jup-lend-sdk 0.1.2

SDK for Jupiter lending protocol
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151

use super::{pda, FLOASHLOAN_PROGRAM_ID};
use crate::{
    liquidity::{self, LIQUIDITY_PROGRAM_ID},
    math::{casting::Cast, safe_math::SafeMath},
    programs::flashloan::{
        accounts::FlashloanAdmin,
        client::{accounts, args},
    },
};
use anchor_client::{
    solana_sdk::{
        commitment_config::CommitmentConfig, instruction::Instruction, signature::Keypair,
    },
    Client, Cluster,
};
use anchor_lang::{prelude::Pubkey, solana_program, system_program};
use spl_associated_token_account::{
    get_associated_token_address_with_program_id, ID as ASSOCIATED_TOKEN_PROGRAM_ID,
};
use std::sync::Arc;

#[derive(Debug, Clone)]
pub struct FlashloanParams {
    pub amount: u64,
    pub asset: Pubkey,
    pub cluster: Cluster,
    pub signer: Pubkey,
}

#[derive(Debug, Clone)]
pub struct Flashloan {
    pub borrow_ix: Instruction,
    pub payback_ix: Instruction,
}

pub fn get_flashloan_ix(params: FlashloanParams) -> anyhow::Result<Flashloan> {
    let provider = Client::new_with_options(
        params.cluster.clone(),
        Arc::new(Keypair::new()),
        CommitmentConfig::confirmed(),
    );
    let program = provider.program(FLOASHLOAN_PROGRAM_ID)?;

    let token_program = {
        let account = program
            .rpc()
            .get_account(&params.asset)
            .expect("Failed to get asset account");
        let program_id = account.owner;

        program_id
    };

    let flashloan_admin: FlashloanAdmin = program.account(pda::get_flashloan_admin())?;

    let borrow_ix = program
        .request()
        .accounts(accounts::FlashloanBorrow {
            signer: params.signer,
            flashloan_admin: pda::get_flashloan_admin(),
            signer_borrow_token_account: get_associated_token_address_with_program_id(
                &params.signer,
                &params.asset,
                &token_program,
            ),
            mint: params.asset,
            flashloan_token_reserves_liquidity: liquidity::pda::get_token_reserve(params.asset),
            flashloan_borrow_position_on_liquidity: liquidity::pda::get_user_borrow_position(
                params.asset,
                pda::get_flashloan_admin(),
            ),
            rate_model: liquidity::pda::get_rate_model(params.asset),
            vault: get_associated_token_address_with_program_id(
                &liquidity::pda::get_liquidity(),
                &params.asset,
                &token_program,
            ),
            liquidity: liquidity::pda::get_liquidity(),
            liquidity_program: LIQUIDITY_PROGRAM_ID,
            token_program,
            associated_token_program: ASSOCIATED_TOKEN_PROGRAM_ID,
            system_program: system_program::ID,
            instruction_sysvar: solana_program::sysvar::instructions::ID,
        })
        .args(args::FlashloanBorrow {
            amount: params.amount,
        })
        .instructions()?
        .remove(0);

    let flashloan_fee: u128 = flashloan_admin
        .flashloan_fee
        .cast()
        .map_err(|err| anyhow::Error::msg(err.to_string()))?;

    let flashloan_fee_amount = params
        .amount
        .cast::<u128>()
        .map_err(|err| anyhow::Error::msg(err.to_string()))?
        .safe_mul(flashloan_fee)
        .map_err(|err| anyhow::Error::msg(err.to_string()))?
        .safe_div_ceil(10000)
        .map_err(|err| anyhow::Error::msg(err.to_string()))?
        .cast::<u64>()
        .map_err(|err| anyhow::Error::msg(err.to_string()))?;

    let payback_amount = params
        .amount
        .safe_add(flashloan_fee_amount)
        .map_err(|err| anyhow::Error::msg(err.to_string()))?;

    let payback_ix = program
        .request()
        .accounts(accounts::FlashloanPayback {
            signer: params.signer,
            flashloan_admin: pda::get_flashloan_admin(),
            signer_borrow_token_account: get_associated_token_address_with_program_id(
                &params.signer,
                &params.asset,
                &token_program,
            ),
            mint: params.asset,
            flashloan_token_reserves_liquidity: liquidity::pda::get_token_reserve(params.asset),
            flashloan_borrow_position_on_liquidity: liquidity::pda::get_user_borrow_position(
                params.asset,
                pda::get_flashloan_admin(),
            ),
            rate_model: liquidity::pda::get_rate_model(params.asset),
            vault: get_associated_token_address_with_program_id(
                &liquidity::pda::get_liquidity(),
                &params.asset,
                &token_program,
            ),
            liquidity: liquidity::pda::get_liquidity(),
            liquidity_program: LIQUIDITY_PROGRAM_ID,
            token_program,
            associated_token_program: ASSOCIATED_TOKEN_PROGRAM_ID,
            system_program: system_program::ID,
            instruction_sysvar: solana_program::sysvar::instructions::ID,
        })
        .args(args::FlashloanPayback {
            amount: payback_amount,
        })
        .instructions()?
        .remove(0);

    Ok(Flashloan {
        borrow_ix,
        payback_ix,
    })
}