@kamino-finance/kliquidity-sdk/src/whirlpools-client/instructions/initializePool.ts

Typescript SDK for interacting with the Kamino Liquidity (kliquidity) protocol

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 InitializePoolArgs {
  bumps: types.WhirlpoolBumpsFields
  tickSpacing: number
  initialSqrtPrice: BN
}

export interface InitializePoolAccounts {
  whirlpoolsConfig: PublicKey
  tokenMintA: PublicKey
  tokenMintB: PublicKey
  funder: PublicKey
  whirlpool: PublicKey
  tokenVaultA: PublicKey
  tokenVaultB: PublicKey
  feeTier: PublicKey
  tokenProgram: PublicKey
  systemProgram: PublicKey
  rent: PublicKey
}

export const layout = borsh.struct([
  types.WhirlpoolBumps.layout("bumps"),
  borsh.u16("tickSpacing"),
  borsh.u128("initialSqrtPrice"),
])

export function initializePool(
  args: InitializePoolArgs,
  accounts: InitializePoolAccounts,
  programId: PublicKey = PROGRAM_ID
) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.whirlpoolsConfig, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenMintA, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenMintB, isSigner: false, isWritable: false },
    { pubkey: accounts.funder, isSigner: true, isWritable: true },
    { pubkey: accounts.whirlpool, isSigner: false, isWritable: true },
    { pubkey: accounts.tokenVaultA, isSigner: true, isWritable: true },
    { pubkey: accounts.tokenVaultB, isSigner: true, isWritable: true },
    { pubkey: accounts.feeTier, isSigner: false, isWritable: false },
    { pubkey: accounts.tokenProgram, isSigner: false, isWritable: false },
    { pubkey: accounts.systemProgram, isSigner: false, isWritable: false },
    { pubkey: accounts.rent, isSigner: false, isWritable: false },
  ]
  const identifier = Buffer.from([95, 180, 10, 172, 84, 174, 232, 40])
  const buffer = Buffer.alloc(1000)
  const len = layout.encode(
    {
      bumps: types.WhirlpoolBumps.toEncodable(args.bumps),
      tickSpacing: args.tickSpacing,
      initialSqrtPrice: args.initialSqrtPrice,
    },
    buffer
  )
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len)
  const ix = new TransactionInstruction({ keys, programId, data })
  return ix
}