0.0.13

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/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/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/sha256/bitify.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 Num2Bits(n) {
     signal input in;

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

@@ -1,3 +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/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

@@ -1,3 +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/>.
+*/
 
 include "sha256compression.circom";
 include "bitify.circom"

circuits/sha256/sha256compression.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/>.
+*/
 
 include "constants.circom";
 include "t1.circom";

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

@@ -1,3 +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 "binsum.circom"
 include "sigma.circom"
 

circuits/sha256/t1.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 "binsum.circom";
 include "sigma.circom";
 include "ch.circom";

circuits/sha256/t2.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 "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 */
@@ -30,10 +30,8 @@ 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")
     .epilogue(`Copyright (C) 2018  0kims association
@@ -43,10 +41,11 @@ const argv = require("yargs")
     repo directory at  https://github.com/iden3/circom `)
     .argv;
 
-const fullFileName = path.resolve(process.cwd(), argv.source);
+const fullFileName = path.resolve(process.cwd(), argv._[0]);
+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");
 }, (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}`);

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "circom",
-  "version": "0.0.7",
+  "version": "0.0.13",
   "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",
+          "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,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "eslint": {
+          "version": "5.7.0",
+          "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.7.0.tgz",
+          "integrity": "sha512-zYCeFQahsxffGl87U2aJ7DPyH8CbWgxBC213Y8+TCanhUTf2gEvfq3EKpHmEcozTLyPmGe9LZdMAwC/CpJBM5A==",
+          "dev": true,
+          "requires": {
+            "@babel/code-frame": "^7.0.0",
+            "ajv": "^6.5.3",
+            "chalk": "^2.1.0",
+            "cross-spawn": "^6.0.5",
+            "debug": "^4.0.1",
+            "doctrine": "^2.1.0",
+            "eslint-scope": "^4.0.0",
+            "eslint-utils": "^1.3.1",
+            "eslint-visitor-keys": "^1.0.0",
+            "espree": "^4.0.0",
+            "esquery": "^1.0.1",
+            "esutils": "^2.0.2",
+            "file-entry-cache": "^2.0.0",
+            "functional-red-black-tree": "^1.0.1",
+            "glob": "^7.1.2",
+            "globals": "^11.7.0",
+            "ignore": "^4.0.6",
+            "imurmurhash": "^0.1.4",
+            "inquirer": "^6.1.0",
+            "is-resolvable": "^1.1.0",
+            "js-yaml": "^3.12.0",
+            "json-stable-stringify-without-jsonify": "^1.0.1",
+            "levn": "^0.3.0",
+            "lodash": "^4.17.5",
+            "minimatch": "^3.0.4",
+            "mkdirp": "^0.5.1",
+            "natural-compare": "^1.4.0",
+            "optionator": "^0.8.2",
+            "path-is-inside": "^1.0.2",
+            "pluralize": "^7.0.0",
+            "progress": "^2.0.0",
+            "regexpp": "^2.0.1",
+            "require-uncached": "^1.0.3",
+            "semver": "^5.5.1",
+            "strip-ansi": "^4.0.0",
+            "strip-json-comments": "^2.0.1",
+            "table": "^5.0.2",
+            "text-table": "^0.2.0"
+          }
+        },
+        "external-editor": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-3.0.3.tgz",
+          "integrity": "sha512-bn71H9+qWoOQKyZDo25mOMVpSmXROAsTJVVVYzrrtol3d4y+AsKjf4Iwl2Q+IuT0kFSQ1qo166UuIwqYq7mGnA==",
+          "dev": true,
+          "requires": {
+            "chardet": "^0.7.0",
+            "iconv-lite": "^0.4.24",
+            "tmp": "^0.0.33"
+          }
+        },
+        "iconv-lite": {
+          "version": "0.4.24",
+          "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
+          "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
+          "dev": true,
+          "requires": {
+            "safer-buffer": ">= 2.1.2 < 3"
+          }
+        },
+        "ignore": {
+          "version": "4.0.6",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-4.0.6.tgz",
+          "integrity": "sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==",
+          "dev": true
+        },
+        "inquirer": {
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/inquirer/-/inquirer-6.2.0.tgz",
+          "integrity": "sha512-QIEQG4YyQ2UYZGDC4srMZ7BjHOmNk1lR2JQj5UknBapklm6WHA+VVH7N+sUdX3A7NeCfGF8o4X1S3Ao7nAcIeg==",
+          "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,
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        },
-        "eslint": {
-          "version": "5.7.0",
-          "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.7.0.tgz",
-          "integrity": "sha512-zYCeFQahsxffGl87U2aJ7DPyH8CbWgxBC213Y8+TCanhUTf2gEvfq3EKpHmEcozTLyPmGe9LZdMAwC/CpJBM5A==",
-          "dev": true,
-          "requires": {
-            "@babel/code-frame": "^7.0.0",
-            "ajv": "^6.5.3",
-            "chalk": "^2.1.0",
-            "cross-spawn": "^6.0.5",
-            "debug": "^4.0.1",
-            "doctrine": "^2.1.0",
-            "eslint-scope": "^4.0.0",
-            "eslint-utils": "^1.3.1",
-            "eslint-visitor-keys": "^1.0.0",
-            "espree": "^4.0.0",
-            "esquery": "^1.0.1",
-            "esutils": "^2.0.2",
-            "file-entry-cache": "^2.0.0",
-            "functional-red-black-tree": "^1.0.1",
-            "glob": "^7.1.2",
-            "globals": "^11.7.0",
-            "ignore": "^4.0.6",
-            "imurmurhash": "^0.1.4",
-            "inquirer": "^6.1.0",
-            "is-resolvable": "^1.1.0",
-            "js-yaml": "^3.12.0",
-            "json-stable-stringify-without-jsonify": "^1.0.1",
-            "levn": "^0.3.0",
-            "lodash": "^4.17.5",
-            "minimatch": "^3.0.4",
-            "mkdirp": "^0.5.1",
-            "natural-compare": "^1.4.0",
-            "optionator": "^0.8.2",
-            "path-is-inside": "^1.0.2",
-            "pluralize": "^7.0.0",
-            "progress": "^2.0.0",
-            "regexpp": "^2.0.1",
-            "require-uncached": "^1.0.3",
-            "semver": "^5.5.1",
-            "strip-ansi": "^4.0.0",
-            "strip-json-comments": "^2.0.1",
-            "table": "^5.0.2",
-            "text-table": "^0.2.0"
-          }
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-        "external-editor": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-3.0.3.tgz",
-          "integrity": "sha512-bn71H9+qWoOQKyZDo25mOMVpSmXROAsTJVVVYzrrtol3d4y+AsKjf4Iwl2Q+IuT0kFSQ1qo166UuIwqYq7mGnA==",
-          "dev": true,
-          "requires": {
-            "chardet": "^0.7.0",
-            "iconv-lite": "^0.4.24",
-            "tmp": "^0.0.33"
-          }
-        },
-        "iconv-lite": {
-          "version": "0.4.24",
-          "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
-          "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
-          "dev": true,
-          "requires": {
-            "safer-buffer": ">= 2.1.2 < 3"
-          }
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-        "ignore": {
-          "version": "4.0.6",
-          "resolved": "https://registry.npmjs.org/ignore/-/ignore-4.0.6.tgz",
-          "integrity": "sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==",
-          "dev": true
-        },
-        "inquirer": {
-          "version": "6.2.0",
-          "resolved": "https://registry.npmjs.org/inquirer/-/inquirer-6.2.0.tgz",
-          "integrity": "sha512-QIEQG4YyQ2UYZGDC4srMZ7BjHOmNk1lR2JQj5UknBapklm6WHA+VVH7N+sUdX3A7NeCfGF8o4X1S3Ao7nAcIeg==",
-          "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"
-          }
-        }
-      }
     }
   }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "circom",
-  "version": "0.0.7",
+  "version": "0.0.13",
   "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": "0.1.4"
   }
 }

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;
@@ -254,11 +254,11 @@ 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 == "&") {
@@ -176,7 +178,7 @@ 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 +388,7 @@ 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 +402,7 @@ 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 +505,14 @@ 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;
@@ -572,8 +578,10 @@ function execIf(ctx, ast) {
         exec(ctx, ast.then);
         if (ctx.error) return;
     } else {
-        exec(ctx, ast.else);
+        if (ast.else) {
-        if (ctx.error) return;
+            exec(ctx, ast.else);
+            if (ctx.error) return;
+        }
     }
 }
 
@@ -746,6 +754,21 @@ 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 == "<<") {
@@ -244,9 +246,13 @@ 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`;
+    }
 }
 
 
@@ -438,6 +444,15 @@ 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;

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/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");
@@ -34,28 +34,28 @@ describe("SHA256 test", () => {
         const cirDef = await compiler(path.join(__dirname, "circuits", "constants_test.circom"));
         assert.equal(cirDef.nVars, 2);
 
-        const circuit = new zkSnark.Circuit(cirDef);
+        const circuit = new snarkjs.Circuit(cirDef);
 
         const witness = circuit.calculateWitness({ "in": "0xd807aa98" });
 
-        assert(witness[0].equals(zkSnark.bigInt(1)));
+        assert(witness[0].equals(snarkjs.bigInt(1)));
-        assert(witness[1].equals(zkSnark.bigInt("0xd807aa98")));
+        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 zkSnark.Circuit(cirDef);
+        const circuit = new snarkjs.Circuit(cirDef);
 
         const witness = circuit.calculateWitness({ "a": "111", "b": "222" });
 
-        assert(witness[0].equals(zkSnark.bigInt(1)));
+        assert(witness[0].equals(snarkjs.bigInt(1)));
-        assert(witness[1].equals(zkSnark.bigInt("333")));
+        assert(witness[1].equals(snarkjs.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 +75,7 @@ describe("SHA256 test", () => {
 
         assert.equal(hash, hash2);
 
-        assert(witness[1].equals(zkSnark.bigInt(r)));
+        assert(witness[1].equals(snarkjs.bigInt(r)));
     }).timeout(1000000);