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remove explicit constraints on inputs

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poma 2019-11-02 04:32:28 +03:00
parent 0484408e82
commit 9efab84e65
1 changed files with 3 additions and 15 deletions
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18
circuits/withdraw.circom
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@ -31,9 +31,9 @@ template Withdraw(levels, rounds) {
signal input root; signal input root;
signal input nullifierHash; signal input nullifierHash;
signal input receiver; // not taking part in any computations signal input receiver; // not taking part in any computations
signal input relayer; // not taking part in any computations signal input relayer; // not taking part in any computations
signal input fee; // not taking part in any computations signal input fee; // not taking part in any computations
signal input refund; // not taking part in any computations signal input refund; // not taking part in any computations
signal private input nullifier; signal private input nullifier;
signal private input secret; signal private input secret;
signal private input pathElements[levels]; signal private input pathElements[levels];
@ -52,18 +52,6 @@ template Withdraw(levels, rounds) {
tree.pathElements[i] <== pathElements[i]; tree.pathElements[i] <== pathElements[i];
tree.pathIndex[i] <== pathIndex[i]; tree.pathIndex[i] <== pathIndex[i];
} }
// Add hidden signals to make sure that tampering with receiver or fee will invalidate the snark proof
// Most likely it is not required, but it's better to stay on the safe side and it only takes 2 constraints
// Squares are used to prevent optimizer from removing those constraints
signal receiverSquare;
signal feeSquare;
signal relayerSquare;
signal refundSquare;
receiverSquare <== receiver * receiver;
feeSquare <== fee * fee;
relayerSquare <== relayer * relayer;
refundSquare <== refund * refund;
} }
component main = Withdraw(16, 220); component main = Withdraw(16, 220);