1/*
 2    Copyright 2018 0KIMS association.
 3
 4    This file is part of circom (Zero Knowledge Circuit Compiler).
 5
 6    circom is a free software: you can redistribute it and/or modify it
 7    under the terms of the GNU General Public License as published by
 8    the Free Software Foundation, either version 3 of the License, or
 9    (at your option) any later version.
10
11    circom is distributed in the hope that it will be useful, but WITHOUT
12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14    License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with circom. If not, see <https://www.gnu.org/licenses/>.
18*/
19
20include "../mimc.circom";
21
22
23/*
24    Hash1 = H(1 | key | value)
25 */
26
27template SMTHash1() {
28    signal input key;
29    signal input value;
30    signal output out;
31
32    component h = MultiMiMC7(2, 91);   // Constant
33    h.in[0] <== key;
34    h.in[1] <== value;
35    h.k <== 1;
36
37    out <== h.out;
38}
39
40/*
41    This component is used to create the 2 nodes.
42
43    Hash2 = H(Hl | Hr)
44 */
45
46template SMTHash2() {
47    signal input L;
48    signal input R;
49    signal output out;
50
51    component h = MultiMiMC7(2, 91);   // Constant
52    h.in[0] <== L;
53    h.in[1] <== R;
54    h.k <== 0;
55
56    out <== h.out;
57}