[feat] Emit event when user withdraw fund's balance

[MPSxDev]

Pull Request

• Closes [feat] Emit event when user withdraw fund's balance #139
• Added tests (if necessary)
• Run tests
• Run formatting
• Commented the code

Changes description

This PR adds DonationWithdraw event for fn withdraw in fund.cairo file, using owner_address as the key and withdrawn_amount as the data.

Current output

The example output is:

"events": [
    {
      "from_address": "0x27d07155a12554d4fd785d0b6d80c03e433313df03bb57939ec8fb0652dbe79", //Contract Address
      "keys": [
        "0x426f6f6b4164646564",  // selector!("DonationWithdraw")
        "0x27d070b6db5703e433313df0939ec8fb0680c155a12554d4fd785d3b52dbe79" // Owner address
      ],
      "data": [
        "0x208b7fff7fff7ffe", //withdrawn_amount (u256 STRK)
      ]
    }
  ]

Where:

• first key = selector!("DonationWithdraw")
• second key = Owner address
• data = withdrawn_amount

Event Struct:

    pub struct DonationWithdraw {
        #[key]
        pub owner_address: ContractAddress,
        pub withdrawn_amount: u256
    }

Time spent breakdown

2 hours aprox spent

Comments

I look forward to any comments or questions.

[EmmanuelAR]

Excellent work @MPSxDev, some request changes!

[MPSxDev]

Excellent work @MPSxDev, some request changes!

Thank you @EmmanuelAR. I completed all the requested changes.

[EmmanuelAR]

LGTM! Excellent!