miclockwork_thread_program/instructions/
thread_instruction_add.rs

1use anchor_lang::{
2    prelude::*,
3    solana_program::system_program,
4    system_program::{transfer, Transfer},
5};
6
7use crate::state::*;
8
9/// Accounts required by the `thread_instruction_add` instruction.
10#[derive(Accounts)]
11#[instruction(instruction: SerializableInstruction)]
12pub struct ThreadInstructionAdd<'info> {
13    /// The authority (owner) of the thread.
14    #[account(mut)]
15    pub authority: Signer<'info>,
16
17    /// The Solana system program
18    #[account(address = system_program::ID)]
19    pub system_program: Program<'info, System>,
20
21    /// The thread to be paused.
22    #[account(
23        mut,
24        seeds = [
25            SEED_THREAD,
26            thread.authority.as_ref(),
27            thread.id.as_slice(),
28        ],
29        bump = thread.bump,
30        has_one = authority
31    )]
32    pub thread: Account<'info, Thread>,
33}
34
35pub fn handler(
36    ctx: Context<ThreadInstructionAdd>,
37    instruction: SerializableInstruction,
38) -> Result<()> {
39    // Get accounts
40    let authority = &ctx.accounts.authority;
41    let thread = &mut ctx.accounts.thread;
42    let system_program = &ctx.accounts.system_program;
43
44    // Append the instruction.
45    thread.instructions.push(instruction);
46
47    // Reallocate mem for the thread account.
48    thread.realloc()?;
49
50    // If lamports are required to maintain rent-exemption, pay them.
51    let data_len = thread.to_account_info().data_len();
52    let minimum_rent = Rent::get().unwrap().minimum_balance(data_len);
53    if minimum_rent > thread.to_account_info().lamports() {
54        transfer(
55            CpiContext::new(
56                system_program.to_account_info(),
57                Transfer {
58                    from: authority.to_account_info(),
59                    to: thread.to_account_info(),
60                },
61            ),
62            minimum_rent
63                .checked_sub(thread.to_account_info().lamports())
64                .unwrap(),
65        )?;
66    }
67
68    Ok(())
69}
miclockwork_thread_program/instructions/thread_instruction_add.rs

miclockwork_thread_program/instructions/
thread_instruction_add.rs
