Solanashreyvats01/solana-programs

Solana On-Chain Programs

A set of Rust programs on Solana covering a tokenized vault (ERC-4626 style), a two-party token escrow, and delegated spending allowances.

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RustSolanaAnchorSPL Token

Overview

To understand how Solana handles state and account permissions on-chain, I implemented several core financial primitives in Rust. The repository includes a vault program modeled after Ethereum's ERC-4626 standard, an escrow program for atomic token swaps, and an allowance program for delegated token transfers.

How it works

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Vault & Escrow PDAsAnchor / SPL Token

Architecture · Vault & Escrow PDAs

Anchor / SPL Token

02 · SOLANA PROGRAMVault & Escrow PDA AuthorityValidates seeds = [b"vault", mint.key(), bump] and computes shares.

Implementation details

01.

PDA vault custody

Each vault and escrow state account uses deterministic Program Derived Addresses (PDAs) as token authority, so only the program itself can sign outgoing SPL token transfers.

02.

Checked integer math for vault shares

Calculating deposit shares and withdrawal amounts uses checked arithmetic in Rust to prevent integer overflow or rounding bugs.

03.

Explicit account constraints

Every instruction verifies token mint ownership, signer privileges, and account relationships before modifying balances.