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| 1 | +use { |
| 2 | + crate::{get_elgamal_registry_address, id}, |
| 3 | + solana_instruction::{AccountMeta, Instruction}, |
| 4 | + solana_program_error::ProgramError, |
| 5 | + solana_pubkey::Pubkey, |
| 6 | + solana_zk_sdk::zk_elgamal_proof_program::{ |
| 7 | + instruction::ProofInstruction, proof_data::PubkeyValidityProofData, |
| 8 | + }, |
| 9 | + spl_token_confidential_transfer_proof_extraction::instruction::ProofLocation, |
| 10 | +}; |
| 11 | + |
| 12 | +#[derive(Clone, Debug, PartialEq)] |
| 13 | +#[repr(u8)] |
| 14 | +pub enum RegistryInstruction { |
| 15 | + /// Initialize an ElGamal public key registry. |
| 16 | + /// |
| 17 | + /// 0. `[writable]` The account to be created |
| 18 | + /// 1. `[signer]` The wallet address (will also be the owner address for the |
| 19 | + /// registry account) |
| 20 | + /// 2. `[]` System program |
| 21 | + /// 3. `[]` Instructions sysvar if `VerifyPubkeyValidity` is included in the |
| 22 | + /// same transaction or context state account if `VerifyPubkeyValidity` |
| 23 | + /// is pre-verified into a context state account. |
| 24 | + CreateRegistry { |
| 25 | + /// Relative location of the `ProofInstruction::PubkeyValidityProof` |
| 26 | + /// instruction to the `CreateElGamalRegistry` instruction in the |
| 27 | + /// transaction. If the offset is `0`, then use a context state account |
| 28 | + /// for the proof. |
| 29 | + proof_instruction_offset: i8, |
| 30 | + }, |
| 31 | + /// Update an ElGamal public key registry with a new ElGamal public key. |
| 32 | + /// |
| 33 | + /// 0. `[writable]` The ElGamal registry account |
| 34 | + /// 1. `[]` Instructions sysvar if `VerifyPubkeyValidity` is included in the |
| 35 | + /// same transaction or context state account if `VerifyPubkeyValidity` |
| 36 | + /// is pre-verified into a context state account. |
| 37 | + /// 2. `[signer]` The owner of the ElGamal public key registry |
| 38 | + UpdateRegistry { |
| 39 | + /// Relative location of the `ProofInstruction::PubkeyValidityProof` |
| 40 | + /// instruction to the `UpdateElGamalRegistry` instruction in the |
| 41 | + /// transaction. If the offset is `0`, then use a context state account |
| 42 | + /// for the proof. |
| 43 | + proof_instruction_offset: i8, |
| 44 | + }, |
| 45 | +} |
| 46 | + |
| 47 | +impl RegistryInstruction { |
| 48 | + /// Unpacks a byte buffer into a `RegistryInstruction` |
| 49 | + pub fn unpack(input: &[u8]) -> Result<Self, ProgramError> { |
| 50 | + let (&tag, rest) = input |
| 51 | + .split_first() |
| 52 | + .ok_or(ProgramError::InvalidInstructionData)?; |
| 53 | + |
| 54 | + Ok(match tag { |
| 55 | + 0 => { |
| 56 | + let proof_instruction_offset = |
| 57 | + *rest.first().ok_or(ProgramError::InvalidInstructionData)?; |
| 58 | + Self::CreateRegistry { |
| 59 | + proof_instruction_offset: proof_instruction_offset as i8, |
| 60 | + } |
| 61 | + } |
| 62 | + 1 => { |
| 63 | + let proof_instruction_offset = |
| 64 | + *rest.first().ok_or(ProgramError::InvalidInstructionData)?; |
| 65 | + Self::UpdateRegistry { |
| 66 | + proof_instruction_offset: proof_instruction_offset as i8, |
| 67 | + } |
| 68 | + } |
| 69 | + _ => return Err(ProgramError::InvalidInstructionData), |
| 70 | + }) |
| 71 | + } |
| 72 | + |
| 73 | + /// Packs a `RegistryInstruction` into a byte buffer. |
| 74 | + pub fn pack(&self) -> Vec<u8> { |
| 75 | + let mut buf = vec![]; |
| 76 | + match self { |
| 77 | + Self::CreateRegistry { |
| 78 | + proof_instruction_offset, |
| 79 | + } => { |
| 80 | + buf.push(0); |
| 81 | + buf.extend_from_slice(&proof_instruction_offset.to_le_bytes()); |
| 82 | + } |
| 83 | + Self::UpdateRegistry { |
| 84 | + proof_instruction_offset, |
| 85 | + } => { |
| 86 | + buf.push(1); |
| 87 | + buf.extend_from_slice(&proof_instruction_offset.to_le_bytes()); |
| 88 | + } |
| 89 | + }; |
| 90 | + buf |
| 91 | + } |
| 92 | +} |
| 93 | + |
| 94 | +/// Create a `RegistryInstruction::CreateRegistry` instruction |
| 95 | +pub fn create_registry( |
| 96 | + owner_address: &Pubkey, |
| 97 | + proof_location: ProofLocation<PubkeyValidityProofData>, |
| 98 | +) -> Result<Vec<Instruction>, ProgramError> { |
| 99 | + let elgamal_registry_address = get_elgamal_registry_address(owner_address, &id()); |
| 100 | + |
| 101 | + let mut accounts = vec![ |
| 102 | + AccountMeta::new(elgamal_registry_address, false), |
| 103 | + AccountMeta::new_readonly(*owner_address, true), |
| 104 | + AccountMeta::new_readonly(solana_sdk_ids::system_program::id(), false), |
| 105 | + ]; |
| 106 | + let proof_instruction_offset = proof_instruction_offset(&mut accounts, proof_location); |
| 107 | + |
| 108 | + let mut instructions = vec![Instruction { |
| 109 | + program_id: id(), |
| 110 | + accounts, |
| 111 | + data: RegistryInstruction::CreateRegistry { |
| 112 | + proof_instruction_offset, |
| 113 | + } |
| 114 | + .pack(), |
| 115 | + }]; |
| 116 | + append_zk_elgamal_proof(&mut instructions, proof_location)?; |
| 117 | + Ok(instructions) |
| 118 | +} |
| 119 | + |
| 120 | +/// Create a `RegistryInstruction::UpdateRegistry` instruction |
| 121 | +pub fn update_registry( |
| 122 | + owner_address: &Pubkey, |
| 123 | + proof_location: ProofLocation<PubkeyValidityProofData>, |
| 124 | +) -> Result<Vec<Instruction>, ProgramError> { |
| 125 | + let elgamal_registry_address = get_elgamal_registry_address(owner_address, &id()); |
| 126 | + |
| 127 | + let mut accounts = vec![AccountMeta::new(elgamal_registry_address, false)]; |
| 128 | + let proof_instruction_offset = proof_instruction_offset(&mut accounts, proof_location); |
| 129 | + accounts.push(AccountMeta::new_readonly(*owner_address, true)); |
| 130 | + |
| 131 | + let mut instructions = vec![Instruction { |
| 132 | + program_id: id(), |
| 133 | + accounts, |
| 134 | + data: RegistryInstruction::UpdateRegistry { |
| 135 | + proof_instruction_offset, |
| 136 | + } |
| 137 | + .pack(), |
| 138 | + }]; |
| 139 | + append_zk_elgamal_proof(&mut instructions, proof_location)?; |
| 140 | + Ok(instructions) |
| 141 | +} |
| 142 | + |
| 143 | +/// Takes a `ProofLocation`, updates the list of accounts, and returns a |
| 144 | +/// suitable proof location |
| 145 | +fn proof_instruction_offset( |
| 146 | + accounts: &mut Vec<AccountMeta>, |
| 147 | + proof_location: ProofLocation<PubkeyValidityProofData>, |
| 148 | +) -> i8 { |
| 149 | + match proof_location { |
| 150 | + ProofLocation::InstructionOffset(proof_instruction_offset, _) => { |
| 151 | + accounts.push(AccountMeta::new_readonly( |
| 152 | + solana_sdk_ids::sysvar::instructions::id(), |
| 153 | + false, |
| 154 | + )); |
| 155 | + proof_instruction_offset.into() |
| 156 | + } |
| 157 | + ProofLocation::ContextStateAccount(context_state_account) => { |
| 158 | + accounts.push(AccountMeta::new_readonly(*context_state_account, false)); |
| 159 | + 0 |
| 160 | + } |
| 161 | + } |
| 162 | +} |
| 163 | + |
| 164 | +/// Takes a `RegistryInstruction` and appends the pubkey validity proof |
| 165 | +/// instruction |
| 166 | +fn append_zk_elgamal_proof( |
| 167 | + instructions: &mut Vec<Instruction>, |
| 168 | + proof_data_location: ProofLocation<PubkeyValidityProofData>, |
| 169 | +) -> Result<(), ProgramError> { |
| 170 | + if let ProofLocation::InstructionOffset(proof_instruction_offset, proof_data) = |
| 171 | + proof_data_location |
| 172 | + { |
| 173 | + let proof_instruction_offset: i8 = proof_instruction_offset.into(); |
| 174 | + if proof_instruction_offset != 1 { |
| 175 | + return Err(ProgramError::InvalidArgument); |
| 176 | + } |
| 177 | + instructions |
| 178 | + .push(ProofInstruction::VerifyPubkeyValidity.encode_verify_proof(None, proof_data)); |
| 179 | + } |
| 180 | + Ok(()) |
| 181 | +} |
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