@kamino-finance/klend-sdk
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Typescript SDK for interacting with the Kamino Lending (klend) protocol
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text/typescript
import { TransactionInstruction, PublicKey, AccountMeta } from "@solana/web3.js" // eslint-disable-line @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 * as types from "../types" // eslint-disable-line @typescript-eslint/no-unused-vars
import { PROGRAM_ID } from "../programId"
export interface BorrowObligationLiquidityArgs {
liquidityAmount: BN
}
export interface BorrowObligationLiquidityAccounts {
owner: PublicKey
obligation: PublicKey
lendingMarket: PublicKey
lendingMarketAuthority: PublicKey
borrowReserve: PublicKey
borrowReserveLiquidityMint: PublicKey
reserveSourceLiquidity: PublicKey
borrowReserveLiquidityFeeReceiver: PublicKey
userDestinationLiquidity: PublicKey
referrerTokenState: PublicKey
tokenProgram: PublicKey
instructionSysvarAccount: PublicKey
}
export const layout = borsh.struct([borsh.u64("liquidityAmount")])
export function borrowObligationLiquidity(
args: BorrowObligationLiquidityArgs,
accounts: BorrowObligationLiquidityAccounts,
programId: PublicKey = PROGRAM_ID
) {
const keys: Array<AccountMeta> = [
{ pubkey: accounts.owner, isSigner: true, isWritable: false },
{ pubkey: accounts.obligation, isSigner: false, isWritable: true },
{ pubkey: accounts.lendingMarket, isSigner: false, isWritable: false },
{
pubkey: accounts.lendingMarketAuthority,
isSigner: false,
isWritable: false,
},
{ pubkey: accounts.borrowReserve, isSigner: false, isWritable: true },
{
pubkey: accounts.borrowReserveLiquidityMint,
isSigner: false,
isWritable: true,
},
{
pubkey: accounts.reserveSourceLiquidity,
isSigner: false,
isWritable: true,
},
{
pubkey: accounts.borrowReserveLiquidityFeeReceiver,
isSigner: false,
isWritable: true,
},
{
pubkey: accounts.userDestinationLiquidity,
isSigner: false,
isWritable: true,
},
{ pubkey: accounts.referrerTokenState, isSigner: false, isWritable: true },
{ pubkey: accounts.tokenProgram, isSigner: false, isWritable: false },
{
pubkey: accounts.instructionSysvarAccount,
isSigner: false,
isWritable: false,
},
]
const identifier = Buffer.from([121, 127, 18, 204, 73, 245, 225, 65])
const buffer = Buffer.alloc(1000)
const len = layout.encode(
{
liquidityAmount: args.liquidityAmount,
},
buffer
)
const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
const ix = new TransactionInstruction({ keys, programId, data })
return ix
}