Integration tests for EIP 1559 transactions

Author: simolus3

tool/integration_test.dart

@@ -92,6 +92,38 @@ void main() {
     );
   });
 
+  test('EIP-1559 transactions', () async {
+    final firstAddress = await first.extractAddress();
+    final secondAddress = await second.extractAddress();
+
+    final balanceOfFirst = await client.getBalance(firstAddress);
+    final balanceOfSecond = await client.getBalance(secondAddress);
+    final value = BigInt.from(1337);
+
+    final hash = await client.sendTransaction(
+      first,
+      Transaction(
+        to: secondAddress,
+        value: EtherAmount.inWei(value),
+        maxFeePerGas: EtherAmount.inWei(BigInt.one),
+        maxPriorityFeePerGas: EtherAmount.inWei(BigInt.two),
+      ),
+    );
+
+    expect((await client.getBalance(firstAddress)).getInWei,
+        balanceOfFirst.getInWei - value);
+    expect((await client.getBalance(secondAddress)).getInWei,
+        balanceOfSecond.getInWei + value);
+
+    final receipt = await client.getTransactionReceipt(hash);
+    expect(
+      receipt,
+      isA<TransactionReceipt>()
+          .having((e) => e.to, 'to', secondAddress)
+          .having((e) => e.from, 'from', first.address),
+    );
+  });
+
   test('getTransactionReceipt returns null for unknown transactions', () {
     expect(client.getTransactionReceipt('0x123'), completion(isNull));
   });