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Hydrogen Snowflake security audit

Hydrogen Snowflake security audit report


This is the report from a security audit performed on HydroBlockchain by gorbunovperm.

A smart contract that enables identity-management under ERC 1484 and enables various types of transfers of HYDRO tokens.

In scope

Commit hash 90389befae1fcbca015f1257bf9d5ac5eccd302a

  1. Snowflake.sol


In total, 3 issues were reported including:

  • 0 high severity issue.

  • 0 medium severity issues.

  • 1 low severity issues.

  • 2 minor observations.

Security issues

1. Known vulnerabilities of ERC-20 token

Severity: low


  • It is possible to double withdrawal attack. More details here

  • Lack of transaction handling mechanism issue. WARNING! This is a very common issue and it already caused millions of dollars losses for lots of token users! More details here


Add into a function transfer(address _to, ... ) following code:

require( _to != address(this) );

2. identityExists modifier error message.

Severity: minor observation

Code snippet


In case if check variable is false an error message should be "The EIN exists.". But now in any case shows the message "The EIN does not exist.".

3. _transfer function always returns false.

Severity: minor observation

Code snippet


Return value is non-initialized.


There is no serious vulnerabilities were found here.

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