Feature: Integration Tests

[sephynox]

High Level Overview of Change

Adds integration tests.

Context of Change

Adds integration tests that connect to the XRPL testnets. Additionally, fixes NFT support which was broken.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Tests (You added tests for code that already exists, or your new feature included in this PR)
• Documentation Updates
• Release

Test Plan

Integration tests added.

[LimpidCrypto]

Please change the base of this PR to dev

[LimpidCrypto]

I assume this fails because we are sending too many requests at once to the faucet URL. Instead we could just have one faucet wallet for testing the transactions which we initialize only once using tokio::sync::OnceCell:

    static CLIENT: tokio::sync::OnceCell<AsyncJsonRpcClient> = tokio::sync::OnceCell::const_new();
    static WALLET: tokio::sync::OnceCell<Wallet> = tokio::sync::OnceCell::const_new();

    async fn get_client() -> &'static AsyncJsonRpcClient {
        CLIENT
            .get_or_init(|| async {
                AsyncJsonRpcClient::connect(Url::parse(XRPL_TEST_NET).unwrap())
            })
            .await
    }
    async fn get_wallet() -> &'static Wallet {
        WALLET
            .get_or_init(|| async {
                generate_faucet_wallet(get_client().await, None, None, None, None)
                    .await
                    .expect("Failed to generate and fund wallet")
            })
            .await
    }

Then we would have the problem, as the tests run all at once and are using the same wallet, causing the transaction all to use the same sequence. So we would maybe need a central function to call and await all these transaction tests like so:

    #[tokio::test]
    async fn test_transactions() {
        test_account_set_transaction().await;
        test_offer_create_transaction().await;
        test_transaction_with_memo().await;
        test_trust_set_transaction().await;
        test_offer_cancel_transaction().await;
    }