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Sparse Merkle tree working

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Jordi Baylina 2018-12-15 09:15:58 +01:00
parent 09f36d1e4d
commit 6d6558370f
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GPG Key ID: 7480C80C1BE43112
7 changed files with 29 additions and 85588 deletions
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10
circuits/smt/smtverifier.circom
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@ -46,13 +46,6 @@ template SMTVerifier(nLevels) {
for (var i=0; i<nLevels; i++) smtLevIns.siblings[i] <== siblings[i]; for (var i=0; i<nLevels; i++) smtLevIns.siblings[i] <== siblings[i];
smtLevIns.enabled <== 1; smtLevIns.enabled <== 1;
component xors[nLevels];
for (var i=0; i<nLevels; i++) {
xors[i] = XOR();
xors[i].a <== n2bOld.out[i];
xors[i].b <== n2bNew.out[i];
}
component sm[nLevels]; component sm[nLevels];
for (var i=0; i<nLevels; i++) { for (var i=0; i<nLevels; i++) {
sm[i] = SMTVerifierSM(); sm[i] = SMTVerifierSM();
@ -70,11 +63,10 @@ template SMTVerifier(nLevels) {
sm[i].prev_na <== sm[i-1].st_na; sm[i].prev_na <== sm[i-1].st_na;
} }
sm[i].is0 <== isOld0; sm[i].is0 <== isOld0;
sm[i].xor <== xors[i].out;
sm[i].fnc <== fnc; sm[i].fnc <== fnc;
sm[i].levIns <== smtLevIns.levIns[i]; sm[i].levIns <== smtLevIns.levIns[i];
} }
// sm[nLevels-1].st_na === 1; sm[nLevels-1].st_na === 1;
component levels[nLevels]; component levels[nLevels];
for (var i=nLevels-1; i != -1; i--) { for (var i=nLevels-1; i != -1; i--) {

57
circuits/smt/smtverifiersm.circom
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@ -15,38 +15,32 @@ err state is not a state itself. It's a lack of state.
The end of the last level will have to be `na` The end of the last level will have to be `na`
levIns=0 ########### levIns=0 any
xor=1 # # ┌────┐ ┌────┐
fnc=1 ┌──────────▶# err # │ │ │ │
│ ## ## │ ▼ levIns=1 ▼ │
levIns=0 │ ######### │ ########### is0=1 ########### ########### │
xor=0 || fnc=0 │ any │ # # fnc=1 # # any # # │
┌────┐ │ ┌────┐ └──# top # ─────────────────────▶# i0 #───────────────▶# na #──┘
│ │ │ │ │ ## ## ──────────┐ ## ## ┌───────▶## ##
│ ▼ │ levIns=1 ▼ │ ########─────────────┐│ ######### │┌────────▶#########
│ ########### │ is0=1 ########### ########### │ ││ levIns=1 ││
│ # # ───────────┘ fnc=1 # # any # # │ ││ is0=0 ########### ││
└──# top # ─────────────────────▶# i0 #───────────────▶# na #──┘ ││ fnc=1 # # any│
## ## ──────────┐ ## ## ┌───────▶## ## │└──────────▶ # iold #────────┘│
########─────────────┐│ ######### │┌────────▶######### │ ## ## │
││ levIns=1 ││ │ ######### │
││ is0=0 ########### ││ │ │
││ fnc=1 # # any│ │ levIns=1 ########### │
│└──────────▶ # iold #────────┘│ │ fnc=0 # # any
│ ## ## │ └────────────▶# inew #─────────┘
│ ######### │ ## ##
│ │ #########
│ levIns=1 ########### │
│ fnc=0 # # any
└────────────▶# inew #─────────┘
## ##
#########
*/ */
template SMTVerifierSM() { template SMTVerifierSM() {
signal input xor;
signal input is0; signal input is0;
signal input levIns; signal input levIns;
signal input fnc; signal input fnc;
@ -65,19 +59,14 @@ template SMTVerifierSM() {
signal prev_top_lev_ins; signal prev_top_lev_ins;
signal prev_top_lev_ins_fnc; signal prev_top_lev_ins_fnc;
signal xor_fnc;
prev_top_lev_ins <== prev_top * levIns; prev_top_lev_ins <== prev_top * levIns;
prev_top_lev_ins_fnc <== prev_top_lev_ins*fnc; // prev_top * levIns * fnc prev_top_lev_ins_fnc <== prev_top_lev_ins*fnc; // prev_top * levIns * fnc
xor_fnc <== xor*fnc;
// st_top = prev_top * (1-levIns)
// st_top = prev_top * (1-levIns) * (1 - xor*fnc)
// = + prev_top // = + prev_top
// - prev_top * levIns // - prev_top * levIns
// - prev_top * xor * fnc st_top <== prev_top - prev_top_lev_ins;
// + prev_top * levIns * xor * fnc
st_top <== (prev_top - prev_top_lev_ins)*(1-xor_fnc);
// st_inew = prev_top * levIns * (1-fnc) // st_inew = prev_top * levIns * (1-fnc)
// = + prev_top * levIns // = + prev_top * levIns

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doc/smt_verifier_sm.monopic
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err.sig
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2
package.json
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@ -7,7 +7,7 @@
"test": "test" "test": "test"
}, },
"scripts": { "scripts": {
"test": "mocha" "test": "mocha --max-old-space-size=4000"
}, },
"keywords": [ "keywords": [
"pedersen", "pedersen",

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test.sig
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8
test/smtverifier.js
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@ -51,7 +51,7 @@ async function testExclusion(tree, key, circuit) {
isOld0: res.isOld0 ? 1 : 0, isOld0: res.isOld0 ? 1 : 0,
key: key, key: key,
value: 0 value: 0
}, console.log); });
assert(circuit.checkWitness(w)); assert(circuit.checkWitness(w));
} }
@ -82,13 +82,13 @@ describe("SMT test", function () {
}); });
it("Check exclussion in a tree of 3", async () => { it("Check exclussion in a tree of 3", async () => {
// await testExclusion(tree, 0, circuit); await testExclusion(tree, 0, circuit);
await testExclusion(tree, 6, circuit); await testExclusion(tree, 6, circuit);
/* await testExclusion(tree, 9, circuit); await testExclusion(tree, 9, circuit);
await testExclusion(tree, 33, circuit); await testExclusion(tree, 33, circuit);
await testExclusion(tree, 31, circuit); await testExclusion(tree, 31, circuit);
await testExclusion(tree, 16, circuit); await testExclusion(tree, 16, circuit);
await testExclusion(tree, 64, circuit); */ await testExclusion(tree, 64, circuit);
}); });