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MinaNFTTreeVerifierFunction,
TreeElement,
BaseRedactedMinaNFTTreeState,
};
import {
Field,
SelfProof,
ZkProgram,
Struct,
Poseidon,
MerkleWitness,
method,
DeployArgs,
Permissions,
SmartContract,
} from "o1js";
class TreeElement extends Struct({
originalRoot: Field,
redactedRoot: Field,
index: Field,
value: Field,
}) {
public toJSON() {
return {
originalRoot: this.originalRoot.toJSON(),
redactedRoot: this.redactedRoot.toJSON(),
index: this.index.toJSON(),
value: this.value.toJSON(),
};
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
public static fromJSON(json: any) {
return new TreeElement({
originalRoot: Field.fromJSON(json.originalRoot),
redactedRoot: Field.fromJSON(json.redactedRoot),
index: Field.fromJSON(json.index),
value: Field.fromJSON(json.value),
});
}
}
class BaseRedactedMinaNFTTreeState extends Struct({
originalRoot: Field, // root of the original Tree
redactedRoot: Field, // root of the Redacted Tree
hash: Field, // hash of all the keys and values of the Redacted Tree
count: Field, // number of keys in the Redacted Map
}) {}
function MinaNFTTreeVerifierFunction(height: number) {
class MerkleTreeWitness extends MerkleWitness(height) {}
class RedactedMinaNFTTreeState extends BaseRedactedMinaNFTTreeState {
static create(
element: TreeElement,
originalWitness: MerkleTreeWitness,
redactedWitness: MerkleTreeWitness
) {
const originalWitnessRoot = originalWitness.calculateRoot(element.value);
element.originalRoot.assertEquals(originalWitnessRoot);
const calculatedOriginalIndex = originalWitness.calculateIndex();
calculatedOriginalIndex.assertEquals(element.index);
const redactedWitnessRoot = redactedWitness.calculateRoot(element.value);
element.redactedRoot.assertEquals(redactedWitnessRoot);
const calculatedRedactedIndex = redactedWitness.calculateIndex();
calculatedRedactedIndex.assertEquals(element.index);
return new RedactedMinaNFTTreeState({
originalRoot: element.originalRoot,
redactedRoot: element.redactedRoot,
hash: Poseidon.hash([element.index, element.value]),
count: Field(1),
});
}
static merge(
state1: RedactedMinaNFTTreeState,
state2: RedactedMinaNFTTreeState
) {
state1.originalRoot.assertEquals(state2.originalRoot);
state1.redactedRoot.assertEquals(state2.redactedRoot);
return new RedactedMinaNFTTreeState({
originalRoot: state1.originalRoot,
redactedRoot: state1.redactedRoot,
hash: state1.hash.add(state2.hash),
count: state1.count.add(state2.count),
});
}
static assertEquals(
state1: RedactedMinaNFTTreeState,
state2: RedactedMinaNFTTreeState
) {
state1.originalRoot.assertEquals(state2.originalRoot);
state1.redactedRoot.assertEquals(state2.redactedRoot);
state1.hash.assertEquals(state2.hash);
state1.count.assertEquals(state2.count);
}
}
const RedactedMinaNFTTreeCalculation = ZkProgram({
name: "RedactedMinaNFTTreeCalculation_" + height.toString(),
publicInput: RedactedMinaNFTTreeState,
methods: {
create: {
privateInputs: [TreeElement, MerkleTreeWitness, MerkleTreeWitness],
async method(
state: RedactedMinaNFTTreeState,
element: TreeElement,
originalWitness: MerkleTreeWitness,
redactedWitness: MerkleTreeWitness
) {
const computedState = RedactedMinaNFTTreeState.create(
element,
originalWitness,
redactedWitness
);
RedactedMinaNFTTreeState.assertEquals(computedState, state);
},
},
merge: {
privateInputs: [SelfProof, SelfProof],
async method(
newState: RedactedMinaNFTTreeState,
proof1: SelfProof<RedactedMinaNFTTreeState, void>,
proof2: SelfProof<RedactedMinaNFTTreeState, void>
) {
proof1.verify();
proof2.verify();
const computedState = RedactedMinaNFTTreeState.merge(
proof1.publicInput,
proof2.publicInput
);
RedactedMinaNFTTreeState.assertEquals(computedState, newState);
},
},
},
});
class RedactedMinaNFTTreeStateProof extends ZkProgram.Proof(
RedactedMinaNFTTreeCalculation
) {}
class MinaNFTTreeVerifier extends SmartContract {
async deploy(args: DeployArgs) {
super.deploy(args);
this.account.permissions.set({
...Permissions.default(),
setDelegate: Permissions.proof(),
incrementNonce: Permissions.proof(),
setVotingFor: Permissions.proof(),
setTiming: Permissions.proof(),
});
}
@method async verifyRedactedTree(proof: RedactedMinaNFTTreeStateProof) {
proof.verify();
}
}
return {
RedactedMinaNFTTreeState,
RedactedMinaNFTTreeCalculation,
MinaNFTTreeVerifier,
MerkleTreeWitness,
RedactedMinaNFTTreeStateProof,
};
}
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