@kamino-finance/klend-sdk
Version:
Typescript SDK for interacting with the Kamino Lending (klend) protocol
69 lines (63 loc) • 2.34 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([145, 178, 13, 225, 76, 240, 147, 72])
export interface RepayObligationLiquidityArgs {
liquidityAmount: BN
}
export interface RepayObligationLiquidityAccounts {
owner: TransactionSigner
obligation: Address
lendingMarket: Address
repayReserve: Address
reserveLiquidityMint: Address
reserveDestinationLiquidity: Address
userSourceLiquidity: Address
tokenProgram: Address
instructionSysvarAccount: Address
}
export const layout = borsh.struct<RepayObligationLiquidityArgs>([
borsh.u64("liquidityAmount"),
])
export function repayObligationLiquidity(
args: RepayObligationLiquidityArgs,
accounts: RepayObligationLiquidityAccounts,
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.repayReserve, role: 1 },
{ address: accounts.reserveLiquidityMint, role: 0 },
{ address: accounts.reserveDestinationLiquidity, role: 1 },
{ address: accounts.userSourceLiquidity, role: 1 },
{ 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
}