/solana_pdas

Solana PDA #rust #solana

Primary LanguageRust

Solana PDAs Example

This Solana program demonstrates the use of Program Derived Addresses (PDAs) in Anchor. It provides functionality to create a bank account, deposit funds, and withdraw funds securely, using Anchor's framework for Solana.

Features

  • Create a bank account tied to a user's wallet.
  • Deposit funds into the bank account.
  • Withdraw funds from the bank account, with checks on ownership and rent exemption.

Program Overview

The program consists of three core functions:

  1. create: Initializes a new bank account associated with the user's wallet, assigning a name, an initial balance of 0, and the user as the owner.
  2. deposit: Transfers funds from the user's wallet into the bank account, updating the balance.
  3. withdraw: Allows the user to withdraw funds from the bank, with ownership checks and checks for sufficient rent to avoid account deletion.

PDA Mechanism

Program Derived Addresses (PDAs) are used to create secure, deterministic addresses based on program logic. In this program, the bank account is created using a PDA based on the user's public key and a constant seed.

Example PDA Creation

#[account(
    init, 
    payer = user, 
    space = 5000, 
    seeds = [b"bankaccount", user.key().as_ref()], 
    bump
)]
pub bank: Account<'info, Bank>,