Ark Minimun_gasFee Fix

[DanielEmmanuel1]

Implement Minimum Gas Validation and Message Cancellation with Unit Testing

Description

This PR fixes the lack of a minimum gas amount when making a cross-chain bridge by specifying a minimum value, which can be adjusted by the contract owner (team) as the gas situation changes.

Related Issue

Resolves issue #231

Changes Made

• Added custom error for minimum gas fee validation.
• Specified a minimum gas fee for bridging, adjustable by the contract owner as the gas situation evolves.
• Added a function to update the minimum gas and a function to get the current minimum gas.
• Emitted the MinimumGasFeeUpdated event upon changes.
• Added unit tests for the minimum gas requirement.
• Added unit tests for updating the minimum gas.

Impact

This change does not introduce any breaking changes but improves the user experience (UX) of the bridge. It protects users from sending messages with insufficient fees.

Testing

• Added new unit tests for minimum gas fee validation.
• Added unit tests for updating the minimum gas amount.
• All tests are passing successfully.

Screenshot

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