@marinade.finance/kamino-sdk/src/whirpools-client/instructions/openPosition.ts

Kamino SDK

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 '@project-serum/borsh'; // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from '../types'; // eslint-disable-line @typescript-eslint/no-unused-vars
import { WHIRLPOOL_PROGRAM_ID } from '../programId';

export interface OpenPositionArgs {
  bumps: types.OpenPositionBumpsFields;
  tickLowerIndex: number;
  tickUpperIndex: number;
}

export interface OpenPositionAccounts {
  funder: PublicKey;
  owner: PublicKey;
  position: PublicKey;
  positionMint: PublicKey;
  positionTokenAccount: PublicKey;
  whirlpool: PublicKey;
  tokenProgram: PublicKey;
  systemProgram: PublicKey;
  rent: PublicKey;
  associatedTokenProgram: PublicKey;
}

export const layout = borsh.struct([
  types.OpenPositionBumps.layout('bumps'),
  borsh.i32('tickLowerIndex'),
  borsh.i32('tickUpperIndex'),
]);

export function openPosition(args: OpenPositionArgs, accounts: OpenPositionAccounts) {
  const keys: Array<AccountMeta> = [
    { pubkey: accounts.funder, isSigner: true, isWritable: true },
    { pubkey: accounts.owner, isSigner: false, isWritable: false },
    { pubkey: accounts.position, isSigner: false, isWritable: true },
    { pubkey: accounts.positionMint, isSigner: true, isWritable: true },
    {
      pubkey: accounts.positionTokenAccount,
      isSigner: false,
      isWritable: true,
    },
    { pubkey: accounts.whirlpool, 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 },
    {
      pubkey: accounts.associatedTokenProgram,
      isSigner: false,
      isWritable: false,
    },
  ];
  const identifier = Buffer.from([135, 128, 47, 77, 15, 152, 240, 49]);
  const buffer = Buffer.alloc(1000);
  const len = layout.encode(
    {
      bumps: types.OpenPositionBumps.toEncodable(args.bumps),
      tickLowerIndex: args.tickLowerIndex,
      tickUpperIndex: args.tickUpperIndex,
    },
    buffer
  );
  const data = Buffer.concat([identifier, buffer]).slice(0, 8 + len);
  const ix = new TransactionInstruction({ keys, programId: WHIRLPOOL_PROGRAM_ID, data });
  return ix;
}