Chancer - Audit

CertiK30 May 2023Files named in the report

CertiK reviewed Chancer (Chancer - Audit) on 30 May 2023: 10 findings, 0 critical; 6 marked fixed, 1 acknowledged, 3 open.

No open critical findings

Open the report Open Chancer’s security record

Report hosted on skynet.certik.com.

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Findings10

Statuses are the security firm’s own, from its report.

Severity	Open	Acknowledged	Fixed
Critical	0	0	0
High	3	0	2
Medium	0	0	1
Low	0	1	3

HighCentralization Risks in CHRPresale.solOpen

In the contract `CHRPresale` the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority. ![](https://accelerator-tasks-prod.acc.corp.certik.com/91464524b30c4cc9a2a4d5b367f5f4d7/diagrams/centralization_CHRPresale-CHRPresale-_owner.svg)

HighInitial Token DistributionOpen

All `_initialSupply` amount of CHR tokens are sent to the contract deployer when deploying the contract. This is a potential centralization risk as the deployer can distribute CHR tokens without the consensus of the community.

HighLack of Checks for Presale Token SupplyOpen

The CHRPresale contract will transfer to users their purchase CHR tokens in function `claim`. However, the `IERC20(saleToken).balanceOf(CHRPresale)` is only checked in function `configureClaim`. The CHRPresale contract might not have enough sale token balance for users to claim, as the tokens can still be sold after the `claimStartTime` is configured.