@kamino-finance/klend-sdk
Version:
Typescript SDK for interacting with the Kamino Lending (klend) protocol
92 lines (86 loc) • 3.22 kB
text/typescript
/* eslint-disable @typescript-eslint/no-unused-vars */
import {
Address,
isSome,
AccountMeta,
AccountSignerMeta,
Instruction,
Option,
TransactionSigner,
} from "@solana/kit"
/* eslint-enable @typescript-eslint/no-unused-vars */
import BN from "bn.js" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as borsh from "@coral-xyz/borsh" // eslint-disable-line @typescript-eslint/no-unused-vars
import { borshAddress } from "../utils" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from "../types" // eslint-disable-line @typescript-eslint/no-unused-vars
import { PROGRAM_ID } from "../programId"
export const DISCRIMINATOR = Buffer.from([116, 174, 213, 76, 180, 53, 210, 144])
export interface RepayObligationLiquidityV2Args {
liquidityAmount: BN
}
export interface RepayObligationLiquidityV2Accounts {
repayAccounts: {
owner: TransactionSigner
obligation: Address
lendingMarket: Address
repayReserve: Address
reserveLiquidityMint: Address
reserveDestinationLiquidity: Address
userSourceLiquidity: Address
tokenProgram: Address
instructionSysvarAccount: Address
}
farmsAccounts: {
obligationFarmUserState: Option<Address>
reserveFarmState: Option<Address>
}
lendingMarketAuthority: Address
farmsProgram: Address
}
export const layout = borsh.struct<RepayObligationLiquidityV2Args>([
borsh.u64("liquidityAmount"),
])
export function repayObligationLiquidityV2(
args: RepayObligationLiquidityV2Args,
accounts: RepayObligationLiquidityV2Accounts,
remainingAccounts: Array<AccountMeta | AccountSignerMeta> = [],
programAddress: Address = PROGRAM_ID
) {
const keys: Array<AccountMeta | AccountSignerMeta> = [
{
address: accounts.repayAccounts.owner.address,
role: 2,
signer: accounts.repayAccounts.owner,
},
{ address: accounts.repayAccounts.obligation, role: 1 },
{ address: accounts.repayAccounts.lendingMarket, role: 0 },
{ address: accounts.repayAccounts.repayReserve, role: 1 },
{ address: accounts.repayAccounts.reserveLiquidityMint, role: 0 },
{ address: accounts.repayAccounts.reserveDestinationLiquidity, role: 1 },
{ address: accounts.repayAccounts.userSourceLiquidity, role: 1 },
{ address: accounts.repayAccounts.tokenProgram, role: 0 },
{ address: accounts.repayAccounts.instructionSysvarAccount, role: 0 },
isSome(accounts.farmsAccounts.obligationFarmUserState)
? {
address: accounts.farmsAccounts.obligationFarmUserState.value,
role: 1,
}
: { address: programAddress, role: 0 },
isSome(accounts.farmsAccounts.reserveFarmState)
? { address: accounts.farmsAccounts.reserveFarmState.value, role: 1 }
: { address: programAddress, role: 0 },
{ address: accounts.lendingMarketAuthority, role: 0 },
{ address: accounts.farmsProgram, role: 0 },
...remainingAccounts,
]
const buffer = Buffer.alloc(1000)
const len = layout.encode(
{
liquidityAmount: args.liquidityAmount,
},
buffer
)
const data = Buffer.concat([DISCRIMINATOR, buffer]).slice(0, 8 + len)
const ix: Instruction = { accounts: keys, programAddress, data }
return ix
}