Security Audits
Audits of Gnosis Chain and Related Infrastructure
Most Audits were completed prior to the rebrand from xDai Chain to Gnosis Chain, and will refer to the xDai chain as well as the STAKE token, the previous governance token of the chain (the chain is in the process of transferring to GNO-only security).

Stake Beacon Chain by ChainSecurity

Completed: October 1, 2021
Conclusion: During the assessment one critical issue was found and fixed following the intermediate report. The remaining issues were of low severity and were fixed accordingly. The communication with the team was very responsive.

OmniBridge v6.0 Smart Contracts Audit by ChainSecurity

Completed: September 7, 2021
Conclusion: The assessment uncovered a number of potential issues which were resolved by the team. Two additional issues were acknowledged and largely mitigated by the team, and the original severities are no longer applicable. These upgrades to the Omnibridge provide additional functionality which will be implemented in the future.
ChainSecurity_POA_Network_Omnibridge_Version_6_0_audit.pdf
537KB
PDF
ChainSecurity OmniBridge v6.0

POSDAO Audit by ChainSecurity

Completed: June 25, 2021
Conclusion: The assessment uncovered several issues which were addressed or acknowledged by the team. No "critical" severity security flaws preventing continued usage or launch of contracts in future contexts were found. 0 Critical Issues, 1 High Risk Issue Accepted, 4 Medium Issues Accepted/Acknowledged, 4 Low Risk Issues Accepted/Acknowledged.
ChainSecurity
Chainsecurity

OmniBridge Audit by ChainSecurity

Completed: April 27, 2021
Conclusion: 0 Critical or High Risk Issues, 2 Medium Issues Accepted, 3 Low Risk Issues Accepted/Acknowledged
ChainSecurity
Chainsecurity
ChainSecurity Audit Report

TokenBridge Audit by Quantstamp (covers OmniBridge)

Completed: November 6, 2020
Conclusion: No high and medium risk issues found, all low risk issues addressed.
Contracts: Revised in version 5.5.0-rc0 to address audit. https://github.com/poanetwork/tokenbridge-contracts/releases/tag/5.5.0-rc0​

EasyStaking Audit by Quantstamp

Completed: August 3, 2020
Conclusion: All high/medium/low risk issues resolved.
XDai Easy Staking - Final Report.pdf
365KB
PDF
Easy Staking Final Audit Report by Quantstamp

TokenBridge Audit by Quantstamp (covers xDai bridge functionality)

Completed: January 8, 2020
Conclusion: All high risk issues resolved and low risk issues addressed. More information available in this post.
Contracts: Revised in version 3.3.0 to address audit. https://github.com/poanetwork/tokenbridge-contracts/releases/tag/3.3.0​

STAKE Token Distribution by Quantstamp

STAKE Token Distribution Audit

Completed: June 24, 2020 Conclusion: No High or Medium risks, all low and informational risks addressed

DPOS Audit

In the original audit, the working name for the staking token was DPOS. This changed to STAKE.
DPOS Audit Completed: September 5, 2019 Conclusion: All risks resolved. Contracts: Version 1.0.1 addressed items in audit. https://github.com/xdaichain/stake-token/releases/tag/v1.0.1​
The token constitutes a VFA in terms of Maltese law. Please contact [email protected] to request access to the document.

POSDAO Initial Security Audit by PepperSec

Completed: August 2019
Conclusion: All issues fixed or addressed. Due to scalability concerns, teams created a new methodology to accumulate and later β€œpull” their stakes and rewards instead of the β€œpush” strategy as implemented in the audited version of the contracts.
Contracts: Version 0.1.0 addresses issues present in audit. https://github.com/poanetwork/posdao-contracts/releases/tag/v0.1.0​