Security Audits

This page documents the various third-party security audits conducted on Threshold Network components, including tBTC bridge, staking contracts, the vending machines, thUSD, and integrations.

Protocol Upgrades

Defense by Thesis - Gasless Minting Feature for the Threshold App

Date: 31 Oct 2025

Report: View PDF

Scope: NativeBTCDepositor contract

Defense by Thesis - Beta Staker Allowlist & Bridge Fee Rebates

• Date: 16 Sept 2025

• Report: View PDF

• Scope: See related proposals, TIP-067 and TIP-106

Cross-Chain Integrations

Certora - Threshold CCIP Update

• Date: 25 Sept 2025

• Report: View PDF

• Scope: Threshold CCIP Update

MixBytes() - Cross-Chain Redemptions

• Date: 08 Sept 2025

• Report: View PDF

• Scope: Cross-chain bridge transfers

Zellic – Sui Integration (tBTC)

• Date: 01 May 2025

• Report: View PDF

• Scope: tBTC integration with the Sui blockchain

Hashlock – Starknet Integration (tBTC)

• Date: April 2025

• Report: View PDF

• Scope: tBTC integration with the StarkNet blockchain

Thesis Defense – Base Integration (tBTC)

• Date: April 11th, 2024

• Report: View PDF

• Scope: tBTC integration with the Base blockchain

tBTC Bridge Audits

Thesis Defense – T Staking Rebates for tBTC

• Date: 27 November 2025

• Report: View Audit 1 PDF - View Audit 2 PDF

• Scope: Smart contracts for T staking rebates

Least Authority – Solana Smart Contracts (tBTC)

• Date: 29 August 2023

• Report: View Audit PDF - Link to Least Authority

• Scope: Smart contracts for the tBTC Bridge on Solana

Least Authority – tBTC Bridge

• Date: 29 September 2022

• Report: View Audit PDF - Link to Least Authority

• Scope: Security audit of the core tBTC Bridge contracts

T Vending Machine Audits

CertiK – Vending Machine

• Date: 19 November 2021

• Report: View Audit PDF - Link to CertiK

• Scope: Vending machine security audit

ChainSecurity – Staking, T Token, and Vending Machine

• Date: 09 November 2021

• Report: View Audit PDF - Link to ChainSecurity

• Scope: Staking contracts, T token logic, and vending machine mechanisms