programs/bond_servicing/src/instructions/register_holder.rs

1//! Register a holder (simulated KYC). The transfer hook requires a holder record on both sides, so only
2//! registered wallets can hold bonds. A holder registered after some record moments starts at zero for them.
3
4use anchor_lang::prelude::*;
5
6use crate::constants::*;
7use crate::events::HolderRegistered;
8use crate::state::{Bond, HolderRecord, PositionHistory};
9
10#[derive(Accounts)]
11#[instruction(owner: Pubkey)]
12pub struct RegisterHolder<'info> {
13    #[account(mut)]
14    pub registrar: Signer<'info>,
15
16    #[account(has_one = registrar)]
17    pub bond: Box<Account<'info, Bond>>,
18
19    #[account(
20        init,
21        payer = registrar,
22        space = 8 + HolderRecord::INIT_SPACE,
23        seeds = [HOLDER_SEED, bond.mint.as_ref(), owner.as_ref()],
24        bump,
25    )]
26    pub holder: Box<Account<'info, HolderRecord>>,
27
28    pub system_program: Program<'info, System>,
29}
30
31pub fn handle_register_holder(ctx: Context<RegisterHolder>, owner: Pubkey) -> Result<()> {
32    let bond = &ctx.accounts.bond;
33    let passed = bond.passed_record_moments(bond.now()?)?;
34
35    let holder = &mut ctx.accounts.holder;
36    holder.bond = bond.key();
37    holder.owner = owner;
38    holder.position = PositionHistory::new(passed);
39    holder.paid = 0;
40    holder.locked = 0;
41    holder.redeemed = 0;
42    holder.bump = ctx.bumps.holder;
43    emit!(HolderRegistered { bond: bond.key(), owner });
44    Ok(())
45}