Audit Request

Evai has engaged Certik and their meticulous testing and customised security integration to ensure the EVAI token meets the highest standards, providing piece of mind to investors and holders of the token. CertiK provides hacker-resistant smart contracts and blockchain audits to some of the industry's most established blockchain businesses, including The Ethereum Foundation, IBM, Binance, and Etherscan.

Audit Scope

CertiK Reports represent an extensive auditing process increasing the quality of utilised code while reducing the high level of risk presented by cryptographic tokens and blockchain technology.

Smart Contract Details

Review Methodology

CertiK Reports represent an extensive auditing process increasing the quality of utilised code while reducing the high level of risk presented by cryptographic tokens and blockchain technology.

The evaluation entails an organised collection of testing results, analysis and inferences made about the structure, implementation and overall best practices of a particular piece of source code.

Ethereum 2.0 switch from Proof of Work to Proof of Stake.

Below is a summary of how this would affect the current EVAI token and its current ERC20 status.

Ethereum 2.0 will be implemented over several phases. The first phase (phase 0), is already defined and practically fully implemented, just a few more tests are pending.

Phase 1 Impact (None): Neither ERC20 users nor ERC20 developers should notice any difference. However, the increase of data available will probably lead to the use of scaling solutions based on Layer 2 between applications that generate a huge amount of transactions of ERC20 tokens per second (such as decentralised exchanges and games). These solutions aren’t new - they are already being used today on Ethereum, however, on a minor scale.

Phase 1.5 Impact (Negligible): At this point changes will be noticeable when ERC20 tokens like EVAI are used as the transactions with ERC20 based tokens will be faster. The change to Proof of Stake implies that the block time is fixed to 12 seconds. Scalability solutions based on Layer 2 will also work better for ERC20.

Phase 2 Impact (Medium weight affect): For ERC20 tokens when Phase 2 is reached the proposed solutions would be deploying a smart contract similar to an ERC20 in all the shards. These “ERC20 2.0” would communicate with themselves among shards to synchronise the balances, so that when you want to use your EVAI tokens in another shard, you’d have to indicate to the token to which shard you want to send it to so that it can prepare itself. This solution could also be applied to the EVAI tokens that are already deployed on Ethereum 1.0 by creating smart contracts that wrap an EVAI token and add these properties. Something similar to how WETH works with ETH.

Summary of Findings

Total Issues: 17
Total Critical: 0
Total Major: 0
Total Medium: 2
Total Minor: 5
Total Informational: 10

HIGH Severity Issues: No high severity issues were identified in smart contract.
MEDIUM Severity Issues: No medium severity issues were identified in smart contract.
LOW Severity: No low severity issues were identified in smart contract.

Legal Disclaimer: Contributions/investment/trading in digital assets have a relatively high risk and may not match all types of investors. The value of a digital asset is very highly volatile. This could mean potential huge profits; this also could mean potential huge losses. EVAI Tokens are digital assets, so if you are interested in becoming a Evai contributor or investor, you must convince yourself of all aspects of Evai: technology, business models, and other related factors. You should be aware of the risks of failure will still exist. Evai cannot guarantee or be held responsible for any gains or losses from the performance of EVAI Token which will fully be determined by market, project and investment forces.

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