diff --git a/circuits/comparators.circom b/circuits/comparators.circom
index 6ca4d35..3eaa3d8 100644
--- a/circuits/comparators.circom
+++ b/circuits/comparators.circom
@@ -55,7 +55,7 @@ template ForceEqualIfEnabled() {
     (1 - isz.out)*enabled === 0;
 }
 
-
+/*
 // N is the number of bits the input  have.
 // The MSF is the sign bit.
 template LessThan(n) {
@@ -83,3 +83,57 @@ template LessThan(n) {
 
     adder.out[n-1] ==> out;
 }
+*/
+
+template LessThan(n) {
+    signal input in[2];
+    signal output out;
+
+    component n2b = Num2Bits(n*2+1);
+
+    n2b.in <== in[0]+ (1<<n) - in[1];
+
+    out <== 1-n2b.out[n];
+}
+
+
+
+// N is the number of bits the input  have.
+// The MSF is the sign bit.
+template LessEqThan(n) {
+    signal input in[2];
+    signal output out;
+
+    component lt = LessThan(n);
+
+    lt.in[0] <== in[0];
+    lt.in[1] <== in[1]+1;
+    lt.out ==> out;
+}
+
+// N is the number of bits the input  have.
+// The MSF is the sign bit.
+template GreaterThan(n) {
+    signal input in[2];
+    signal output out;
+
+    component lt = LessThan(n);
+
+    lt.in[0] <== in[1];
+    lt.in[1] <== in[0];
+    lt.out ==> out;
+}
+
+// N is the number of bits the input  have.
+// The MSF is the sign bit.
+template GreaterEqThan(n) {
+    signal input in[2];
+    signal output out;
+
+    component lt = LessThan(n);
+
+    lt.in[0] <== in[1];
+    lt.in[1] <== in[0]+1;
+    lt.out ==> out;
+}
+
diff --git a/circuits/eddsaposeidon.circom b/circuits/eddsaposeidon.circom
new file mode 100644
index 0000000..d887247
--- /dev/null
+++ b/circuits/eddsaposeidon.circom
@@ -0,0 +1,122 @@
+/*
+    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 "compconstant.circom";
+include "poseidon.circom";
+include "bitify.circom";
+include "escalarmulany.circom";
+include "escalarmulfix.circom";
+
+template EdDSAPoseidonVerifier() {
+    signal input enabled;
+    signal input Ax;
+    signal input Ay;
+
+    signal input S;
+    signal input R8x;
+    signal input R8y;
+
+    signal input M;
+
+    var i;
+
+// Ensure S<Subgroup Order
+
+    component snum2bits = Num2Bits(253);
+    snum2bits.in <== S;
+
+    component  compConstant = CompConstant(2736030358979909402780800718157159386076813972158567259200215660948447373040);
+
+    for (i=0; i<253; i++) {
+        snum2bits.out[i] ==> compConstant.in[i];
+    }
+    compConstant.in[253] <== 0;
+    compConstant.out === 0;
+
+// Calculate the h = H(R,A, msg)
+
+    component hash = Poseidon(5, 6, 8, 57);
+
+    hash.inputs[0] <== R8x;
+    hash.inputs[1] <== R8y;
+    hash.inputs[2] <== Ax;
+    hash.inputs[3] <== Ay;
+    hash.inputs[4] <== M;
+
+    component h2bits = Num2Bits_strict();
+    h2bits.in <== hash.out;
+
+// Calculate second part of the right side:  right2 = h*8*A
+
+    // Multiply by 8 by adding it 3 times.  This also ensure that the result is in
+    // the subgroup.
+    component dbl1 = BabyDbl();
+    dbl1.x <== Ax;
+    dbl1.y <== Ay;
+    component dbl2 = BabyDbl();
+    dbl2.x <== dbl1.xout;
+    dbl2.y <== dbl1.yout;
+    component dbl3 = BabyDbl();
+    dbl3.x <== dbl2.xout;
+    dbl3.y <== dbl2.yout;
+
+    // We check that A is not zero.
+    component isZero = IsZero();
+    isZero.in <== dbl3.x;
+    isZero.out === 0;
+
+    component mulAny = EscalarMulAny(254);
+    for (i=0; i<254; i++) {
+        mulAny.e[i] <== h2bits.out[i];
+    }
+    mulAny.p[0] <== dbl3.xout;
+    mulAny.p[1] <== dbl3.yout;
+
+
+// Compute the right side: right =  R8 + right2
+
+    component addRight = BabyAdd();
+    addRight.x1 <== R8x;
+    addRight.y1 <== R8y;
+    addRight.x2 <== mulAny.out[0];
+    addRight.y2 <== mulAny.out[1];
+
+// Calculate left side of equation left = S*B8
+
+    var BASE8 = [
+        17777552123799933955779906779655732241715742912184938656739573121738514868268,
+        2626589144620713026669568689430873010625803728049924121243784502389097019475
+    ];
+    component mulFix = EscalarMulFix(253, BASE8);
+    for (i=0; i<253; i++) {
+        mulFix.e[i] <== snum2bits.out[i];
+    }
+
+// Do the comparation left == right if enabled;
+
+    component eqCheckX = ForceEqualIfEnabled();
+    eqCheckX.enabled <== enabled;
+    eqCheckX.in[0] <== mulFix.out[0];
+    eqCheckX.in[1] <== addRight.xout;
+
+    component eqCheckY = ForceEqualIfEnabled();
+    eqCheckY.enabled <== enabled;
+    eqCheckY.in[0] <== mulFix.out[1];
+    eqCheckY.in[1] <== addRight.yout;
+}
diff --git a/circuits/mux1.circom b/circuits/mux1.circom
new file mode 100644
index 0000000..3473c6c
--- /dev/null
+++ b/circuits/mux1.circom
@@ -0,0 +1,47 @@
+/*
+    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 MultiMux1(n) {
+    signal input c[n][2];  // Constants
+    signal input s;   // Selector
+    signal output out[n];
+
+    for (var i=0; i<n; i++) {
+
+        out[i] <== (c[i][1] - c[i][0])*s + c[i][0];
+
+    }
+}
+
+template Mux1() {
+    var i;
+    signal input c[2];  // Constants
+    signal input s;   // Selector
+    signal output out;
+
+    component mux = MultiMux1(1);
+
+    for (i=0; i<2; i++) {
+        mux.c[0][i] <== c[i];
+    }
+
+    s ==> mux.s;
+
+    mux.out[0] ==> out;
+}
diff --git a/circuits/mux2.circom b/circuits/mux2.circom
new file mode 100644
index 0000000..1e71cf7
--- /dev/null
+++ b/circuits/mux2.circom
@@ -0,0 +1,62 @@
+/*
+    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 MultiMux2(n) {
+    signal input c[n][4];  // Constants
+    signal input s[2];   // Selector
+    signal output out[n];
+
+    signal a10[n];
+    signal a1[n];
+    signal a0[n];
+    signal a[n];
+
+    signal  s10;
+    s10 <== s[1] * s[0];
+
+    for (var i=0; i<n; i++) {
+
+          a10[i] <==  ( c[i][ 3]-c[i][ 2]-c[i][ 1]+c[i][ 0] ) * s10;
+           a1[i] <==  ( c[i][ 2]-c[i][ 0] ) * s[1];
+           a0[i] <==  ( c[i][ 1]-c[i][ 0] ) * s[0];
+            a[i] <==  ( c[i][ 0] )
+
+          out[i] <==  (  a10[i] +  a1[i] +  a0[i] +  a[i] );
+
+    }
+}
+
+template Mux2() {
+    var i;
+    signal input c[4];  // Constants
+    signal input s[2];   // Selector
+    signal output out;
+
+    component mux = MultiMux2(1);
+
+    for (i=0; i<4; i++) {
+        mux.c[0][i] <== c[i];
+    }
+
+    for (i=0; i<2; i++) {
+      s[i] ==> mux.s[i];
+    }
+
+    mux.out[0] ==> out;
+}
diff --git a/doc/rollup_tree.monopic b/doc/rollup_tree.monopic
deleted file mode 100644
index 31e5483..0000000
Binary files a/doc/rollup_tree.monopic and /dev/null differ
diff --git a/doc/rollup_tx.monopic b/doc/rollup_tx.monopic
deleted file mode 100644
index 76d5b25..0000000
Binary files a/doc/rollup_tx.monopic and /dev/null differ
diff --git a/package-lock.json b/package-lock.json
index ba65d21..7526ef3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,20 +22,27 @@
         "js-tokens": "^4.0.0"
       }
     },
-    "@types/node": {
-      "version": "10.12.12",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.12.12.tgz",
-      "integrity": "sha512-Pr+6JRiKkfsFvmU/LK68oBRCQeEg36TyAbPhc2xpez24OOZZCuoIhWGTd39VZy6nGafSbxzGouFPTFD/rR1A0A=="
+    "@babel/runtime": {
+      "version": "7.5.1",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.5.1.tgz",
+      "integrity": "sha512-g+hmPKs16iewFSmW57NkH9xpPkuYD1RV3UE2BCkXx9j+nhhRb9hsiSxPmEa67j35IecTQdn4iyMtHMbt5VoREg==",
+      "requires": {
+        "regenerator-runtime": "^0.13.2"
+      }
     },
-    "accepts": {
-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
-      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
+    "@types/bn.js": {
+      "version": "4.11.5",
+      "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.5.tgz",
+      "integrity": "sha512-AEAZcIZga0JgVMHNtl1CprA/hXX7/wPt79AgR4XqaDt7jyj3QWYw6LPoOiznPtugDmlubUnAahMs2PFxGcQrng==",
       "requires": {
-        "mime-types": "~2.1.18",
-        "negotiator": "0.6.1"
+        "@types/node": "*"
       }
     },
+    "@types/node": {
+      "version": "10.14.12",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.12.tgz",
+      "integrity": "sha512-QcAKpaO6nhHLlxWBvpc4WeLrTvPqlHOvaj0s5GriKkA1zq+bsFBPpfYCvQhLqLgYlIko8A9YrPdaMHCo5mBcpg=="
+    },
     "acorn": {
       "version": "6.1.1",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
@@ -51,15 +58,12 @@
       "resolved": "https://registry.npmjs.org/aes-js/-/aes-js-3.0.0.tgz",
       "integrity": "sha1-4h3xCtbCBTKVvLuNq0Cwnb6ofk0="
     },
-    "ajv": {
-      "version": "6.6.1",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.1.tgz",
-      "integrity": "sha512-ZoJjft5B+EJBjUyu9C9Hc0OZyPZSSlOF+plzouTrg6UlA8f+e/n8NIgBFG/9tppJtpPWfthHakK7juJdNDODww==",
+    "ansi-colors": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-1.1.0.tgz",
+      "integrity": "sha512-SFKX67auSNoVR38N3L+nvsPjOE0bybKTYbkf5tRvushrAPQ9V75huw0ZxBkKVeRU9kqH3d6HA4xTckbwZ4ixmA==",
       "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"
+        "ansi-wrap": "^0.1.0"
       }
     },
     "ansi-escapes": {
@@ -67,6 +71,14 @@
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
       "integrity": "sha512-cBhpre4ma+U0T1oM5fXg7Dy1Jw7zzwv7lt/GoCpr+hDQJoYnKVPLL4dCvSEFMmQurOQvSrwT7SL/DAlhBI97RQ=="
     },
+    "ansi-gray": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-gray/-/ansi-gray-0.1.1.tgz",
+      "integrity": "sha1-KWLPVOyXksSFEKPetSRDaGHvclE=",
+      "requires": {
+        "ansi-wrap": "0.1.0"
+      }
+    },
     "ansi-regex": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
@@ -80,10 +92,32 @@
         "color-convert": "^1.9.0"
       }
     },
-    "any-promise": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
+    "ansi-wrap": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/ansi-wrap/-/ansi-wrap-0.1.0.tgz",
+      "integrity": "sha1-qCJQ3bABXponyoLoLqYDu/pF768="
+    },
+    "anymatch": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-2.0.0.tgz",
+      "integrity": "sha512-5teOsQWABXHHBFP9y3skS5P3d/WfWXpv3FUpy+LorMrNYaT9pI4oLMQX7jzQ2KklNpGpWHzdCXTDT2Y3XGlZBw==",
+      "requires": {
+        "micromatch": "^3.1.4",
+        "normalize-path": "^2.1.1"
+      }
+    },
+    "append-buffer": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/append-buffer/-/append-buffer-1.0.2.tgz",
+      "integrity": "sha1-2CIM9GYIFSXv6lBhTz3mUU36WPE=",
+      "requires": {
+        "buffer-equal": "^1.0.0"
+      }
+    },
+    "archy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/archy/-/archy-1.0.0.tgz",
+      "integrity": "sha1-+cjBN1fMHde8N5rHeyxipcKGjEA="
     },
     "argparse": {
       "version": "1.0.10",
@@ -93,80 +127,213 @@
         "sprintf-js": "~1.0.2"
       }
     },
-    "array-flatten": {
-      "version": "1.1.1",
-      "resolved": "http://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    "arr-diff": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA="
     },
-    "asn1": {
-      "version": "0.2.4",
-      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
-      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
+    "arr-filter": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/arr-filter/-/arr-filter-1.1.2.tgz",
+      "integrity": "sha1-Q/3d0JHo7xGqTEXZzcGOLf8XEe4=",
       "requires": {
-        "safer-buffer": "~2.1.0"
+        "make-iterator": "^1.0.0"
       }
     },
-    "asn1.js": {
-      "version": "4.10.1",
-      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
-      "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
+    "arr-flatten": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
+      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg=="
+    },
+    "arr-map": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/arr-map/-/arr-map-2.0.2.tgz",
+      "integrity": "sha1-Onc0X/wc814qkYJWAfnljy4kysQ=",
       "requires": {
-        "bn.js": "^4.0.0",
-        "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0"
+        "make-iterator": "^1.0.0"
+      }
+    },
+    "arr-union": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ="
+    },
+    "array-each": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/array-each/-/array-each-1.0.1.tgz",
+      "integrity": "sha1-p5SvDAWrF1KEbudTofIRoFugxE8="
+    },
+    "array-initial": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/array-initial/-/array-initial-1.1.0.tgz",
+      "integrity": "sha1-L6dLJnOTccOUe9enrcc74zSz15U=",
+      "requires": {
+        "array-slice": "^1.0.0",
+        "is-number": "^4.0.0"
+      },
+      "dependencies": {
+        "is-number": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-4.0.0.tgz",
+          "integrity": "sha512-rSklcAIlf1OmFdyAqbnWTLVelsQ58uvZ66S/ZyawjWqIviTWCjg2PzVGw8WUA+nNuPTqb4wgA+NszrJ+08LlgQ=="
+        }
+      }
+    },
+    "array-last": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/array-last/-/array-last-1.3.0.tgz",
+      "integrity": "sha512-eOCut5rXlI6aCOS7Z7kCplKRKyiFQ6dHFBem4PwlwKeNFk2/XxTrhRh5T9PyaEWGy/NHTZWbY+nsZlNFJu9rYg==",
+      "requires": {
+        "is-number": "^4.0.0"
+      },
+      "dependencies": {
+        "is-number": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-4.0.0.tgz",
+          "integrity": "sha512-rSklcAIlf1OmFdyAqbnWTLVelsQ58uvZ66S/ZyawjWqIviTWCjg2PzVGw8WUA+nNuPTqb4wgA+NszrJ+08LlgQ=="
+        }
       }
     },
-    "assert-plus": {
+    "array-slice": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/array-slice/-/array-slice-1.1.0.tgz",
+      "integrity": "sha512-B1qMD3RBP7O8o0H2KbrXDyB0IccejMF15+87Lvlor12ONPRHP6gTjXMNkt/d3ZuOGbAe66hFmaCfECI24Ufp6w=="
+    },
+    "array-sort": {
       "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+      "resolved": "https://registry.npmjs.org/array-sort/-/array-sort-1.0.0.tgz",
+      "integrity": "sha512-ihLeJkonmdiAsD7vpgN3CRcx2J2S0TiYW+IS/5zHBI7mKUq3ySvBdzzBfD236ubDBQFiiyG3SWCPc+msQ9KoYg==",
+      "requires": {
+        "default-compare": "^1.0.0",
+        "get-value": "^2.0.6",
+        "kind-of": "^5.0.2"
+      },
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         "xhr2-cookies": "1.1.0"
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+      "version": "1.0.0-beta.55",
+      "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.0.0-beta.55.tgz",
+      "integrity": "sha512-ASWqUi8gtWK02Tp8ZtcoAbHenMpQXNvHrakgzvqTNNZn26wgpv+Q4mdPi0KOR6ZgHFL8R/9b5BBoUTglS1WPpg==",
       "requires": {
-        "bn.js": "4.11.6",
-        "eth-lib": "0.1.27",
-        "ethjs-unit": "0.1.6",
+        "@babel/runtime": "^7.3.1",
+        "@types/bn.js": "^4.11.4",
+        "@types/node": "^10.12.18",
+        "bn.js": "4.11.8",
+        "eth-lib": "0.2.8",
+        "ethjs-unit": "^0.1.6",
+        "lodash": "^4.17.11",
         "number-to-bn": "1.7.0",
-        "randomhex": "0.1.5",
-        "underscore": "1.8.3",
+        "randombytes": "^2.1.0",
         "utf8": "2.1.1"
-      },
-      "dependencies": {
-        "bn.js": {
-          "version": "4.11.6",
-          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-          "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
-        }
       }
     },
     "websocket": {
-      "version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
-      "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
+      "version": "1.0.29",
+      "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.29.tgz",
+      "integrity": "sha512-WhU8jKXC8sTh6ocLSqpZRlOKMNYGwUvjA5+XcIgIk/G3JCaDfkZUr0zA19sVSxJ0TEvm0i5IBzr54RZC4vzW7g==",
       "requires": {
         "debug": "^2.2.0",
-        "nan": "^2.3.3",
-        "typedarray-to-buffer": "^3.1.2",
+        "gulp": "^4.0.2",
+        "nan": "^2.11.0",
+        "typedarray-to-buffer": "^3.1.5",
         "yaeti": "^0.0.6"
       },
       "dependencies": {
@@ -10041,16 +5658,6 @@
         "mkdirp": "^0.5.1"
       }
     },
-    "ws": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
-      "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
-      "requires": {
-        "async-limiter": "~1.0.0",
-        "safe-buffer": "~5.1.0",
-        "ultron": "~1.1.0"
-      }
-    },
     "xhr": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
@@ -10139,15 +5746,6 @@
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
       }
-    },
-    "yauzl": {
-      "version": "2.10.0",
-      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
-      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
-      "requires": {
-        "buffer-crc32": "~0.2.3",
-        "fd-slicer": "~1.1.0"
-      }
     }
   }
 }
diff --git a/package.json b/package.json
index 21317bc..9baf38e 100644
--- a/package.json
+++ b/package.json
@@ -27,12 +27,12 @@
     "blake-hash": "^1.1.0",
     "snarkjs": "0.1.11",
     "typedarray-to-buffer": "^3.1.5",
-    "web3": "^1.0.0-beta.36"
+    "web3": "^1.0.0-beta.55"
   },
   "devDependencies": {
     "circom": "0.0.28",
     "eslint-plugin-mocha": "^5.2.0",
-    "ganache-cli": "^6.2.3",
+    "ganache-cli": "^6.4.4",
     "mocha": "^5.2.0"
   }
 }
diff --git a/src/eddsa.js b/src/eddsa.js
index f3079f3..e0e7754 100644
--- a/src/eddsa.js
+++ b/src/eddsa.js
@@ -3,12 +3,15 @@ const bigInt = require("snarkjs").bigInt;
 const babyJub = require("./babyjub");
 const pedersenHash = require("./pedersenHash").hash;
 const mimc7 = require("./mimc7");
+const poseidon = require("./poseidon.js");
 
 exports.prv2pub= prv2pub;
 exports.sign = sign;
 exports.signMiMC = signMiMC;
+exports.signPoseidon = signPoseidon;
 exports.verify = verify;
 exports.verifyMiMC = verifyMiMC;
+exports.verifyPoseidon = verifyPoseidon;
 exports.packSignature = packSignature;
 exports.unpackSignature = unpackSignature;
 exports.pruneBuffer = pruneBuffer;
@@ -69,6 +72,29 @@ function signMiMC(prv, msg) {
     };
 }
 
+
+function signPoseidon(prv, msg) {
+    const h1 = createBlakeHash("blake512").update(prv).digest();
+    const sBuff = pruneBuffer(h1.slice(0,32));
+    const s = bigInt.leBuff2int(sBuff);
+    const A = babyJub.mulPointEscalar(babyJub.Base8, s.shr(3));
+
+    const msgBuff = bigInt.leInt2Buff(msg, 32);
+    const rBuff = createBlakeHash("blake512").update(Buffer.concat([h1.slice(32,64), msgBuff])).digest();
+    let r = bigInt.leBuff2int(rBuff);
+    r = r.mod(babyJub.subOrder);
+    const R8 = babyJub.mulPointEscalar(babyJub.Base8, r);
+
+    const hash = poseidon.createHash(6, 8, 57);
+
+    const hm = hash([R8[0], R8[1], A[0], A[1], msg]);
+    const S = r.add(hm.mul(s)).mod(babyJub.subOrder);
+    return {
+        R8: R8,
+        S: S
+    };
+}
+
 function verify(msg, sig, A) {
     // Check parameters
     if (typeof sig != "object") return false;
@@ -116,6 +142,30 @@ function verifyMiMC(msg, sig, A) {
     return true;
 }
 
+
+function verifyPoseidon(msg, sig, A) {
+    // Check parameters
+    if (typeof sig != "object") return false;
+    if (!Array.isArray(sig.R8)) return false;
+    if (sig.R8.length!= 2) return false;
+    if (!babyJub.inCurve(sig.R8)) return false;
+    if (!Array.isArray(A)) return false;
+    if (A.length!= 2) return false;
+    if (!babyJub.inCurve(A)) return false;
+    if (sig.S>= babyJub.subOrder) return false;
+
+    const hash = poseidon.createHash(6, 8, 57);
+    const hm = hash([sig.R8[0], sig.R8[1], A[0], A[1], msg]);
+
+    const Pleft = babyJub.mulPointEscalar(babyJub.Base8, sig.S);
+    let Pright = babyJub.mulPointEscalar(A, hm.mul(bigInt("8")));
+    Pright = babyJub.addPoint(sig.R8, Pright);
+
+    if (!Pleft[0].equals(Pright[0])) return false;
+    if (!Pleft[1].equals(Pright[1])) return false;
+    return true;
+}
+
 function packSignature(sig) {
     const R8p = babyJub.packPoint(sig.R8);
     const Sp = bigInt.leInt2Buff(sig.S, 32);
diff --git a/src/g2_gencontract.js b/src/g2_gencontract.js
new file mode 100644
index 0000000..9a9d995
--- /dev/null
+++ b/src/g2_gencontract.js
@@ -0,0 +1,583 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+const Contract = require("./evmasm");
+const G2 = require("snarkjs").bn128.G2;
+const bigInt = require("snarkjs").bigInt;
+
+
+function toHex256(a) {
+    let S = a.toString(16);
+    while (S.length < 64) S="0"+S;
+    return "0x" + S;
+}
+
+function createCode(P, w) {
+
+    const C = new Contract();
+
+    const NPOINTS = 1 << (w-1);
+
+    const VAR_POS = C.allocMem(32);
+    const VAR_POINTS = C.allocMem( (NPOINTS)*4*32);
+    const savedP = C.allocMem(32);
+    const savedZ3 = C.allocMem(32);
+
+    // Check selector
+    C.push("0x0100000000000000000000000000000000000000000000000000000000");
+    C.push(0);
+    C.calldataload();
+    C.div();
+    C.push("b65c7c74"); // mulexp(uint256)
+    C.eq();
+    C.jmpi("start");
+    C.invalid();
+
+    C.label("start");
+
+    storeVals();
+
+    C.push( Math.floor(255/w)*w  );                // pos := 255
+    C.push(VAR_POS);
+    C.mstore();
+
+    C.push("21888242871839275222246405745257275088696311157297823662689037894645226208583");
+    C.push(0);
+    C.push(0);
+    C.push(0);
+    C.push(0);
+    C.push(0);
+    C.push(0);
+
+    C.label("begin_loop");      // ACC_X ACC_Y ACC_Z q
+
+    C.internalCall("double");
+
+    // g = (e>>pos)&MASK
+    C.push(4);
+    C.calldataload();           // e ACC_X ACC_Y ACC_Z q
+
+    C.push(VAR_POS);
+    C.mload();                  // pos e ACC_X ACC_Y ACC_Z q
+    C.shr();
+
+    C.push(NPOINTS-1);
+    C.and();                    // g ACC_X ACC_Y ACC_Z q
+
+    C.internalCall("add");      // acc_x acc_y acc_z
+
+    C.push(VAR_POS);
+    C.mload();                  // pos acc_x acc_y acc_z
+    C.dup(0);                   // pos pos acc_x acc_y acc_z
+    C.push(0);                  // 0 pos pos acc_x acc_y acc_z
+    C.eq();                     // eq pos acc_x acc_y acc_z
+    C.jmpi("after_loop");       // pos acc_x acc_y acc_z
+    C.push(w);                  // 5 pos acc_x acc_y acc_z
+    C.sub();                    // pos acc_x acc_y acc_z
+    C.push(VAR_POS);
+    C.mstore();                 // acc_x acc_y acc_z
+    C.jmp("begin_loop");
+    C.label("after_loop");      // pos acc_x acc_y acc_z
+    C.pop();                    // acc_x acc_y acc_z
+
+    C.internalCall("affine");   // acc_x acc_y
+
+    C.push(0);
+    C.mstore();
+    C.push(20);
+    C.mstore();
+    C.push(40);
+    C.mstore();
+    C.push(60);
+    C.mstore();
+
+    C.push("0x80");
+    C.push("0x00");
+    C.return();
+
+
+    double();
+    addPoint();
+    affine();
+
+    return C.createTxData();
+
+    function add(a,b,q) {
+        C.dup(q);
+        C.dup(a+1 + 1);
+        C.dup(b+1 + 2);
+        C.addmod();
+        C.dup(q + 1);
+        C.dup(a + 2);
+        C.dup(b + 3);
+        C.addmod();
+    }
+
+    function sub(a,b,q) {
+        C.dup(q);           // q
+        C.dup(a+1 + 1);     // ai q
+        C.dub(q + 2);       // q ai q
+        C.dup(b+1 + 3);     // bi q ai q
+        C.sub();            // -bi ai q
+        C.addmod();         // ci
+        C.dup(q + 1);       // q ci
+        C.dup(a + 2);       // ar q ci
+        C.dup(q + 3);       // q ar q ci
+        C.dup(b + 4);       // br q ar q ci
+        C.sub();            // -br ar q ci
+        C.addmod();         // cr ci
+    }
+
+    function mul(a, b, q) {
+        C.dup(q);           //  q
+        C.dup(q + 1);       //  q q
+        C.dup(a + 2);       //  ar q q
+        C.dup(b+1 + 3);     //  bi ar q q
+        C.mulmod();         //  ci1 q
+        C.dup(q + 2);       //  q ci1 q
+        C.dup(a+1 + 3);     //  ai q ci1 q
+        C.dup(b + 4);       //  ar ai q ci1 q
+        C.mulmod();         //  ci2 ci1 q
+        C.addmod();         //  ci
+        C.dup(q + 1);       //  q ci
+        C.dup(q + 2);       //  q q ci
+        C.dup(q + 3);       //  q q q ci
+        C.dup(a+1 + 4);     //  ai q q ci
+        C.dup(b+1 + 5);     //  bi ai q q ci
+        C.mulmod();         //  cr2 q q ci
+        C.sub();            //  -cr2 q ci
+        C.dup(q + 3);       //  q -cr2 q ci
+        C.dup(a + 4);       //  ar q -cr2 q ci
+        C.dup(b + 5);       //  br ar q -cr2 q ci
+        C.mulmod();         //  cr1 -cr2 q ci
+        C.addmod();         //  cr ci
+    }
+
+    function square(a, q) {
+        C.dup(q);           //  q
+        C.dup(q + 1);       //  q q
+        C.dup(a + 2);       //  ar q q
+        C.dup(a+1 + 3);     //  ai ar q q
+        C.mulmod();         //  arai q
+        C.dup(0);           //  arai arai q
+        C.addmod();         //  ci
+        C.dup(q + 1);       //  q ci
+        C.dup(q + 2);       //  q q ci
+        C.dup(q + 3);       //  q q q ci
+        C.dup(a+1 + 4);     //  ai q q ci
+        C.dup(a+1 + 5);     //  ai ai q q ci
+        C.mulmod();         //  cr2 q q ci
+        C.sub();            //  -cr2 q ci
+        C.dup(q + 3);       //  q -cr2 q ci
+        C.dup(a + 4);       //  ar q -cr2 q ci
+        C.dup(a + 5);       //  br ar q -cr2 q ci
+        C.mulmod();         //  cr1 -cr2 q ci
+        C.addmod();         //  cr ci
+    }
+
+    function add1(a, q) {
+        C.dup(a+1);         // im
+        C.dup(1 + q);       //  q
+        C.dup(2 + a);       //  re q im
+        C.push(1);          // 1 re q im
+        C.addmod();
+    }
+
+    function cmp(a, b) {
+        C.dup(a);
+        C.dup(b);
+        C.eq();
+        C.dup(a+1);
+        C.dup(a+1);
+        C.and();
+    }
+
+    function rm(a) {
+        if (a>0) C.swap(a);
+        C.pop();
+        if (a>0) C.swap(a);
+        C.pop();
+    }
+
+    function double() {
+        C.label("double");       // xR, xI,    yR, yI,   zR zI, q
+
+        C.dup(4);
+        C.iszero();
+        C.dup(6);
+        C.iszero();
+        C.and();
+        C.jumpi("enddouble");   // X Y Z q
+
+
+        // Z3 = 2*Y*Z // Remove Z
+        mul(2, 4, 6);           // yz X Y Z q
+        rm(6);                  // X Y yz q
+
+        add(4, 4, 6);           // 2yz X Y yz q
+        rm(6);                  // X Y Z3 q
+
+        // A = X^2
+        square(0,6);               // A X Y Z3 q
+
+        // B = Y^2  // Remove Y
+        square(4,8);              // B A X Y Z3 q
+        rm(6);                  // A X B Z3 q
+
+        // C = B^2
+        square(4,8);               // C A X B Z3 q
+
+        // D = (X+B)^2-A-C // Remove X, Remove B
+        add(4,6, 10);           // X+B C A X B Z3 q
+        rm(6);                  // C A X+B B Z3 q
+        rm(6);                  // A X+B C Z3 q
+        square(2,8);            // (X+B)^2 A X+B C Z3 q
+        rm(4);                  // A (X+B)^2 C Z3 q
+        sub(2, 0, 8);           // (X+B)^2-A A (X+B)^2 C Z3 q
+        rm(4);                  // A (X+B)^2-A C Z3 q
+        sub(2, 4, 8);           // (X+B)^2-A-C A (X+B)^2-A C Z3 q
+        rm(4);                  // A D C Z3 q
+
+        // D = D+D
+        add(2,2, 8);            // D+D A D C Z3 q
+        rm(4);                  // A D C Z3 q
+
+        // E=A+A+A
+        add(0, 0, 8);           // 2A A D C Z3 q
+        add(0, 2, 10);          // 3A 2A A D C Z3 q
+        rm(4);                  // 2A 3A D C Z3 q
+        rm(0);                  // E D C Z3 q
+
+        // F=E^2
+        square(0, 8);           // F E D C Z3 q
+
+        // X3= F - 2*D  // Remove F
+        add(4, 4, 10);          // 2D F E D C Z3 q
+        sub(2, 0, 12);          // F-2D 2D F E D C Z3 q
+        rm(4);                  // 2D X3 E D C Z3 q
+        rm(0);                  // X3 E D C Z3 q
+
+        // Y3 = E * (D - X3) - 8 * C  // Remove D C  E
+
+        sub(4, 0, 10);          // D-X3 X3 E D C Z3 q
+        rm(6);                  // X3 E D-X3 C Z3 q
+        mul(2, 4, 10);          // E*(D-X3) X3 E D-X3 C Z3 q
+        rm(6);                  // X3 E E*(D-X3) C Z3 q
+        rm(2);                  // X3 E*(D-X3) C Z3 q
+        add(4, 4, 8);           // 2C X3 E*(D-X3) C Z3 q
+        rm(6);                  // X3 E*(D-X3) 2C Z3 q
+        add(4, 4, 8);           // 4C X3 E*(D-X3) 2C Z3 q
+        rm(6);                  // X3 E*(D-X3) 4C Z3 q
+        add(4, 4, 8);           // 8C X3 E*(D-X3) 4C Z3 q
+        rm(6);                  // X3 E*(D-X3) 8C Z3 q
+        sub(2, 4, 8);           // E*(D-X3)-8C X3 E*(D-X3) 8C Z3 q
+        rm(6);                  // X3 E*(D-X3) Y3 Z3 q
+        rm(2);                  // X3 Y3 Z3 q
+
+        C.label("enddouble");
+        C.returnCall();
+    }
+
+    function addPoint() {     // p, xR, xI,    yR, yI,   zR zI, q
+
+
+        C.dup(0);           // p p X2 Y2 Z2 q
+
+        C.push(savedP);
+        C.mstore();
+
+        C.iszero();         // X2 Y2 Z2 q
+        C.jumpi("endpadd");
+
+
+        C.dup(4);
+        C.iszero();
+        C.dup(6);
+        C.iszero();
+        C.and();
+        C.jumpi("returnP");   // X2 Y2 Z2 q
+
+
+
+        // lastZ3 = (Z2+1)^2 - Z2^2
+        add1(4, 6);         // Z2+1 X2 Y2 Z2 q
+        square(0, 8);       // (Z2+1)^2 Z2+1 X2 Y2 Z2 q
+        rm(2);              // (Z2+1)^2 X2 Y2 Z2 q
+        square(6, 8);       // Z2^2 (Z2+1)^2 X2 Y2 Z2 q
+
+
+        sub(2, 0, 10);      // (Z2+1)^2-Z2^2 Z2^2 (Z2+1)^2 X2 Y2 Z2 q
+
+        saveZ3();           // Z2^2 (Z2+1)^2 X2 Y2 Z2 q
+        rm(2);              // Z2^2 X2 Y2 Z2 q
+
+        // U2 = X2
+        // S2 = Y2          // Z2^2 U2 S2 Z2 q
+
+
+        // U1 = X1 * Z2^2
+        loadX();            // X1 Z2^2 U2 S2 Z2 q
+        mul(0, 2, 10);      // X1*Z2^2 X1 Z2^2 U2 S2 Z2 q
+        rm(2);              // X1*Z2^2 Z2^2 U2 S2 Z2 q
+
+
+        mul(2, 8, 10);      // Z2^3 U1 Z2^2 U2 S2 Z2 q
+        rm(4);              // U1 Z2^3 U2 S2 Z2 q
+        rm(8);              // Z2^3 U2 S2 U1 q
+
+        // S1 = Y1 * Z1^3
+        loadY();            // Y1 Z2^3 U2 S2 U1 q
+        mul(0, 2, 10);      // S1 Y1 Z2^3 U2 S2 U1 q
+        rm(4);              // Y1 S1 U2 S2 U1 q
+        rm(0);              // S1 U2 S2 U1 q
+
+        cmp(0, 4);          // c1 S1 U2 S2 U1 q
+        cmp(3, 7);          // c2 c1 S1 U2 S2 U1 q
+        C.and();            // c2&c1 S1 U2 S2 U1 q
+        C.jumpi("double1"); // S1 U2 S2 U1 q
+
+
+        // Returns the double
+
+        // H = U2-U1  // Remove U2
+        C.sub(4, 8, 10);    // H S1 U2 S2 U1 q
+        rm(4);              // S1 H S2 U1 q
+
+        // // r = 2 * (S2-S1)  // Remove S2
+        C.sub(4, 4, 8);     // S1-S2 S1 H S2 U1 q
+        rm(6);              // S1 H S1-S2 U1 q
+        C.add(4, 4, 8);     // 2*(S1-S2) S1 H S1-S2 U1 q
+        rm(6);              // S1 H r U1 q
+
+        // I = (2 * H)^2
+        C.add(2, 2, 8);     // 2*H S1 H r U1 q
+        C.square(0, 10);    // (2*H)^2 2*H S1 H r U1 q
+        rm(2);              // I S1 H r U1 q
+
+        // V = U1 * I
+        mul(8, 0, 10);      // V I S1 H r U1 q
+        rm(10);             // I S1 H r V q
+
+        // J = H * I // Remove I
+        mul(4, 0, 10);      // J I S1 H r V q
+        rm(2);              // J S1 H r V q
+
+        // X3 = r^2 - J - 2 * V
+
+        // S1J2 = (S1*J)*2  // Remove S1
+        mul(2, 0, 10);      // S1*J J S1 H r V q
+        rm(4);              // J S1*J H r V q
+        add(2,2, 10);       // (S1*J)*2 J S1*J H r V q
+        rm(4);              // J S1J2 H r V q
+
+        // X3 = r^2 - J - 2 * V
+        square(6, 10);      // r^2 J S1J2 H r V q
+        sub(0, 2, 12);      // r^2-J r^2 J S1J2 H r V q
+        rm(2);              // r^2-J J S1J2 H r V q
+        rm(2);              // r^2-J S1J2 H r V q
+        add(8, 8, 10);      // 2*V r^2-J S1J2 H r V q
+        sub(2, 0, 12);      // r^2-J-2*V 2*V r^2-J S1J2 H r V q
+        rm(4);              // 2*V  X3 S1J2 H r V q
+        rm(0);              // X3 S1J2 H r V q
+
+        // Y3 = r * (V-X3)-S1J2
+
+        sub(8, 0, 10);      // V-X3 X3 S1J2 H r V q
+        rm(10);             // X3 S1J2 H r V-X3 q
+        mul(6, 8, 10);      // r*(V-X3) X3 S1J2 H r V-X3 q
+        rm(8);              // X3 S1J2 H r*(V-X3) V-X3 q
+        rm(8);              // S1J2 H r*(V-X3) X3 q
+        sub(4, 0, 8);       // Y3 S1J2 H r*(V-X3) X3 q
+        rm(6);              // S1J2 H Y3 X3 q
+        rm(0);              // H Y3 X3 q
+
+        // Z3 = lastZ * H
+        loadZ3();           // lastZ3 H Y3 X3 q
+        mul(0, 2, 8);       // Z3 lastZ3 H Y3 X3 q
+        rm(4);              // lastZ3 Z3 Y3 X3 q
+        rm(0);              // Z3 Y3 X3 q
+
+        C.swap(1);
+        C.swap(5);
+        C.swap(1);
+        C.swap(4);          // X3 Y3 Z3 q
+
+        // returns the point in memory
+        C.label("returnP"); // X Y Z q
+        rm(0);
+        rm(0);
+        rm(0);
+        C.push(0);
+        C.push(1);
+        loadX();
+        loadY();
+        C.jump("endpadd");
+
+        C.label("double1"); // S1 U2 S2 U1 q
+        rm(0);
+        rm(0);
+        rm(0);
+        rm(0);
+        C.push(0);
+        C.push(1);
+        loadX();
+        loadY();
+        C.jump("double");
+
+        C.label("endpadd");
+        C.returnCall();
+
+        function loadX() {
+            C.push(savedP);
+            C.mload();                  // p
+            C.push(32);
+            C.mul();                    // P*32
+            C.push(VAR_POINTS+32);
+            C.add();                    // P*32+32
+            C.dup();                    // P*32+32 P*32+32
+            C.mload();                  // im P*32+32
+            C.swap(1);                  // P*32+32 im
+            C.push(0x20);               // 32 P*32+32 im
+            C.sub();                    // P*32 im
+            C.mload();                  // re im
+        }
+
+        function loadY() {
+            C.push(savedP);
+            C.mload();                  // p
+            C.push(32);
+            C.mul();                    // P*32
+            C.push(VAR_POINTS+32*3);
+            C.add();                    // P*32+32
+            C.dup();                    // P*32+32 P*32+32
+            C.mload();                  // im P*32+32
+            C.swap(1);                  // P*32+32 im
+            C.push(0x20);               // 32 P*32+32 im
+            C.sub();                    // P*32 im
+            C.mload();                  // re im
+        }
+
+        function loadZ3() {
+            C.push(savedZ3+32);
+            C.mload();                  // p
+            C.push(savedZ3);
+            C.mload();
+        }
+
+        function saveZ3() {
+            C.push(savedZ3);
+            C.mstore();
+            C.push(savedZ3+32);
+            C.mstore();
+        }
+    }
+
+    function affine() { // X Y Z q
+        // If Z2=0 return 0
+        C.label("affine");
+        C.dup(4);
+        C.dup(5 + 1);
+        C.or();
+        C.jumpi("notZero");     // X Y Z q
+        rm(0);
+        rm(0);
+        C.push(0);
+        C.push(0);
+
+        C.jmp("endAffine");
+        C.label("notZero");
+
+        inverse2(4,6);          // Z_inv X Y Z q
+        square(2, 8);           // Z2_inv Z_inv X Y Z q
+        mul(0, 2, 10);          // Z3_inv Z2_inv Z_inv X Y Z q
+        rm(4);                  // Z2_inv Z3_inv X Y Z q
+        C.push(1);
+        C.push(0);              // 1 Z2_inv Z3_inv X Y Z q
+        rm(10);                 // Z2_inv Z3_inv X Y 1 q
+        mul(2, 6, 10);          // YI Z2_inv Z3_inv X Y 1 q
+        rm(8);                  // Z2_inv Z3_inv X YI 1 q
+        mul(0, 4, 10);          // XI Z2_inv Z3_inv X YI 1 q
+        rm(6);                  // Z2_inv Z3_inv XI YI 1 q
+        rm(0);                  // Z3_inv XI YI 1 q
+        rm(0);                  // XI YI 1 q
+        C.label("endAffine");
+        C.returnCall();
+    }
+
+    function inverse2(a, q) {
+        C.dup(q);           // q
+        C.dup(q + 1);       // q q
+        C.push(2);          // 2 q q
+        C.sub();            // q-2 q
+        C.dup(q + 2);       // q q-2 q
+        C.dup(q + 3);       // q q q-2 q
+        C.dup(a + 4);       // ar q q q-2 q
+        C.dup(a + 5);       // ar ar q q q-2 q
+        C.mulmod();         // t0 q q-2 q
+
+        C.dup(q   + 4);     // q t0 q q-2 q
+        C.dup(a+1 + 5);     // ai q t0 q q-2 q
+        C.dup(a+1 + 6);     // ai ai q t0 q q-2 q
+        C.mulmod();         // t1 t0 q q-2 q
+
+        C.addmod();         // t2 q-2 q
+        C.expmod();         // t3
+
+        C.dup(q + 1);       // q t3
+        C.dup(q + 2);       // q q t3
+        C.dup(q + 3);       // q q q t3
+        C.dup(1);           // t3 q q q t3
+        C.sub();            // -t3 q q t3
+        C.dup(a+1 + 3);     // ai -t3 q q t3
+        C.mulmod();         // ii q t3
+        C.swap(2);          // t3 q ii
+        C.dup(a + 3);       // ar t3 q ii
+        C.mulmod();         // ir ii
+    }
+
+    function storeVals() {
+        C.push(VAR_POINTS);                 // p
+        for (let i=0; i<NPOINTS; i++) {
+            const MP = G2.affine(G2.mulScalar(P, bigInt(i)));
+            for (let j=0; j<2; j++) {
+                for (let k=0; k<2; k++) {
+                    C.push(toHex256(MP[j][k]));     // MP[0][0] p
+                    C.dup(1);                       // p MP[0][0] p
+                    C.mstore();                     // p
+                    C.push(32);                     // 32 p
+                    C.add();                        // p+32
+                }
+            }
+        }
+    }
+
+}
+
+module.exports.abi = [
+    {
+        "constant": true,
+        "inputs": [
+            {
+                "name": "escalar",
+                "type": "uint256"
+            }
+        ],
+        "name": "mulexp",
+        "outputs": [
+            {
+                "name": "",
+                "type": "uint256"
+            },
+            {
+                "name": "",
+                "type": "uint256"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "pure",
+        "type": "function"
+    }
+];
+
+module.exports.createCode = createCode;
diff --git a/test/circuits/eddsaposeidon_test.circom b/test/circuits/eddsaposeidon_test.circom
new file mode 100644
index 0000000..98f96c7
--- /dev/null
+++ b/test/circuits/eddsaposeidon_test.circom
@@ -0,0 +1,3 @@
+include "../../circuits/eddsaposeidon.circom";
+
+component main = EdDSAPoseidonVerifier();
diff --git a/test/circuits/greatereqthan.circom b/test/circuits/greatereqthan.circom
new file mode 100644
index 0000000..3428ac2
--- /dev/null
+++ b/test/circuits/greatereqthan.circom
@@ -0,0 +1,4 @@
+
+include "../../circuits/comparators.circom";
+
+component main = GreaterEqThan(32);
diff --git a/test/circuits/greaterthan.circom b/test/circuits/greaterthan.circom
new file mode 100644
index 0000000..b890ba8
--- /dev/null
+++ b/test/circuits/greaterthan.circom
@@ -0,0 +1,4 @@
+
+include "../../circuits/comparators.circom";
+
+component main = GreaterThan(32);
diff --git a/test/circuits/lesseqthan.circom b/test/circuits/lesseqthan.circom
new file mode 100644
index 0000000..db2eda4
--- /dev/null
+++ b/test/circuits/lesseqthan.circom
@@ -0,0 +1,4 @@
+
+include "../../circuits/comparators.circom";
+
+component main = LessEqThan(32);
diff --git a/test/circuits/mux1_1.circom b/test/circuits/mux1_1.circom
new file mode 100644
index 0000000..5a3afee
--- /dev/null
+++ b/test/circuits/mux1_1.circom
@@ -0,0 +1,31 @@
+include "../../circuits/mux1.circom";
+include "../../circuits/bitify.circom";
+
+
+template Constants() {
+    var i;
+    signal output out[2];
+
+    out[0] <== 37;
+    out[1] <== 47;
+}
+
+template Main() {
+    var i;
+    signal private input selector;
+    signal output out;
+
+    component mux = Mux1();
+    component n2b = Num2Bits(1);
+    component cst = Constants();
+
+    selector ==> n2b.in;
+    n2b.out[0] ==> mux.s;
+    for (i=0; i<2; i++) {
+        cst.out[i] ==> mux.c[i];
+    }
+
+    mux.out ==> out;
+}
+
+component main = Main();
diff --git a/test/circuits/mux2_1.circom b/test/circuits/mux2_1.circom
new file mode 100644
index 0000000..4bb6247
--- /dev/null
+++ b/test/circuits/mux2_1.circom
@@ -0,0 +1,35 @@
+include "../../circuits/mux2.circom";
+include "../../circuits/bitify.circom";
+
+
+template Constants() {
+    var i;
+    signal output out[4];
+
+    out[0] <== 37;
+    out[1] <== 47;
+    out[2] <== 53;
+    out[3] <== 71;
+}
+
+template Main() {
+    var i;
+    signal private input selector;
+    signal output out;
+
+    component mux = Mux2();
+    component n2b = Num2Bits(2);
+    component cst = Constants();
+
+    selector ==> n2b.in;
+    for (i=0; i<2; i++) {
+        n2b.out[i] ==> mux.s[i];
+    }
+    for (i=0; i<4; i++) {
+        cst.out[i] ==> mux.c[i];
+    }
+
+    mux.out ==> out;
+}
+
+component main = Main();
diff --git a/test/comparators.js b/test/comparators.js
index 575f7d7..6b3c0a0 100644
--- a/test/comparators.js
+++ b/test/comparators.js
@@ -36,7 +36,7 @@ describe("Sum test", () => {
         assert(witness[0].equals(snarkjs.bigInt(1)));
         assert(witness[1].equals(snarkjs.bigInt(1)));
     });
-    it("Should create a comparison", async() => {
+    it("Should create a comparison lessthan", async() => {
         const cirDef = await compiler(path.join(__dirname, "circuits", "lessthan.circom"));
 
         const circuit = new snarkjs.Circuit(cirDef);
@@ -74,4 +74,120 @@ describe("Sum test", () => {
         assert(witness[0].equals(snarkjs.bigInt(1)));
         assert(witness[1].equals(snarkjs.bigInt(0)));
     });
+    it("Should create a comparison lesseqthan", async() => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "lesseqthan.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(1)));
+
+        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(1)));
+    });
+    it("Should create a comparison greaterthan", async() => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "greaterthan.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(0)));
+
+        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(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "1" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "444" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "1", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "555", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+    });
+    it("Should create a comparison greatereqthan", async() => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "greatereqthan.circom"));
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        console.log("NConstraints BalancesUpdater: " + circuit.nConstraints);
+
+        let witness;
+        witness = circuit.calculateWitness({ "in[0]": "333", "in[1]": "444" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "1", "in[1]": "1" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "661", "in[1]": "660" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "1" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "444" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(0)));
+
+        witness = circuit.calculateWitness({ "in[0]": "1", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "555", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+
+        witness = circuit.calculateWitness({ "in[0]": "0", "in[1]": "0" });
+        assert(witness[0].equals(snarkjs.bigInt(1)));
+        assert(witness[1].equals(snarkjs.bigInt(1)));
+    });
 });
diff --git a/test/eddsamimc.js b/test/eddsamimc.js
index 97abcb3..76f0a4f 100644
--- a/test/eddsamimc.js
+++ b/test/eddsamimc.js
@@ -19,7 +19,7 @@ describe("EdDSA MiMC test", function () {
 
         circuit = new snarkjs.Circuit(cirDef);
 
-        console.log("NConstrains EdDSA: " + circuit.nConstraints);
+        console.log("NConstrains EdDSA MiMC: " + circuit.nConstraints);
     });
 
     it("Sign a single number", async () => {
diff --git a/test/eddsaposeidon.js b/test/eddsaposeidon.js
new file mode 100644
index 0000000..8b0e82a
--- /dev/null
+++ b/test/eddsaposeidon.js
@@ -0,0 +1,98 @@
+const chai = require("chai");
+const path = require("path");
+const snarkjs = require("snarkjs");
+const compiler = require("circom");
+
+const eddsa = require("../src/eddsa.js");
+
+const assert = chai.assert;
+
+const bigInt = snarkjs.bigInt;
+
+describe("EdDSA Poseidon test", function () {
+    let circuit;
+
+    this.timeout(100000);
+
+    before( async () => {
+        const cirDef = await compiler(path.join(__dirname, "circuits", "eddsaposeidon_test.circom"));
+
+        circuit = new snarkjs.Circuit(cirDef);
+
+        console.log("NConstrains EdDSA Poseidon: " + circuit.nConstraints);
+    });
+
+    it("Sign a single number", async () => {
+        const msg = bigInt(1234);
+
+        const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
+
+        const pubKey = eddsa.prv2pub(prvKey);
+
+        const signature = eddsa.signPoseidon(prvKey, msg);
+
+        assert(eddsa.verifyPoseidon(msg, signature, pubKey));
+
+        const w = circuit.calculateWitness({
+            enabled: 1,
+            Ax: pubKey[0],
+            Ay: pubKey[1],
+            R8x: signature.R8[0],
+            R8y: signature.R8[1],
+            S: signature.S,
+            M: msg});
+
+        assert(circuit.checkWitness(w));
+    });
+
+    it("Detect Invalid signature", async () => {
+        const msg = bigInt(1234);
+
+        const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
+
+        const pubKey = eddsa.prv2pub(prvKey);
+
+
+        const signature = eddsa.signPoseidon(prvKey, msg);
+
+        assert(eddsa.verifyPoseidon(msg, signature, pubKey));
+        try {
+            circuit.calculateWitness({
+                enabled: 1,
+                Ax: pubKey[0],
+                Ay: pubKey[1],
+                R8x: signature.R8[0].add(bigInt(1)),
+                R8y: signature.R8[1],
+                S: signature.S,
+                M: msg});
+            assert(false);
+        } catch(err) {
+            assert.equal(err.message, "Constraint doesn't match: 1 != 0");
+        }
+    });
+
+
+    it("Test a dissabled circuit with a bad signature", async () => {
+        const msg = bigInt(1234);
+
+        const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
+
+        const pubKey = eddsa.prv2pub(prvKey);
+
+
+        const signature = eddsa.signPoseidon(prvKey, msg);
+
+        assert(eddsa.verifyPoseidon(msg, signature, pubKey));
+
+        const w = circuit.calculateWitness({
+            enabled: 0,
+            Ax: pubKey[0],
+            Ay: pubKey[1],
+            R8x: signature.R8[0].add(bigInt(1)),
+            R8y: signature.R8[1],
+            S: signature.S,
+            M: msg});
+
+        assert(circuit.checkWitness(w));
+    });
+});
diff --git a/test/mimccontract.js b/test/mimccontract.js
index 671e469..9c135d5 100644
--- a/test/mimccontract.js
+++ b/test/mimccontract.js
@@ -1,4 +1,4 @@
-const TestRPC = require("ganache-cli");
+const ganache = require("ganache-cli");
 const Web3 = require("web3");
 const chai = require("chai");
 const mimcGenContract = require("../src/mimc_gencontract.js");
@@ -10,35 +10,31 @@ const log = (msg) => { if (process.env.MOCHA_VERBOSE) console.log(msg); };
 
 const SEED = "mimc";
 
-describe("MiMC Smart contract test", () => {
+describe("MiMC Smart contract test", function () {
     let testrpc;
     let web3;
     let mimc;
     let accounts;
 
-    before(async () => {
-        testrpc = TestRPC.server({
-            ws: true,
-            gasLimit: 5800000,
-            total_accounts: 10,
-        });
-
-        testrpc.listen(8546, "127.0.0.1");
+    this.timeout(100000);
 
-        web3 = new Web3("ws://127.0.0.1:8546");
+    before(async () => {
+        web3 = new Web3(ganache.provider(), null, { transactionConfirmationBlocks: 1 });
         accounts = await web3.eth.getAccounts();
     });
 
-    after(async () => testrpc.close());
-
     it("Should deploy the contract", async () => {
         const C = new web3.eth.Contract(mimcGenContract.abi);
 
         mimc = await C.deploy({
-            data: mimcGenContract.createCode(SEED, 91)
+            data: mimcGenContract.createCode(SEED, 91),
+            arguments: []
         }).send({
             gas: 1500000,
+            gasPrice: '30000000000000',
             from: accounts[0]
+        }).on("error", (error) => {
+            console.log("ERROR: "+error);
         });
     });
 
diff --git a/test/multiplexer.js b/test/multiplexer.js
index cf29b8c..62af0bb 100644
--- a/test/multiplexer.js
+++ b/test/multiplexer.js
@@ -9,7 +9,7 @@ const bigInt = snarkjs.bigInt;
 
 
 describe("Mux4 test", () => {
-    it("Should create a constant multiplexer", async () => {
+    it("Should create a constant multiplexer 4", async () => {
 
         const cirDef = await compiler(path.join(__dirname, "circuits", "mux4_1.circom"));
 
@@ -50,7 +50,7 @@ describe("Mux4 test", () => {
         }
     });
 
-    it("Should create a constant multiplexer", async () => {
+    it("Should create a constant multiplexer 3", async () => {
 
         const cirDef = await compiler(path.join(__dirname, "circuits", "mux3_1.circom"));
 
@@ -74,6 +74,52 @@ describe("Mux4 test", () => {
 
             assert(w[0].equals(bigInt(1)));
 
+            // console.log(i + " -> " + w[circuit.getSignalIdx("main.out")].toString());
+            assert(w[circuit.getSignalIdx("main.out")].equals(ct8[i]));
+        }
+    });
+    it("Should create a constant multiplexer 2", async () => {
+
+        const cirDef = await compiler(path.join(__dirname, "circuits", "mux2_1.circom"));
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        console.log("NConstrains Mux2: " + circuit.nConstraints);
+
+        const ct8 = [
+            bigInt("37"),
+            bigInt("47"),
+            bigInt("53"),
+            bigInt("71"),
+        ];
+
+        for (let i=0; i<4; i++) {
+            const w = circuit.calculateWitness({ "selector": i });
+
+            assert(w[0].equals(bigInt(1)));
+
+            // console.log(i + " -> " + w[circuit.getSignalIdx("main.out")].toString());
+            assert(w[circuit.getSignalIdx("main.out")].equals(ct8[i]));
+        }
+    });
+    it("Should create a constant multiplexer 1", async () => {
+
+        const cirDef = await compiler(path.join(__dirname, "circuits", "mux1_1.circom"));
+
+        const circuit = new snarkjs.Circuit(cirDef);
+
+        console.log("NConstrains Mux1: " + circuit.nConstraints);
+
+        const ct8 = [
+            bigInt("37"),
+            bigInt("47"),
+        ];
+
+        for (let i=0; i<2; i++) {
+            const w = circuit.calculateWitness({ "selector": i });
+
+            assert(w[0].equals(bigInt(1)));
+
             // console.log(i + " -> " + w[circuit.getSignalIdx("main.out")].toString());
             assert(w[circuit.getSignalIdx("main.out")].equals(ct8[i]));
         }
diff --git a/test/poseidoncontract.js b/test/poseidoncontract.js
index 091ec4f..4a04d55 100644
--- a/test/poseidoncontract.js
+++ b/test/poseidoncontract.js
@@ -1,4 +1,4 @@
-const TestRPC = require("ganache-cli");
+const ganache = require("ganache-cli");
 const Web3 = require("web3");
 const chai = require("chai");
 const poseidonGenContract = require("../src/poseidon_gencontract.js");
@@ -17,20 +17,10 @@ describe("Poseidon Smart contract test", () => {
     let accounts;
 
     before(async () => {
-        testrpc = TestRPC.server({
-            ws: true,
-            gasLimit: 5800000,
-            total_accounts: 10,
-        });
-
-        testrpc.listen(8546, "127.0.0.1");
-
-        web3 = new Web3("ws://127.0.0.1:8546");
+        web3 = new Web3(ganache.provider(), null, { transactionConfirmationBlocks: 1 });
         accounts = await web3.eth.getAccounts();
     });
 
-    after(async () => testrpc.close());
-
     it("Should deploy the contract", async () => {
         const C = new web3.eth.Contract(poseidonGenContract.abi);