transfer() and transferLocked() with new circuits

Signed-off-by: Jim Zhang <[email protected]>

solidity/contracts/lib/common.sol

@@ -15,6 +15,8 @@
 // limitations under the License.
 pragma solidity ^0.8.27;
 
+import {PoseidonUnit3L} from "@iden3/contracts/lib/Poseidon.sol";
+
 /// @title A core library for Zeto based token contracts
 /// @author Kaleido, Inc.
 /// @dev Implements common utility functions, such as proofs hashing and sorting
@@ -59,4 +61,12 @@ library Commonlib {
 
         return keccak256(abi.encodePacked(inputs));
     }
+
+    function getLeafNodeHash(
+        uint256 index,
+        uint256 value
+    ) internal pure returns (uint256) {
+        uint256[3] memory params = [index, value, uint256(1)];
+        return PoseidonUnit3L.poseidon(params);
+    }
 }

solidity/contracts/lib/interfaces/izeto_lockable.sol

@@ -19,6 +19,7 @@ import {Commonlib} from "../common.sol";
 
 interface IZetoLockable {
     error UTXOAlreadyLocked(uint256 utxo);
+    error UTXONotLocked(uint256 utxo);
     error NotLockDelegate(uint256 utxo, address delegate, address sender);
     event UTXOsLocked(
         uint256[] inputs,

solidity/contracts/lib/verifier_anon_nullifier_transfer.sol

@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-3.0
+/*
+    Copyright 2021 0KIMS association.
+
+    This file is generated with [snarkJS](https://github.com/iden3/snarkjs).
+
+    snarkJS 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.
+
+    snarkJS 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 snarkJS. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+pragma solidity >=0.7.0 <0.9.0;
+
+contract Groth16Verifier_AnonNullifierTransfer {
+    // Scalar field size
+    uint256 constant r    = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
+    // Base field size
+    uint256 constant q   = 21888242871839275222246405745257275088696311157297823662689037894645226208583;
+
+    // Verification Key data
+    uint256 constant alphax  = 20491192805390485299153009773594534940189261866228447918068658471970481763042;
+    uint256 constant alphay  = 9383485363053290200918347156157836566562967994039712273449902621266178545958;
+    uint256 constant betax1  = 4252822878758300859123897981450591353533073413197771768651442665752259397132;
+    uint256 constant betax2  = 6375614351688725206403948262868962793625744043794305715222011528459656738731;
+    uint256 constant betay1  = 21847035105528745403288232691147584728191162732299865338377159692350059136679;
+    uint256 constant betay2  = 10505242626370262277552901082094356697409835680220590971873171140371331206856;
+    uint256 constant gammax1 = 11559732032986387107991004021392285783925812861821192530917403151452391805634;
+    uint256 constant gammax2 = 10857046999023057135944570762232829481370756359578518086990519993285655852781;
+    uint256 constant gammay1 = 4082367875863433681332203403145435568316851327593401208105741076214120093531;
+    uint256 constant gammay2 = 8495653923123431417604973247489272438418190587263600148770280649306958101930;
+    uint256 constant deltax1 = 11559732032986387107991004021392285783925812861821192530917403151452391805634;
+    uint256 constant deltax2 = 10857046999023057135944570762232829481370756359578518086990519993285655852781;
+    uint256 constant deltay1 = 4082367875863433681332203403145435568316851327593401208105741076214120093531;
+    uint256 constant deltay2 = 8495653923123431417604973247489272438418190587263600148770280649306958101930;
+
+
+    uint256 constant IC0x = 12965336239355451065377728838263564336455832852756106285329915889367179910844;
+    uint256 constant IC0y = 21266717082765079145279107240791882967271935211887697534282840438802556611138;
+
+    uint256 constant IC1x = 20415096428409244779003058634997676197645321938716463349566012895685648563129;
+    uint256 constant IC1y = 2504850739252174842588245578954831308407351753661546676448248125715996228551;
+
+    uint256 constant IC2x = 11538009073536561162431603046042378506434129710246113579796569619470355977356;
+    uint256 constant IC2y = 18200656560016022729405688044864673805927167342575989505621039477255562885095;
+
+    uint256 constant IC3x = 16060424900281789113856869053727496302295520075201955371229184101176742019112;
+    uint256 constant IC3y = 7833246346420318094523191406657909832948492362877179000610063345430143769697;
+
+    uint256 constant IC4x = 1167903139320461673730146790352309165100002152797819099757601178981873676571;
+    uint256 constant IC4y = 12981611873802789105958141408359145370994325864169284450155625189242411024122;
+
+    uint256 constant IC5x = 20773020415848698598468478160768655922713869022241397741152588611764469765759;
+    uint256 constant IC5y = 3428403864418547287693751509569561378183428598972823612146679585580293690972;
+
+    uint256 constant IC6x = 15674579346918082060062949471055203685989363986238424085033128428743473529013;
+    uint256 constant IC6y = 9126381316540146842373796334750733369806543224338767018342599704279030186328;
+
+    uint256 constant IC7x = 17375655877097475551894724405341759891777951116707914297938348038970054234761;
+    uint256 constant IC7y = 17844212665933336469595879705672773898766845640145736759052525282105784315179;
+
+
+    // Memory data
+    uint16 constant pVk = 0;
+    uint16 constant pPairing = 128;
+
+    uint16 constant pLastMem = 896;
+
+    function verifyProof(uint[2] calldata _pA, uint[2][2] calldata _pB, uint[2] calldata _pC, uint[7] calldata _pubSignals) public view returns (bool) {
+        assembly {
+            function checkField(v) {
+                if iszero(lt(v, r)) {
+                    mstore(0, 0)
+                    return(0, 0x20)
+                }
+            }
+
+            // G1 function to multiply a G1 value(x,y) to value in an address
+            function g1_mulAccC(pR, x, y, s) {
+                let success
+                let mIn := mload(0x40)
+                mstore(mIn, x)
+                mstore(add(mIn, 32), y)
+                mstore(add(mIn, 64), s)
+
+                success := staticcall(sub(gas(), 2000), 7, mIn, 96, mIn, 64)
+
+                if iszero(success) {
+                    mstore(0, 0)
+                    return(0, 0x20)
+                }
+
+                mstore(add(mIn, 64), mload(pR))
+                mstore(add(mIn, 96), mload(add(pR, 32)))
+
+                success := staticcall(sub(gas(), 2000), 6, mIn, 128, pR, 64)
+
+                if iszero(success) {
+                    mstore(0, 0)
+                    return(0, 0x20)
+                }
+            }
+
+            function checkPairing(pA, pB, pC, pubSignals, pMem) -> isOk {
+                let _pPairing := add(pMem, pPairing)
+                let _pVk := add(pMem, pVk)
+
+                mstore(_pVk, IC0x)
+                mstore(add(_pVk, 32), IC0y)
+
+                // Compute the linear combination vk_x
+
+                g1_mulAccC(_pVk, IC1x, IC1y, calldataload(add(pubSignals, 0)))
+
+                g1_mulAccC(_pVk, IC2x, IC2y, calldataload(add(pubSignals, 32)))
+
+                g1_mulAccC(_pVk, IC3x, IC3y, calldataload(add(pubSignals, 64)))
+
+                g1_mulAccC(_pVk, IC4x, IC4y, calldataload(add(pubSignals, 96)))
+
+                g1_mulAccC(_pVk, IC5x, IC5y, calldataload(add(pubSignals, 128)))
+
+                g1_mulAccC(_pVk, IC6x, IC6y, calldataload(add(pubSignals, 160)))
+
+                g1_mulAccC(_pVk, IC7x, IC7y, calldataload(add(pubSignals, 192)))
+
+
+                // -A
+                mstore(_pPairing, calldataload(pA))
+                mstore(add(_pPairing, 32), mod(sub(q, calldataload(add(pA, 32))), q))
+
+                // B
+                mstore(add(_pPairing, 64), calldataload(pB))
+                mstore(add(_pPairing, 96), calldataload(add(pB, 32)))
+                mstore(add(_pPairing, 128), calldataload(add(pB, 64)))
+                mstore(add(_pPairing, 160), calldataload(add(pB, 96)))
+
+                // alpha1
+                mstore(add(_pPairing, 192), alphax)
+                mstore(add(_pPairing, 224), alphay)
+
+                // beta2
+                mstore(add(_pPairing, 256), betax1)
+                mstore(add(_pPairing, 288), betax2)
+                mstore(add(_pPairing, 320), betay1)
+                mstore(add(_pPairing, 352), betay2)
+
+                // vk_x
+                mstore(add(_pPairing, 384), mload(add(pMem, pVk)))
+                mstore(add(_pPairing, 416), mload(add(pMem, add(pVk, 32))))
+
+
+                // gamma2
+                mstore(add(_pPairing, 448), gammax1)
+                mstore(add(_pPairing, 480), gammax2)
+                mstore(add(_pPairing, 512), gammay1)
+                mstore(add(_pPairing, 544), gammay2)
+
+                // C
+                mstore(add(_pPairing, 576), calldataload(pC))
+                mstore(add(_pPairing, 608), calldataload(add(pC, 32)))
+
+                // delta2
+                mstore(add(_pPairing, 640), deltax1)
+                mstore(add(_pPairing, 672), deltax2)
+                mstore(add(_pPairing, 704), deltay1)
+                mstore(add(_pPairing, 736), deltay2)
+
+
+                let success := staticcall(sub(gas(), 2000), 8, _pPairing, 768, _pPairing, 0x20)
+
+                isOk := and(success, mload(_pPairing))
+            }
+
+            let pMem := mload(0x40)
+            mstore(0x40, add(pMem, pLastMem))
+
+            // Validate that all evaluations ∈ F
+
+            checkField(calldataload(add(_pubSignals, 0)))
+
+            checkField(calldataload(add(_pubSignals, 32)))
+
+            checkField(calldataload(add(_pubSignals, 64)))
+
+            checkField(calldataload(add(_pubSignals, 96)))
+
+            checkField(calldataload(add(_pubSignals, 128)))
+
+            checkField(calldataload(add(_pubSignals, 160)))
+
+            checkField(calldataload(add(_pubSignals, 192)))
+
+
+            // Validate all evaluations
+            let isValid := checkPairing(_pA, _pB, _pC, _pubSignals, pMem)
+
+            mstore(0, isValid)
+             return(0, 0x20)
+         }
+     }
+ }