-
Notifications
You must be signed in to change notification settings - Fork 12
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #236 from dusk-network/mocello/235_default_feature
circuit: Add plonk dependency under default feature
- Loading branch information
Showing
8 changed files
with
306 additions
and
252 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,256 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| // | ||
| // Copyright (c) DUSK NETWORK. All rights reserved. | ||
|
|
||
| //! The [`Circuit`] trait implementation on [`TxCircuit`]. | ||
| use dusk_bls12_381::BlsScalar; | ||
| use dusk_jubjub::{GENERATOR, GENERATOR_NUMS}; | ||
| use dusk_plonk::prelude::{ | ||
| Circuit, Composer, Constraint, Error as PlonkError, Witness, WitnessPoint, | ||
| }; | ||
| use dusk_poseidon::{Domain, HashGadget}; | ||
| use jubjub_schnorr::gadgets; | ||
| use poseidon_merkle::zk::opening_gadget; | ||
|
|
||
| use crate::{sender_enc, InputNoteInfo, TxCircuit}; | ||
|
|
||
| impl<const H: usize, const I: usize> Circuit for TxCircuit<H, I> { | ||
| /// Transaction gadget proving the following properties in ZK for a generic | ||
| /// `I` input-notes and [`OUTPUT_NOTES`] output-notes: | ||
| /// | ||
| /// 1. Membership: every input-note is included in the Merkle tree of notes. | ||
| /// 2. Ownership: the sender holds the note secret key for every input-note. | ||
| /// 3. Nullification: the nullifier is calculated correctly. | ||
| /// 4. Minting: the value commitment for every input-note is computed | ||
| /// correctly. | ||
| /// 5. Balance integrity: the sum of the values of all input-notes is equal | ||
| /// to the sum of the values of all output-notes + the gas fee | ||
| /// + a deposit, where a deposit refers to funds being transferred to a | ||
| /// contract. | ||
| /// 6. Sender-data: Verify that the sender was encrypted correctly for each | ||
| /// output-note. | ||
| /// | ||
| /// The circuit has the following public inputs: | ||
| /// - `payload_hash` | ||
| /// - `root` | ||
| /// - `[nullifier; I]` | ||
| /// - `[output_value_commitment; 2]` | ||
| /// - `max_fee` | ||
| /// - `deposit` | ||
| /// - `(npk_out_0, npk_out_1)` | ||
| /// - `(enc_A_npk_out_0, enc_B_npk_out_0)` | ||
| /// - `(enc_A_npk_out_1, enc_B_npk_out_1)` | ||
| fn circuit(&self, composer: &mut Composer) -> Result<(), PlonkError> { | ||
| // Make the payload hash a public input of the circuit | ||
| let payload_hash = composer.append_public(self.payload_hash); | ||
|
|
||
| // Append the root as public input | ||
| let root_pi = composer.append_public(self.root); | ||
|
|
||
| let mut input_notes_sum = Composer::ZERO; | ||
|
|
||
| // Check membership, ownership and nullification of all input notes | ||
| for input_note_info in &self.input_notes_info { | ||
| let ( | ||
| note_pk, | ||
| note_pk_p, | ||
| note_type, | ||
| pos, | ||
| value, | ||
| value_blinder, | ||
| nullifier, | ||
| signature_u, | ||
| signature_r, | ||
| signature_r_p, | ||
| ) = input_note_info.append_to_circuit(composer); | ||
|
|
||
| // Verify: 2. Ownership | ||
| gadgets::verify_signature_double( | ||
| composer, | ||
| signature_u, | ||
| signature_r, | ||
| signature_r_p, | ||
| note_pk, | ||
| note_pk_p, | ||
| payload_hash, | ||
| )?; | ||
|
|
||
| // Verify: 3. Nullification | ||
| let computed_nullifier = HashGadget::digest( | ||
| composer, | ||
| Domain::Other, | ||
| &[*note_pk_p.x(), *note_pk_p.y(), pos], | ||
| )[0]; | ||
| composer.assert_equal(computed_nullifier, nullifier); | ||
|
|
||
| // Perform a range check ([0, 2^64 - 1]) on the value of the note | ||
| composer.component_range::<32>(value); | ||
|
|
||
| // Sum up all the input note values | ||
| let constraint = Constraint::new() | ||
| .left(1) | ||
| .a(input_notes_sum) | ||
| .right(1) | ||
| .b(value); | ||
| input_notes_sum = composer.gate_add(constraint); | ||
|
|
||
| // Commit to the value of the note | ||
| let pc_1 = composer.component_mul_generator(value, GENERATOR)?; | ||
| let pc_2 = composer | ||
| .component_mul_generator(value_blinder, GENERATOR_NUMS)?; | ||
| let value_commitment = composer.component_add_point(pc_1, pc_2); | ||
|
|
||
| // Compute the note hash | ||
| let note_hash = HashGadget::digest( | ||
| composer, | ||
| Domain::Other, | ||
| &[ | ||
| note_type, | ||
| *value_commitment.x(), | ||
| *value_commitment.y(), | ||
| *note_pk.x(), | ||
| *note_pk.y(), | ||
| pos, | ||
| ], | ||
| )[0]; | ||
|
|
||
| // Verify: 1. Membership | ||
| let root = opening_gadget( | ||
| composer, | ||
| &input_note_info.merkle_opening, | ||
| note_hash, | ||
| ); | ||
| composer.assert_equal(root, root_pi); | ||
| } | ||
|
|
||
| let mut tx_output_sum = Composer::ZERO; | ||
|
|
||
| // Commit to all output notes | ||
| for output_note_info in &self.output_notes_info { | ||
| // Append the witnesses to the circuit | ||
| let value = composer.append_witness(output_note_info.value); | ||
| // Append the value-commitment as public input | ||
| let expected_value_commitment = | ||
| composer.append_public_point(output_note_info.value_commitment); | ||
| let value_blinder = | ||
| composer.append_witness(output_note_info.value_blinder); | ||
|
|
||
| // Perform a range check ([0, 2^64 - 1]) on the value of the note | ||
| composer.component_range::<32>(value); | ||
|
|
||
| // Sum up all the output note values | ||
| let constraint = | ||
| Constraint::new().left(1).a(tx_output_sum).right(1).b(value); | ||
| tx_output_sum = composer.gate_add(constraint); | ||
|
|
||
| // Commit to the value of the note | ||
| let pc_1 = composer.component_mul_generator(value, GENERATOR)?; | ||
| let pc_2 = composer | ||
| .component_mul_generator(value_blinder, GENERATOR_NUMS)?; | ||
| let computed_value_commitment = | ||
| composer.component_add_point(pc_1, pc_2); | ||
|
|
||
| // Verify: 4. Minting | ||
| composer.assert_equal_point( | ||
| expected_value_commitment, | ||
| computed_value_commitment, | ||
| ); | ||
| } | ||
|
|
||
| // Append max_fee and deposit as public inputs | ||
| let max_fee = composer.append_public(self.max_fee); | ||
| let deposit = composer.append_public(self.deposit); | ||
|
|
||
| // Add the deposit and the max fee to the sum of the output-values | ||
| let constraint = Constraint::new() | ||
| .left(1) | ||
| .a(tx_output_sum) | ||
| .right(1) | ||
| .b(max_fee) | ||
| .fourth(1) | ||
| .d(deposit); | ||
| tx_output_sum = composer.gate_add(constraint); | ||
|
|
||
| // Verify: 5. Balance integrity | ||
| composer.assert_equal(input_notes_sum, tx_output_sum); | ||
|
|
||
| // Verify: 6. Sender-data | ||
| // appends as public input the note-pk of both output-notes: | ||
| // `(npk_out_0, npk_out_1)` | ||
| // and the encryption of the sender-pk.A and sender-pk.B, | ||
| // encrypted first with the note-pk of one output note: | ||
| // `(enc_A_npk_out_0, enc_B_npk_out_0) | ||
| // and then with the note-pk of the other note: | ||
| // `(enc_A_npk_out_1, enc_B_npk_out_1) | ||
| sender_enc::gadget( | ||
| composer, | ||
| self.sender_pk, | ||
| self.signatures, | ||
| [ | ||
| self.output_notes_info[0].note_pk, | ||
| self.output_notes_info[1].note_pk, | ||
| ], | ||
| [ | ||
| self.output_notes_info[0].sender_blinder, | ||
| self.output_notes_info[1].sender_blinder, | ||
| ], | ||
| self.output_notes_info[0].sender_enc, | ||
| self.output_notes_info[1].sender_enc, | ||
| payload_hash, | ||
| )?; | ||
|
|
||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| impl<const H: usize> InputNoteInfo<H> { | ||
| fn append_to_circuit( | ||
| &self, | ||
| composer: &mut Composer, | ||
| ) -> ( | ||
| WitnessPoint, | ||
| WitnessPoint, | ||
| Witness, | ||
| Witness, | ||
| Witness, | ||
| Witness, | ||
| Witness, | ||
| Witness, | ||
| WitnessPoint, | ||
| WitnessPoint, | ||
| ) { | ||
| // Append the nullifier as public-input | ||
| let nullifier = composer.append_public(self.nullifier); | ||
|
|
||
| let note_pk = composer | ||
| .append_point(*self.note.stealth_address().note_pk().as_ref()); | ||
| let note_pk_p = composer.append_point(self.note_pk_p); | ||
|
|
||
| let note_type = composer | ||
| .append_witness(BlsScalar::from(self.note.note_type() as u64)); | ||
| let pos = composer.append_witness(BlsScalar::from(*self.note.pos())); | ||
|
|
||
| let value = composer.append_witness(self.value); | ||
| let value_blinder = composer.append_witness(self.value_blinder); | ||
|
|
||
| let signature_u = composer.append_witness(*self.signature.u()); | ||
| let signature_r = composer.append_point(self.signature.R()); | ||
| let signature_r_p = composer.append_point(self.signature.R_prime()); | ||
|
|
||
| ( | ||
| note_pk, | ||
| note_pk_p, | ||
| note_type, | ||
| pos, | ||
| value, | ||
| value_blinder, | ||
| nullifier, | ||
| signature_u, | ||
| signature_r, | ||
| signature_r_p, | ||
| ) | ||
| } | ||
| } |
Oops, something went wrong.