SHELTERZ Info
At the beginning of 2022, when there was a shortage of OTA (booking services) in the Russian Federation, we decided to strengthen our website and tried to figure out how to increase the LTV (returnability) of customers so that they always book hotels only with us. We have come up with a loyalty system that gives not just a banal cashback of 10-15-20%, but which will produce the effect of a "miracle" and return all the money spent to customers. We decided to share the profits with our users and came up with a multi-level system of algorithms that takes into account behavioral factors, elements of the pension system, factors of engagement and activity, which distributes points in such a way as to gradually provide 100% cashback to each participant. We saw good business results, LTV grew 5 times, and we began to fully load our hotels through our website. So we decided to create a booking service from it and connect with other hotels there.
TrustNet Score
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Summary and Final Words
No crucial issues found
The contract does not contain issues of high or medium criticality. This means that no known vulnerabilities were found in the source code.
Contract owner can mint
It is possible to mint new tokens.
Contract owner cannot blacklist addresses.
It is not possible to lock user funds by blacklisting addresses.
Contract owner cannot set high fees
The fees, if applicable, can be a maximum of 25% or lower. The contract can therefore not be locked. Please take a look in the comment section for more details.
Contract cannot be locked
Owner cannot lock any user funds.
Token cannot be burned
There is no burning within the contract without any allowances
Ownership is not renounced
The owner retains significant control, which could potentially be used to modify key contract parameters.
Scope of Work
This audit encompasses the evaluation of the files listed below, each verified with a SHA-1 Hash. The team referenced above has provided the necessary files for assessment.
The auditing process consists of the following systematic steps:
- Specification Review: Analyze the provided specifications, source code, and instructions to fully understand the smart contract's size, scope, and functionality.
- Manual Code Examination: Conduct a thorough line-by-line review of the source code to identify potential vulnerabilities and areas for improvement.
- Specification Alignment: Ensure that the code accurately implements the provided specifications and intended functionalities.
- Test Coverage Assessment: Evaluate the extent and effectiveness of test cases in covering the codebase, identifying any gaps in testing.
- Symbolic Execution: Analyze the smart contract to determine how various inputs affect execution paths, identifying potential edge cases and vulnerabilities.
- Best Practices Evaluation: Assess the smart contracts against established industry and academic best practices to enhance efficiency, maintainability, and security.
- Actionable Recommendations: Provide detailed, specific, and actionable steps to secure and optimize the smart contracts.
A file with a different Hash has been intentionally or otherwise modified after the security review. A different Hash may indicate a changed condition or potential vulnerability that was not within the scope of this review.
Final Words
The following provides a concise summary of the audit report, accompanied by insightful comments from the auditor. This overview captures the key findings and observations, offering valuable context and clarity.
Owner can mint new tokens
Tokens can be burned only if the caller has allowance
Files and details
Functions
public
/
State variables
public
/
Total lines
of code
/
Capabilities
Hover on items
/
Findings and Audit result
low Issues | 2 findings
Pending
#1 low Issue
Local variables shadowing (shadowing-local)
Rename the local variables that shadow another component.
Pending
#2 low Issue
Old compiler version
Old solidity versions have known vulnerabilities and it's not recommended to use them. We recommend using the latest compiler version
informational Issues | 1 findings
Pending
#1 informational Issue
Functions that are not used (dead-code)
Remove unused functions.