Root + Impact

Description

• Internal utility functions should be marked as public when only called by other contract functions to maintain proper access control

• The get_random_slice() function is marked as public entry but is only used internally by claim_slice(), allowing unnecessary external calls

Risk

Likelihood:

• External actors can directly call get_random_slice() without going through proper claim mechanics

• Direct calls consume gas and provide no meaningful functionality to external callers

Impact:

• Unnecessary gas expenditure for external callers who invoke the function directly

• Potential confusion about contract interface and intended usage patterns

Proof of Concept

The public entry modifier makes the function callable by external transactions, but the function only returns a random number without any state changes or meaningful operations. External callers waste gas calling a function that provides no benefit outside the internal contract logic.

Recommended Mitigation

Removing the entry modifier prevents direct external calls while maintaining internal accessibility. The public visibility allows claim_slice() to call the function internally, but external transactions cannot invoke it directly. This follows the principle of least privilege by restricting function access to its intended usage pattern.