poseidon_client/transactions/
ed25519_program.rs

1use crate::{Instruction, ED25519_PROGRAM_ID};
2use bytemuck::{bytes_of, Pod, Zeroable};
3
4pub const PUBKEY_SERIALIZED_SIZE: usize = 32;
5pub const SIGNATURE_SERIALIZED_SIZE: usize = 64;
6pub const SIGNATURE_OFFSETS_SERIALIZED_SIZE: usize = 14;
7// bytemuck requires structures to be aligned
8pub const SIGNATURE_OFFSETS_START: usize = 2;
9pub const DATA_START: usize = SIGNATURE_OFFSETS_SERIALIZED_SIZE + SIGNATURE_OFFSETS_START;
10
11#[derive(Debug)]
12pub struct Ed25519ProgramCPI {
13    public_key: [u8; 32],
14    signature: [u8; 64],
15}
16
17impl Ed25519ProgramCPI {
18    pub fn new(public_key: [u8; 32]) -> Self {
19        Ed25519ProgramCPI {
20            public_key: public_key,
21            signature: [0u8; 64],
22        }
23    }
24
25    pub fn add_signature(&mut self, signature: [u8; 64]) -> &mut Self {
26        self.signature = signature;
27
28        self
29    }
30
31    pub fn build(&self, message: &[u8]) -> Instruction {
32        let mut instruction_data = Vec::with_capacity(
33            DATA_START
34                .saturating_add(SIGNATURE_SERIALIZED_SIZE)
35                .saturating_add(PUBKEY_SERIALIZED_SIZE)
36                .saturating_add(message.len()),
37        );
38
39        let num_signatures: u8 = 1;
40        let public_key_offset = DATA_START;
41        let signature_offset = public_key_offset.saturating_add(PUBKEY_SERIALIZED_SIZE);
42        let message_data_offset = signature_offset.saturating_add(SIGNATURE_SERIALIZED_SIZE);
43
44        // add padding byte so that offset structure is aligned
45        instruction_data.extend_from_slice(bytes_of(&[num_signatures, 0]));
46
47        let offsets = Ed25519SignatureOffsets {
48            signature_offset: signature_offset as u16,
49            signature_instruction_index: u16::MAX,
50            public_key_offset: public_key_offset as u16,
51            public_key_instruction_index: u16::MAX,
52            message_data_offset: message_data_offset as u16,
53            message_data_size: message.len() as u16,
54            message_instruction_index: u16::MAX,
55        };
56
57        instruction_data.extend_from_slice(bytes_of(&offsets));
58
59        debug_assert_eq!(instruction_data.len(), public_key_offset);
60
61        instruction_data.extend_from_slice(&self.public_key);
62
63        debug_assert_eq!(instruction_data.len(), signature_offset);
64
65        instruction_data.extend_from_slice(&self.signature);
66
67        debug_assert_eq!(instruction_data.len(), message_data_offset);
68
69        instruction_data.extend_from_slice(message);
70
71        Instruction {
72            program_id: ED25519_PROGRAM_ID,
73            accounts: vec![],
74            data: instruction_data,
75        }
76    }
77}
78
79use borsh::{BorshDeserialize, BorshSerialize};
80
81#[derive(Default, Debug, Copy, Clone, Zeroable, Pod, BorshDeserialize, BorshSerialize)]
82#[repr(C)]
83pub struct Ed25519SignatureOffsets {
84    signature_offset: u16,             // offset to ed25519 signature of 64 bytes
85    signature_instruction_index: u16,  // instruction index to find signature
86    public_key_offset: u16,            // offset to public key of 32 bytes
87    public_key_instruction_index: u16, // instruction index to find public key
88    message_data_offset: u16,          // offset to start of message data
89    message_data_size: u16,            // size of message data
90    message_instruction_index: u16,    // index of instruction data to get message data
91}
poseidon_client/transactions/ed25519_program.rs

poseidon_client/transactions/
ed25519_program.rs
