escrow-extension-generator

Escrow Program

SECURITY NOTICE: This program has not been audited. Use at your own risk. Not recommended for production use with real funds without a thorough security review.

Program ID

Escrowae7RaUfNn4oEZHywMXE5zWzYCXenwrCDaEoifg

Deployments

Network	Program ID
Devnet	Escrowae7RaUfNn4oEZHywMXE5zWzYCXenwrCDaEoifg

Overview

A configurable escrow program for Solana that enables receipt-based token deposits and withdrawals. Admins create escrows and allowlist specific mints, while depositors receive receipts that can be redeemed after optional lock mechanisms (e.g., timelocks, hooks, etc.) are satisfied.

Key Features

• Receipt-based deposits - Each deposit creates a unique receipt PDA for tracking
• Per-escrow mint allowlisting - Admins control which tokens can be deposited
• Token-2022 extension blocking - Optionally block mints with specific extensions (PermanentDelegate, NonTransferable, Pausable, etc.)
• Configurable timelocks - Set lock durations that must pass before withdrawals
• Custom hook programs - Invoke external programs pre/post deposit and withdrawal

Account Types

Account	PDA Seeds	Description
Escrow	["escrow", escrow_seed]	Main escrow config (admin, bump)
Receipt	["receipt", escrow, depositor, mint, receipt_seed]	Deposit record with amount and timestamp
AllowedMint	["allowed_mint", escrow, mint]	Marker that a mint is allowed
EscrowExtensions	["extensions", escrow]	TLV-encoded extensions (timelock, hook, blocked extensions)

Workflow

sequenceDiagram
    participant Admin
    participant Program
    participant Accounts

    Admin->>Program: CreatesEscrow
    Program->>Accounts: create Escrow PDA

    Admin->>Program: AllowMint
    Program->>Accounts: create AllowedMint PDA + Vault

    Admin-->>Program: AddTimelock (optional)
    Program-->>Accounts: create Extensions PDA

    Admin-->>Program: SetHook (optional)
    Program-->>Accounts: create Extensions PDA

sequenceDiagram
    participant Depositor
    participant Program
    participant Accounts

    Depositor->>Program: Deposit
    Program->>Accounts: transfer to Vault
    Program->>Accounts: create Receipt PDA

    Note over Depositor,Accounts: timelock passes

    Depositor->>Program: Withdraw
    Program->>Accounts: verify Receipt
    Program->>Accounts: verify Hooks
    Program->>Depositor: transfer tokens
    Program->>Accounts: close Receipt

Documentation

• Program Overview - Instructions, accounts, and technical reference
• CU Benchmarks - Compute unit usage per instruction
• Improvements - Possible future enhancements

Local Development

Prerequisites

• Rust
• Node.js (see .nvmrc)
• pnpm (see package.json packageManager)
• Solana CLI

All can be conveniently installed via the Solana CLI Quick Install.

Client Examples

Check out the TypeScript demo for a complete example of the escrow program in action.

Build & Test

# Install dependencies
just install

# Full build (IDL + clients + program)
just build

# Run integration tests
just integration-test

# Format and lint
just fmt

Tech Stack

• Pinocchio - Lightweight no_std Solana framework
• Codama - IDL-driven client generation
• LiteSVM - Fast local testing

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Built and maintained by the Solana Foundation.

Licensed under MIT. See LICENSE for details.

Support