In this final project, you will be adding a freeze function to the token contract that we learned during the course. This feature allows a given token holder to freeze and later unfreeze their tokens. Frozen tokens cannot be transferred by the holder.

Note: These features must be added to the contract.rs file.

Steps

• Add two new functions to the token contract, freeze_account and unfreeze_account. Both functions must take an account address.
• The freeze_account function should freeze the tokens of the specified account. This temporarily prevents the transfer of tokens for a given account.
• The unfreeze_account function should unfreeze the tokens of the specified account. This re-enables the transfer of tokens of a given account.
• Update the transfer function to reject a transfer if an account's tokens are frozen.

Requirements:

• Submit your project to Stellar testnet and mention your contract address in your readme.md file
• Provide a README file describing how the project works and any new functionality added.