Crate solana_accountgen 

solana-accountgen

A utility crate for generating mock Solana accounts for testing purposes.

Features

• Create accounts with custom balances, owners, and data using a fluent API
• Serialize account data using Borsh (with JSON support for the bincode module)
• Support for creating PDAs (Program Derived Addresses)
• Integration with solana-program-test for end-to-end testing
• Support for Anchor programs with discriminator handling

Example

use solana_accountgen::AccountBuilder;
use solana_pubkey::Pubkey;
use borsh::{BorshSerialize, BorshDeserialize};

#[derive(BorshSerialize, BorshDeserialize)]
struct MyData { value: u64 }

let program_id = Pubkey::new_unique();
let account = AccountBuilder::new()
    .balance(100_000_000)
    .owner(program_id)
    .data(MyData { value: 42 })
    .unwrap()
    .build();

Anchor Program Testing

solana-accountgen provides special support for testing Anchor programs:

use solana_accountgen::extensions::anchor::{create_anchor_account, create_anchor_instruction};
use solana_pubkey::Pubkey;
use borsh::{BorshSerialize, BorshDeserialize};
use solana_instruction::AccountMeta;

#[derive(BorshSerialize, BorshDeserialize)]
struct GameState {
    player: Pubkey,
    score: u64,
}

// Create an account with Anchor's discriminator
let program_id = Pubkey::new_unique();
let player = Pubkey::new_unique();
let game_state = GameState {
    player,
    score: 100,
};

let account = create_anchor_account(
    "game",  // Account type name in Anchor program
    program_id,
    game_state,
    100_000, // lamports
).unwrap();

// Create an instruction with Anchor's method discriminator
let ix = create_anchor_instruction(
    program_id,
    "update_score",  // Method name in Anchor program
    vec![
        AccountMeta::new(Pubkey::new_unique(), false),
        AccountMeta::new_readonly(player, true),
    ],
    42u64, // Instruction data
).unwrap();

Re-exports

pub use borsh;

Modules

extensions

Extensions for specific account types and testing scenarios.

serialization

Serialization support for different formats.

Structs

AccountBuilder

A builder for creating mock Solana accounts for testing purposes.

AccountMap

A collection of accounts indexed by their pubkeys.

Enums

AccountGenError

Errors that can occur when using the AccountBuilder.

Functions

create_account

Creates an account with the given pubkey and properties.

create_accounts

Creates multiple accounts with their pubkeys.