@kamino-finance/klend-sdk
Version:
Typescript SDK for interacting with the Kamino Lending (klend) protocol
73 lines (67 loc) • 2.33 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([251, 10, 231, 76, 27, 11, 159, 96])
export interface InitObligationArgs {
args: types.InitObligationArgsFields
}
export interface InitObligationAccounts {
obligationOwner: TransactionSigner
feePayer: TransactionSigner
obligation: Address
lendingMarket: Address
seed1Account: Address
seed2Account: Address
ownerUserMetadata: Address
rent: Address
systemProgram: Address
}
export const layout = borsh.struct<InitObligationArgs>([
types.InitObligationArgs.layout("args"),
])
export function initObligation(
args: InitObligationArgs,
accounts: InitObligationAccounts,
remainingAccounts: Array<AccountMeta | AccountSignerMeta> = [],
programAddress: Address = PROGRAM_ID
) {
const keys: Array<AccountMeta | AccountSignerMeta> = [
{
address: accounts.obligationOwner.address,
role: 2,
signer: accounts.obligationOwner,
},
{ address: accounts.feePayer.address, role: 3, signer: accounts.feePayer },
{ address: accounts.obligation, role: 1 },
{ address: accounts.lendingMarket, role: 0 },
{ address: accounts.seed1Account, role: 0 },
{ address: accounts.seed2Account, role: 0 },
{ address: accounts.ownerUserMetadata, role: 0 },
{ address: accounts.rent, role: 0 },
{ address: accounts.systemProgram, role: 0 },
...remainingAccounts,
]
const buffer = Buffer.alloc(1000)
const len = layout.encode(
{
args: types.InitObligationArgs.toEncodable(args.args),
},
buffer
)
const data = Buffer.concat([DISCRIMINATOR, buffer]).slice(0, 8 + len)
const ix: Instruction = { accounts: keys, programAddress, data }
return ix
}