c2, isolatedSignal, isolatedSignalEquivalence);
+                for (let j=i+1; j<ctx.constraints.length; j++ ) {
-                    }
+                    ctx.constraints[j] = lc.substitute(ctx.constraints[j], isolatedSignal, isolatedSignalEquivalence);
                 }
                 c.a={ type: "LINEARCOMBINATION", values: {} };
                 c.b={ type: "LINEARCOMBINATION", values: {} };

src/exec.js

@@ -1,20 +1,20 @@
 /*
     Copyright 2018 0KIMS association.
 
-    This file is part of jaz (Zero Knowledge Circuit Compiler).
+    This file is part of circom (Zero Knowledge Circuit Compiler).
 
-    jaz is a free software: you can redistribute it and/or modify it
+    circom is a free software: you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
-    jaz is distributed in the hope that it will be useful, but WITHOUT
+    circom is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
     License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with jaz. If not, see <https://www.gnu.org/licenses/>.
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
 */
 
 const path = require("path");
@@ -78,6 +78,8 @@ function exec(ctx, ast) {
             return execPlusPlusRight(ctx, ast);
         } else if (ast.op == "PLUSPLUSLEFT") {
             return execPlusPlusLeft(ctx, ast);
+        } else if (ast.op == "/") {
+            return execDiv(ctx, ast);
         } else if (ast.op == "**") {
             return execExp(ctx, ast);
         } else if (ast.op == "&") {
@@ -96,6 +98,8 @@ function exec(ctx, ast) {
             return execGte(ctx, ast);
         } else if (ast.op == "==") {
             return execEq(ctx, ast);
+        } else if (ast.op == "!=") {
+            return execNeq(ctx, ast);
         } else if (ast.op == "?") {
             return execTerCon(ctx, ast);
         } else {
@@ -176,7 +180,7 @@ function setScope(ctx, name, selectors, value) {
 
     function setScopeArray(a, sels) {
         if (sels.length == 1) {
-            a[sels[0]] = value;
+            a[sels[0].value] = value;
         } else {
             setScopeArray(a[sels[0]], sels.slice(1));
         }
@@ -386,8 +390,7 @@ function execFunctionCall(ctx, ast) {
         const v = exec(ctx, ast.params[i]);
         if (ctx.error) return;
 
-        if (v.type != "NUMBER") return error(ctx, ast.params[i], "expected a number");
+        paramValues.push(v);
-        paramValues.push( v.value);
     }
 
     if (ast.params.length != paramValues.length) error(ctx, ast, "Invalid Number of parameters");
@@ -401,10 +404,7 @@ function execFunctionCall(ctx, ast) {
 
     const scope = {};
     for (let i=0; i< fnc.params.length; i++) {
-        scope[fnc.params[i]] = {
+        scope[fnc.params[i]] = paramValues[i];
-            type: "NUMBER",
-            value: paramValues[i]
-        };
     }
 
     ctx.fileName = fnc.fileName;
@@ -507,6 +507,14 @@ function execVariable(ctx, ast) {
     if (ctx.error) return;
 
     if (!v) return error(ctx, ast, "Variable not defined");
+
+    // If the signal has an assigned value (constant) just return the constant
+    if ((v.type == "SIGNAL") && (ctx.signals[v.fullName].value)) {
+        return {
+            type: "NUMBER",
+            value: ctx.signals[v.fullName].value
+        };
+    }
     let res;
     res=v;
     return res;
@@ -539,15 +547,17 @@ function execFor(ctx, ast) {
     let v = exec(ctx, ast.condition);
     if (ctx.error) return;
 
-    while ((v.value.neq(0))&&(!ctx.returnValue)) {
+    if (typeof v.value != "undefined") {
-        exec(ctx, ast.body);
+        while ((v.value.neq(0))&&(!ctx.returnValue)) {
-        if (ctx.error) return;
+            exec(ctx, ast.body);
+            if (ctx.error) return;
 
-        exec(ctx, ast.step);
+            exec(ctx, ast.step);
-        if (ctx.error) return;
+            if (ctx.error) return;
 
-        v = exec(ctx, ast.condition);
+            v = exec(ctx, ast.condition);
-        if (ctx.error) return;
+            if (ctx.error) return;
+        }
     }
 }
 
@@ -555,12 +565,14 @@ function execWhile(ctx, ast) {
     let v = exec(ctx, ast.condition);
     if (ctx.error) return;
 
-    while ((v.value.neq(0))&&(!ctx.returnValue)) {
+    if (typeof v.value != "undefined") {
-        exec(ctx, ast.body);
+        while ((v.value.neq(0))&&(!ctx.returnValue)) {
-        if (ctx.error) return;
+            exec(ctx, ast.body);
+            if (ctx.error) return;
 
-        v = exec(ctx, ast.condition);
+            v = exec(ctx, ast.condition);
-        if (ctx.error) return;
+            if (ctx.error) return;
+        }
     }
 }
 
@@ -568,12 +580,16 @@ function execIf(ctx, ast) {
     let v = exec(ctx, ast.condition);
     if (ctx.error) return;
 
-    if ((v.value.neq(0))&&(!ctx.returnValue)) {
+    if (typeof v.value != "undefined") {
-        exec(ctx, ast.then);
+        if ((v.value.neq(0))&&(!ctx.returnValue)) {
-        if (ctx.error) return;
+            exec(ctx, ast.then);
-    } else {
+            if (ctx.error) return;
-        exec(ctx, ast.else);
+        } else {
-        if (ctx.error) return;
+            if (ast.else) {
+                exec(ctx, ast.else);
+                if (ctx.error) return;
+            }
+        }
     }
 }
 
@@ -672,6 +688,20 @@ function execEq(ctx, ast) {
     };
 }
 
+function execNeq(ctx, ast) {
+    const a = exec(ctx, ast.values[0]);
+    if (ctx.error) return;
+    if (a.type != "NUMBER") return { type: "NUMBER" };
+    const b = exec(ctx, ast.values[1]);
+    if (ctx.error) return;
+    if (b.type != "NUMBER") return { type: "NUMBER" };
+    if (!a.value || !b.value) return { type: "NUMBER" };
+    return {
+        type: "NUMBER",
+        value: a.value.eq(b.value) ? bigInt(0) : bigInt(1)
+    };
+}
+
 
 function execBAnd(ctx, ast) {
     const a = exec(ctx, ast.values[0]);
@@ -746,6 +776,21 @@ function execExp(ctx, ast) {
     };
 }
 
+function execDiv(ctx, ast) {
+    const a = exec(ctx, ast.values[0]);
+    if (ctx.error) return;
+    if (a.type != "NUMBER") return { type: "NUMBER" };
+    const b = exec(ctx, ast.values[1]);
+    if (ctx.error) return;
+    if (b.type != "NUMBER") return { type: "NUMBER" };
+    if (!a.value || !b.value) return { type: "NUMBER" };
+    if (b.value.isZero()) return error(ctx, ast, "Division by zero");
+    return {
+        type: "NUMBER",
+        value: a.value.times(b.value.modInv(__P__)).mod(__P__)
+    };
+}
+
 function execAdd(ctx, ast) {
     const a = exec(ctx, ast.values[0]);
     if (ctx.error) return;

src/gencode.js

@@ -1,20 +1,20 @@
 /*
     Copyright 2018 0KIMS association.
 
-    This file is part of jaz (Zero Knowledge Circuit Compiler).
+    This file is part of circom (Zero Knowledge Circuit Compiler).
 
-    jaz is a free software: you can redistribute it and/or modify it
+    circom is a free software: you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
-    jaz is distributed in the hope that it will be useful, but WITHOUT
+    circom is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
     License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with jaz. If not, see <https://www.gnu.org/licenses/>.
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
 */
 
 const bigInt = require("big-integer");
@@ -65,6 +65,8 @@ function gen(ctx, ast) {
             return genPlusPlusLeft(ctx, ast);
         } else if (ast.op == "**") {
             return genExp(ctx, ast);
+        } else if (ast.op == "/") {
+            return genDiv(ctx, ast);
         } else if (ast.op == "&") {
             return genBAnd(ctx, ast);
         } else if (ast.op == "<<") {
@@ -81,6 +83,8 @@ function gen(ctx, ast) {
             return genGte(ctx, ast);
         } else if (ast.op == "==") {
             return genEq(ctx, ast);
+        } else if (ast.op == "!=") {
+            return genNeq(ctx, ast);
         } else if (ast.op == "?") {
             return genTerCon(ctx, ast);
         } else {
@@ -244,9 +248,13 @@ function genIf(ctx, ast) {
     if (ctx.error) return;
     const thenBody = gen(ctx, ast.then);
     if (ctx.error) return;
-    const elseBody = gen(ctx, ast.else);
+    if (ast.else) {
-    if (ctx.error) return;
+        const elseBody = gen(ctx, ast.else);
-    return `if (${condition}) {\n${thenBody}\n} else {\n${elseBody}\n}\n`;
+        if (ctx.error) return;
+        return `if (${condition}) {\n${thenBody}\n} else {\n${elseBody}\n}\n`;
+    } else {
+        return `if (${condition}) {\n${thenBody}\n}\n`;
+    }
 }
 
 
@@ -308,7 +316,9 @@ function genVariable(ctx, ast) {
         if (ctx.error) return;
     }
 
-
+    if (!v) {
+        return error(ctx, ast, "Invalid left operand");
+    }
     if (v.type == "VARIABLE") {
         return `ctx.getVar("${ast.name}",[${sels.join(",")}])`;
     } else if (v.type == "SIGNAL") {
@@ -438,6 +448,15 @@ function genSub(ctx, ast) {
     return `bigInt(${a}).add(__P__).sub(bigInt(${b})).mod(__P__)`;
 }
 
+function genDiv(ctx, ast) {
+    const a = gen(ctx, ast.values[0]);
+    if (ctx.error) return;
+    const b = gen(ctx, ast.values[1]);
+    if (ctx.error) return;
+
+    return `bigInt(${a}).mul( bigInt(${b}).inverse(__P__) ).mod(__P__)`;
+}
+
 function genExp(ctx, ast) {
     const a = gen(ctx, ast.values[0]);
     if (ctx.error) return;
@@ -515,7 +534,15 @@ function genEq(ctx, ast) {
     if (ctx.error) return;
     const b = gen(ctx, ast.values[1]);
     if (ctx.error) return;
-    return `bigInt(${a}).eq(bigInt(${b})) ? 1 : 0`;
+    return `(bigInt(${a}).eq(bigInt(${b})) ? 1 : 0)`;
+}
+
+function genNeq(ctx, ast) {
+    const a = gen(ctx, ast.values[0]);
+    if (ctx.error) return;
+    const b = gen(ctx, ast.values[1]);
+    if (ctx.error) return;
+    return `(bigInt(${a}).eq(bigInt(${b})) ? 0 : 1)`;
 }
 
 function genUMinus(ctx, ast) {

src/lcalgebra.js

@@ -1,20 +1,20 @@
 /*
     Copyright 2018 0KIMS association.
 
-    This file is part of jaz (Zero Knowledge Circuit Compiler).
+    This file is part of circom (Zero Knowledge Circuit Compiler).
 
-    jaz is a free software: you can redistribute it and/or modify it
+    circom is a free software: you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
-    jaz is distributed in the hope that it will be useful, but WITHOUT
+    circom is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
     License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with jaz. If not, see <https://www.gnu.org/licenses/>.
+    along with circom. If not, see <https://www.gnu.org/licenses/>.
 */
 /*
 
@@ -434,59 +434,73 @@ function toString(a, ctx) {
 
 function canonize(ctx, a) {
     if (a.type == "LINEARCOMBINATION") {
+        const res = clone(a);
         for (let k in a.values) {
             let s = k;
             while (ctx.signals[s].equivalence) s= ctx.signals[s].equivalence;
             if ((typeof(ctx.signals[s].value) != "undefined")&&(k != "one")) {
-                const v = a.values[k].times(ctx.signals[s].value).mod(__P__);
+                const v = res.values[k].times(ctx.signals[s].value).mod(__P__);
-                if (!a.values["one"]) {
+                if (!res.values["one"]) {
-                    a.values["one"]=v;
+                    res.values["one"]=v;
                 } else {
-                    a.values["one"]= a.values["one"].add(v).mod(__P__);
+                    res.values["one"]= res.values["one"].add(v).mod(__P__);
                 }
-                delete a.values[k];
+                delete res.values[k];
             } else if (s != k) {
-                if (!a.values[s]) {
+                if (!res.values[s]) {
-                    a.values[s]=bigInt(a.values[k]);
+                    res.values[s]=bigInt(res.values[k]);
                 } else {
-                    a.values[s]= a.values[s].add(a.values[k]).mod(__P__);
+                    res.values[s]= res.values[s].add(res.values[k]).mod(__P__);
                 }
-                delete a.values[k];
+                delete res.values[k];
             }
         }
-        for (let k in a.values) {
+        for (let k in res.values) {
-            if (a.values[k].isZero()) delete a.values[k];
+            if (res.values[k].isZero()) delete res.values[k];
         }
-        return a;
+        return res;
     } else if (a.type == "QEQ") {
-        a.a = canonize(ctx, a.a);
+        const res = {
-        a.b = canonize(ctx, a.b);
+            type: "QEQ",
-        a.c = canonize(ctx, a.c);
+            a: canonize(ctx, a.a),
+            b: canonize(ctx, a.b),
+            c: canonize(ctx, a.c)
+        };
+        return res;
+    } else {
+        return a;
     }
-    return a;
 }
 
 function substitute(where, signal, equivalence) {
     if (equivalence.type != "LINEARCOMBINATION") throw new Error("Equivalence must be a Linear Combination");
     if (where.type == "LINEARCOMBINATION") {
         if (!where.values[signal] || where.values[signal].isZero()) return where;
-        const coef = where.values[signal];
+        const res=clone(where);
+        const coef = res.values[signal];
         for (let k in equivalence.values) {
             if (k != signal) {
                 const v = coef.times(equivalence.values[k]).mod(__P__);
-                if (!where.values[k]) {
+                if (!res.values[k]) {
-                    where.values[k]=v;
+                    res.values[k]=v;
                 } else {
-                    where.values[k]= where.values[k].add(v).mod(__P__);
+                    res.values[k]= res.values[k].add(v).mod(__P__);
                 }
-                if (where.values[k].isZero()) delete where.values[k];
+                if (res.values[k].isZero()) delete res.values[k];
             }
         }
-        delete where.values[signal];
+        delete res.values[signal];
+        return res;
     } else if (where.type == "QEQ") {
-        substitute(where.a, signal, equivalence);
+        const res = {
-        substitute(where.b, signal, equivalence);
+            type: "QEQ",
-        substitute(where.c, signal, equivalence);
+            a: substitute(where.a, signal, equivalence),
+            b: substitute(where.b, signal, equivalence),
+            c: substitute(where.c, signal, equivalence)
+        };
+        return res;
+    } else {
+        return where;
     }
 }
 

test/cases.js

@@ -0,0 +1,14 @@
+const chai = require("chai");
+const path = require("path");
+const snarkjs = require("snarkjs");
+const crypto = require("crypto");
+
+const compiler = require("../index.js");
+
+const assert = chai.assert;
+
+describe("Sum test", () => {
+    it("Should compile a code with an undefined if", async() => {
+        await compiler(path.join(__dirname, "circuits", "undefinedif.circom"));
+    });
+});

test/circuits/isequal.circom

@@ -0,0 +1,4 @@
+
+include "../../circuits/comparators.circom";
+
+component main = IsEqual();

test/circuits/iszero.circom

@@ -0,0 +1,5 @@
+
+
+include "../../circuits/comparators.circom";
+
+component main = IsZero();

test/circuits/lessthan.circom

@@ -0,0 +1,4 @@
+
+include "../../circuits/comparators.circom";
+
+component main = LessThan(32);

test/circuits/sum_test.circom

@@ -1,5 +1,5 @@
-include "../../circuits/sha256/bitify.circom"
+include "../../circuits/bitify.circom"
-include "../../circuits/sha256/binsum.circom"
+include "../../circuits/binsum.circom"
 
 template A() {
     signal private input a;

test/circuits/undefinedif.circom

@@ -0,0 +1,14 @@
+template X() {
+    signal input i;
+    signal input j;
+    signal output out;
+
+    if (i == 0) {
+        out <-- i;
+    }
+    else {
+        out <-- j;
+    }
+}
+
+component main = X();

test/comparators.js

@@ -0,0 +1,77 @@
+const chai = require("chai");
+const path = require("path");
+const snarkjs = require("snarkjs");
+const crypto = require("crypto");
+
+const compiler = require("../index.js");
+
+const assert = chai.assert;
+
+describe("Sum test", () => {
+    it("Should create a iszero circuit", async() => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "iszero.circom"));
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        let witness;
+        witness = circuit.calculateWitness({ "in": 111});
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in": 0 });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+    });
+    it("Should create a isequal circuit", async() => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "isequal.circom"));
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        let witness;
+        witness = circuit.calculateWitness({ "in[0]": "111", "in[1]": "222" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "444", "in[1]": "444" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+    });
+    it("Should create a comparison", async() => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "lessthan.circom"));
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        let witness;
+        witness = circuit.calculateWitness({ "in[0]": "333", "in[1]": "444" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "1", "in[1]": "1" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "661", "in[1]": "660" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "1" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "444" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "1", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "555", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+    });
+});

test/helpers/printsignal.js

@@ -0,0 +1,22 @@
+
+const snarkjs = require("snarkjs");
+
+const bigInt = snarkjs.bigInt;
+
+module.exports = function hexBits(cir, witness, sig, nBits) {
+    let v = bigInt(0);
+    for (let i=nBits-1; i>=0; i--) {
+        v = v.shiftLeft(1);
+        const name = sig+"["+i+"]";
+        const idx = cir.getSignalIdx(name);
+        const vbit = bigInt(witness[idx].toString());
+        if (vbit.equals(bigInt(1))) {
+            v = v.add(bigInt(1));
+        } else if (vbit.equals(bigInt(0))) {
+            v;
+        } else {
+            console.log("Not Binary: "+name);
+        }
+    }
+    return v.toString(16);
+};

test/input_sum_test.json

@@ -1,4 +0,0 @@
-{
-    "a": "111",
-    "b": "222"
-}

test/sha256.js

@@ -1,6 +1,6 @@
 const chai = require("chai");
 const path = require("path");
-const zkSnark = require("zksnark");
+const snarkjs = require("snarkjs");
 const crypto = require("crypto");
 
 const compiler = require("../index.js");
@@ -8,54 +8,14 @@ const compiler = require("../index.js");
 const assert = chai.assert;
 
 const sha256 = require("./helpers/sha256");
-const bigInt = require("big-integer");
 
-function hexBits(cir, witness, sig, nBits) {
+// const printSignal = require("./helpers/printsignal");
-    let v = bigInt(0);
+
-    for (let i=nBits-1; i>=0; i--) {
-        v = v.shiftLeft(1);
-        const name = sig+"["+i+"]";
-        const idx = cir.getSignalIdx(name);
-        const vbit = bigInt(witness[idx].toString());
-        if (vbit.equals(bigInt(1))) {
-            v = v.add(bigInt(1));
-        } else if (vbit.equals(bigInt(0))) {
-            v;
-        } else {
-            console.log("Not Binary: "+name);
-        }
-    }
-    return v.toString(16);
-}
 
 describe("SHA256 test", () => {
-    it("Should create a constant circuit", async () => {
-
-        const cirDef = await compiler(path.join(__dirname, "circuits", "constants_test.circom"));
-        assert.equal(cirDef.nVars, 2);
-
-        const circuit = new zkSnark.Circuit(cirDef);
-
-        const witness = circuit.calculateWitness({ "in": "0xd807aa98" });
-
-        assert(witness[0].equals(zkSnark.bigInt(1)));
-        assert(witness[1].equals(zkSnark.bigInt("0xd807aa98")));
-    });
-    it("Should create a sum circuit", async () => {
-
-        const cirDef = await compiler(path.join(__dirname, "circuits", "sum_test.circom"));
-        assert.equal(cirDef.nVars, 101);
-
-        const circuit = new zkSnark.Circuit(cirDef);
-
-        const witness = circuit.calculateWitness({ "a": "111", "b": "222" });
-
-        assert(witness[0].equals(zkSnark.bigInt(1)));
-        assert(witness[1].equals(zkSnark.bigInt("333")));
-    });
     it("Should calculate a hash", async () => {
         const cirDef = await compiler(path.join(__dirname, "circuits", "sha256_2_test.circom"));
-        const circuit = new zkSnark.Circuit(cirDef);
+        const circuit = new snarkjs.Circuit(cirDef);
 
         console.log("Vars: "+circuit.nVars);
         console.log("Constraints: "+circuit.nConstraints);
@@ -75,7 +35,7 @@ describe("SHA256 test", () => {
 
         assert.equal(hash, hash2);
 
-        assert(witness[1].equals(zkSnark.bigInt(r)));
+        assert(witness[1].equals(snarkjs.bigInt(r)));
     }).timeout(1000000);
 
 

test/sum.js

@@ -0,0 +1,35 @@
+const chai = require("chai");
+const path = require("path");
+const snarkjs = require("snarkjs");
+const crypto = require("crypto");
+
+const compiler = require("../index.js");
+
+const assert = chai.assert;
+
+describe("Sum test", () => {
+    it("Should create a constant circuit", async () => {
+
+        const cirDef = await compiler(path.join(__dirname, "circuits", "constants_test.circom"));
+        assert.equal(cirDef.nVars, 2);
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        const witness = circuit.calculateWitness({ "in": "0xd807aa98" });
+
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt("0xd807aa98")));
+    });
+    it("Should create a sum circuit", async () => {
+
+        const cirDef = await compiler(path.join(__dirname, "circuits", "sum_test.circom"));
+        assert.equal(cirDef.nVars, 101);
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        const witness = circuit.calculateWitness({ "a": "111", "b": "222" });
+
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt("333")));
+    });
+});