circomlib/circuits/smt/smthash_poseidon.circom

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/*
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 "../poseidon.circom";
/*
Hash1 = H(1 | key | value)
*/
template SMTHash1() {
signal input key;
signal input value;
signal output out;
component h = Poseidon(3); // Constant
h.inputs[0] <== key;
h.inputs[1] <== value;
h.inputs[2] <== 1;
out <== h.out;
}
/*
This component is used to create the 2 nodes.
Hash2 = H(Hl | Hr)
*/
template SMTHash2() {
signal input L;
signal input R;
signal output out;
component h = Poseidon(2); // Constant
h.inputs[0] <== L;
h.inputs[1] <== R;
out <== h.out;
}