@kamino-finance/klend-sdk
Version:
Typescript SDK for interacting with the Kamino Lending (klend) protocol
77 lines (71 loc) • 2.76 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([121, 127, 18, 204, 73, 245, 225, 65])
export interface BorrowObligationLiquidityArgs {
liquidityAmount: BN
}
export interface BorrowObligationLiquidityAccounts {
owner: TransactionSigner
obligation: Address
lendingMarket: Address
lendingMarketAuthority: Address
borrowReserve: Address
borrowReserveLiquidityMint: Address
reserveSourceLiquidity: Address
borrowReserveLiquidityFeeReceiver: Address
userDestinationLiquidity: Address
referrerTokenState: Option<Address>
tokenProgram: Address
instructionSysvarAccount: Address
}
export const layout = borsh.struct<BorrowObligationLiquidityArgs>([
borsh.u64("liquidityAmount"),
])
export function borrowObligationLiquidity(
args: BorrowObligationLiquidityArgs,
accounts: BorrowObligationLiquidityAccounts,
remainingAccounts: Array<AccountMeta | AccountSignerMeta> = [],
programAddress: Address = PROGRAM_ID
) {
const keys: Array<AccountMeta | AccountSignerMeta> = [
{ address: accounts.owner.address, role: 2, signer: accounts.owner },
{ address: accounts.obligation, role: 1 },
{ address: accounts.lendingMarket, role: 0 },
{ address: accounts.lendingMarketAuthority, role: 0 },
{ address: accounts.borrowReserve, role: 1 },
{ address: accounts.borrowReserveLiquidityMint, role: 0 },
{ address: accounts.reserveSourceLiquidity, role: 1 },
{ address: accounts.borrowReserveLiquidityFeeReceiver, role: 1 },
{ address: accounts.userDestinationLiquidity, role: 1 },
isSome(accounts.referrerTokenState)
? { address: accounts.referrerTokenState.value, role: 1 }
: { address: programAddress, role: 0 },
{ address: accounts.tokenProgram, role: 0 },
{ address: accounts.instructionSysvarAccount, 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
}