v0.3.4

Release version 0.3.4

Release Notes

• Removed unused functions from data
• Changed string literals to constants
• Fixed refund mechanism
• Added timing checks
• Added event_types to events
• Removed unused comment
• Added checks for subtraction underflow
• Renamed shadowed variables
• Fixed naming

What else Changed

• Audit fixes by @tyshkor in #8

Full Changelog: v0.3.3...v0.3.4