@kamino-finance/kliquidity-sdk
Version:
Typescript SDK for interacting with the Kamino Liquidity (kliquidity) protocol
85 lines (80 loc) • 2.7 kB
text/typescript
/* eslint-disable @typescript-eslint/no-unused-vars */
import {
Address,
isSome,
IAccountMeta,
IAccountSignerMeta,
IInstruction,
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 interface SwapArgs {
amountIn: BN
minAmountOut: BN
}
export interface SwapAccounts {
lbPair: Address
binArrayBitmapExtension: Option<Address>
reserveX: Address
reserveY: Address
userTokenIn: Address
userTokenOut: Address
tokenXMint: Address
tokenYMint: Address
oracle: Address
hostFeeIn: Option<Address>
user: TransactionSigner
tokenXProgram: Address
tokenYProgram: Address
eventAuthority: Address
program: Address
}
export const layout = borsh.struct([
borsh.u64("amountIn"),
borsh.u64("minAmountOut"),
])
export function swap(
args: SwapArgs,
accounts: SwapAccounts,
programAddress: Address = PROGRAM_ID
) {
const keys: Array<IAccountMeta | IAccountSignerMeta> = [
{ address: accounts.lbPair, role: 1 },
isSome(accounts.binArrayBitmapExtension)
? { address: accounts.binArrayBitmapExtension.value, role: 0 }
: { address: programAddress, role: 0 },
{ address: accounts.reserveX, role: 1 },
{ address: accounts.reserveY, role: 1 },
{ address: accounts.userTokenIn, role: 1 },
{ address: accounts.userTokenOut, role: 1 },
{ address: accounts.tokenXMint, role: 0 },
{ address: accounts.tokenYMint, role: 0 },
{ address: accounts.oracle, role: 1 },
isSome(accounts.hostFeeIn)
? { address: accounts.hostFeeIn.value, role: 1 }
: { address: programAddress, role: 0 },
{ address: accounts.user.address, role: 2, signer: accounts.user },
{ address: accounts.tokenXProgram, role: 0 },
{ address: accounts.tokenYProgram, role: 0 },
{ address: accounts.eventAuthority, role: 0 },
{ address: accounts.program, role: 0 },
]
const identifier = Buffer.from([248, 198, 158, 145, 225, 117, 135, 200])
const buffer = Buffer.alloc(1000)
const len = layout.encode(
{
amountIn: args.amountIn,
minAmountOut: args.minAmountOut,
},
buffer
)
const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
const ix: IInstruction = { accounts: keys, programAddress, data }
return ix
}