SOLbin Completes Master Security Audit

Security Score: 94/100 — Production Ready ✅

We just completed a comprehensive multi-chain security audit across our entire infrastructure — Solana, BNB Chain, Avalanche, Tron, Bitcoin, and Dogecoin. Every identified vulnerability has been patched and verified directly in source code.

What Was Fixed and Verified

Dogecoin Burn Address Isolation

The Dogecoin burn address has been replaced with a provably-unspendable sink. Burned DOGE is permanently destroyed — it can never be recovered by anyone, and it's completely isolated from the fee vault. The address uses a hash160 with no corresponding secp256k1 private key, making it cryptographically guaranteed unspendable.

Zero-Address Rejection (EVM + Tron)

Transfers to address(0) are now blocked at the server validation gate before a transaction is ever constructed. This prevents permanent fund loss on all EVM chains (BNB, Ethereum, Avalanche, Robinhood) and Tron. The check runs before regex format validation, so it cannot be bypassed by a well-formed zero address.

BEP-20 Contract Existence Validation

The system now verifies a token contract is actually deployed on BNB Chain before encoding transfer calls. This prevents gas-burn attacks where a user accidentally sends to a non-existent contract address, wasting gas fees on a transaction that would fail silently.

BigInt Precision for SPL Token Scaling

High-decimal tokens (Token-2022, up to 18 decimals) now use integer-only BigInt math for amount conversion. This completely eliminates floating-point truncation and precision loss that could occur with the previous Number-based conversion. Every token transfer is now calculated with exact integer arithmetic.

Fail-Closed Balance Checking (All 7 Chains)

If the balance oracle is unavailable due to RPC downtime on any of our 7 chain handlers, the transaction is rejected for safety — it's never allowed through without verification. Previously, a null balance response could let insufficient-balance transactions slip through. Now the system fails closed every time.

Tron Keypair Ownership Verification

Before any signing operation on Tron, the system verifies the transaction owner address matches the address derived from the loaded keypair. This blocks cross-owner signing attacks where a caller might attempt to sign a transaction for a different owner address.

Our Core Security Architecture

Non-Custodial — Your private keys are encrypted on your device using AES-256-GCM with a PIN-derived PBKDF2 key. They never transmit to our servers. All signing happens client-side.

Server-Authoritative Fee Vaults — Fee addresses and percentages are resolved server-side from on-chain configuration. Client-supplied values are never trusted. The client receives the authoritative vault and fee from the server response and uses those to build the transaction.

HMAC Nonce Replay Protection — Every signing request requires a single-use, cryptographically signed nonce with a 30-second TTL. Intercepted or replayed calls are instantly void. The nonce is bound to the user's session and the specific action being requested.

5-Layer Pre-Flight Validation — Every outbound transaction passes through five validation layers before the client builds and signs: global kill-switch, per-user cooldown, server-authoritative vault resolution, value caps and fee sanity, and balance re-verification.

Rotating Proxy Infrastructure — Our RPC calls route through a pool of 50+ rotating HTTP proxies with automatic ban detection (403/429/430/451) and dead-endpoint pruning. Failed proxies are removed from the database automatically.

Final Verdict

No critical or high-severity vulnerabilities remain open. SOLbin is approved for production deployment.

Security Health Score: 94/100

The 6-point deduction reflects an architectural note around HMAC nonce single-use tracking being in-memory per-isolate rather than cross-isolate. The 30-second TTL window and purpose-binding make practical exploitation effectively impossible.

SOLbin is production-ready. Your funds are secure.