// 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 TransactVerifier {
    // 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 = 11558715336555757039642994281208653283840119327060640220532048284191389392009;
    uint256 constant deltax2 = 19919680049690174141902304696803418526243317727275177350669081160779341871785;
    uint256 constant deltay1 = 18967012362683510719592365485905408537470306814764577165307204988251708285030;
    uint256 constant deltay2 = 10310741582428925982459159021428234227930144140844782580753103782899358455623;

    
    uint256 constant IC0x = 10543373053747236945848372337393310641493127784176282602620289491642155238855;
    uint256 constant IC0y = 10513090186464858754190380325321419748562657196269627226907358325244251353463;
    
    uint256 constant IC1x = 1629130929063887649934130751455982971653675351051565745972632492235248851693;
    uint256 constant IC1y = 20171677281530807243720329564011359316467153660239909816673853546782680491282;
    
    uint256 constant IC2x = 11612447725356261651521112432930689630433614191542697404849947849438619241560;
    uint256 constant IC2y = 17121372186315870160222209754699028160755668278300523563975099373158964342299;
    
    uint256 constant IC3x = 19984089044656783122450564635789855847812712750897839284326033776633590464406;
    uint256 constant IC3y = 9084755999828942057330867764441618771520273770926962492646950031249647415363;
    
    uint256 constant IC4x = 20402273790500227385354739902595252224060505648867385190454159663116632033898;
    uint256 constant IC4y = 7995380465228022207001434334538832243870154226163983415819294031344507485969;
    
    uint256 constant IC5x = 9128934266102426827581425101496055527207101397114864177462890388857827310656;
    uint256 constant IC5y = 4048039616748962346909835396876100254464840512983301343659341374796729383171;
    
    uint256 constant IC6x = 7371528565169897273868845834363668017355264266039572904574545806691324168189;
    uint256 constant IC6y = 13665865882326828962600250978899448852640457909108939515316821222745259057543;
    
    uint256 constant IC7x = 20957600565675064442599498489792873111424844361595084288751881186081001321910;
    uint256 constant IC7y = 8130215951241878519100900182441163017183207462437571080529654161397755914571;
    
    uint256 constant IC8x = 10223602999095195586244671304497534627830633952982353468001347420040679381538;
    uint256 constant IC8y = 10166035067947343938228440271707506540411008733237528971157193826568817886957;
    
    uint256 constant IC9x = 9248253321420453988114196453605711091856055509193555880097860972628445068086;
    uint256 constant IC9y = 3085431176176611751917002514184155369591908947629009018089618902844932791319;
    
    uint256 constant IC10x = 15689881709007395034781060204110055973523155613215892345305132172363916542521;
    uint256 constant IC10y = 21235179298973569508870560649519338956876483459507607503651493770606182733854;
    
    uint256 constant IC11x = 15437121613270747986067965246815163492014554666559839812097999840063270763000;
    uint256 constant IC11y = 14922599228168373798149689098039886728038911529082093740917299182298506114047;
    
 
    // 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[11] 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)))
                
                g1_mulAccC(_pVk, IC8x, IC8y, calldataload(add(pubSignals, 224)))
                
                g1_mulAccC(_pVk, IC9x, IC9y, calldataload(add(pubSignals, 256)))
                
                g1_mulAccC(_pVk, IC10x, IC10y, calldataload(add(pubSignals, 288)))
                
                g1_mulAccC(_pVk, IC11x, IC11y, calldataload(add(pubSignals, 320)))
                

                // -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)))
            
            checkField(calldataload(add(_pubSignals, 224)))
            
            checkField(calldataload(add(_pubSignals, 256)))
            
            checkField(calldataload(add(_pubSignals, 288)))
            
            checkField(calldataload(add(_pubSignals, 320)))
            

            // Validate all evaluations
            let isValid := checkPairing(_pA, _pB, _pC, _pubSignals, pMem)

            mstore(0, isValid)
             return(0, 0x20)
         }
     }
 }