hyperledger-solang_solang/tests/polkadot_tests/calls.rs

// SPDX-License-Identifier: Apache-2.0

use crate::{build_solidity, build_solidity_with_options};
use parity_scale_codec::{Decode, Encode};
use primitive_types::U256;
use solang::codegen::revert::{PanicCode, SolidityError};

#[derive(Debug, PartialEq, Eq, Encode, Decode)]
struct RevertReturn(u32, String);

#[test]
fn revert() {
    let mut runtime = build_solidity(
        r#"
        contract bar {
            function test() public {
                revert("yo!");
            }

            function a() public {
                b();
            }

            function b() public {
                c();
            }

            function c() public {
                d();
            }

            function d() public {
                revert("revert value has to be passed down the stack");
            }
        }"#,
    );

    runtime.function_expect_failure("test", Vec::new());

    assert_eq!(runtime.output().len(), 4 + "yo!".to_string().encode().len());

    runtime.function_expect_failure("a", Vec::new());

    let expected_error = (
        0x08c379a0u32.to_be_bytes(), // "selector" of "Error(string)"
        "revert value has to be passed down the stack".to_string(),
    );
    assert_eq!(runtime.output(), expected_error.encode());

    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                revert();
            }
        }"##,
    );

    runtime.function_expect_failure("test", Vec::new());

    assert_eq!(runtime.output().len(), 0);
}

#[test]
fn require() {
    let msg = "Program testing can be used to show the presence of bugs, but never to show their absence!".to_string();
    let src = format!(
        r#"contract c {{
            function test1() public pure {{
                require(false, "{}");
            }}

            function test2() public pure {{
                require(true, "{}");
            }}
        }}"#,
        &msg, &msg
    );
    let mut runtime = build_solidity(&src);

    runtime.function_expect_failure("test1", Vec::new());
    let selector = 0x08c379a0u32.to_be_bytes();
    assert_eq!(runtime.output(), (selector, msg).encode());

    runtime.function("test2", Vec::new());
    assert_eq!(runtime.output().len(), 0);
}

#[test]
fn input_wrong_size() {
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test(int32 x) public {
            }
        }"##,
    );

    runtime.function_expect_failure("test", b"A".to_vec());

    // the decoder does check if there is too much data
    runtime.function_expect_failure("test", b"ABCDE".to_vec());
}

#[test]
fn external_call_not_exist() {
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                other o = other(address(102));

                o.test();
            }
        }

        contract other {
            function test() public {

            }
        }"##,
    );

    runtime.function_expect_failure("test", Vec::new());
}

#[test]
fn contract_already_exists() {
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                other o = new other{salt: 0}();

                other t = new other{salt: 0}();
            }
        }

        contract other {
            function test() public {

            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.function_expect_failure("test", Vec::new());

    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                other o = new other();

                other t = new other();
            }
        }

        contract other {
            function test() public {

            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());
}

#[test]
fn try_catch_external_calls() {
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                other o = new other();
                int32 x = 0;
                try o.test() returns (int32 y, bool) {
                    x = y;
                } catch (bytes) {
                    x = 2;
                }
                assert(x == 102);
            }
        }

        contract other {
            function test() public returns (int32, bool) {
                return (102, true);
            }
        }
        "##,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract c {
            function test() public {
                other o = new other();
                int32 x = 0;
                try o.test() returns (int32 y, bool) {
                    x = y;
                } catch (bytes c) {
                    assert(c == hex"08c379a00c666f6f");
                    x = 2;
                }
                assert(x == 2);
            }
        }

        contract other {
            function test() public returns (int32, bool) {
                revert("foo");
            }
        }
        "#,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract c {
            function test() public {
                other o = new other();

                try o.test(1) {
                    print("shouldn't be here");
                    assert(false);
                } catch Error(string foo) {
                    print(foo);
                    assert(foo == "yes");
                } catch (bytes c) {
                    print("shouldn't be here");
                    assert(false);
                }

                try o.test(2) {
                    print("shouldn't be here");
                    assert(false);
                } catch Error(string foo) {
                    print(foo);
                    assert(foo == "no");
                } catch (bytes c) {
                    print("shouldn't be here");
                    assert(false);
                }

                try o.test(3) {
                    print("shouldn't be here");
                    assert(false);
                } catch Error(string foo) {
                    print("shouldn't be here");
                    assert(false);
                } catch (bytes c) {
                    assert(c.length == 0);
                }
            }
        }

        contract other {
            function test(int x) public {
                if (x == 1) {
                    revert("yes");
                } else if (x == 2) {
                    revert("no");
                } else {
                    revert();
                }
            }
        }
        "#,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    #[derive(Debug, PartialEq, Eq, Encode, Decode)]
    struct Ret(u32);

    let mut runtime = build_solidity(
        r#"
        contract dominator {
            child c;

            function create_child() public {
                c = (new child)();
            }

            function call_child() public view returns (int64) {
                return c.get_a();
            }

            function test() public pure returns (int32) {
                try c.go_bang() returns (int32 l) {
                    print("try call success");
                    return 8000;
                }
                catch Error(string l) {
                    print("try error path");
                    print(l);
                    return 4000;
                }
                catch {
                    print("try catch path");
                    return 2000;
                }

            }
        }

        contract child {
            int64 a;
            constructor() public {
                a = 102;
            }

            function get_a() public view returns (int64) {
                return a;
            }

            function set_a(int64 l) public {
                a = l;
            }

            function go_bang() public pure returns (int32) {
                revert("gone bang in child");
            }
        }"#,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("create_child", Vec::new());

    runtime.function("test", Vec::new());
    assert_eq!(runtime.output(), 4000i32.encode());
}

#[test]
fn try_catch_external_calls_dont_decode_returns() {
    // try not using the return values of test() - revert case
    // note the absense of "try o.test() returns (int32 y, bool) {"
    let mut runtime = build_solidity(
        r#"
        contract c {
            function test() public returns (int32 x) {
                other o = new other();
                try o.test() {
                    x = 1;
                } catch (bytes c) {
                    x = 2;
                }
            }
        }

        contract other {
            function test() public returns (int32, bool) {
                revert("foo");
            }
        }
        "#,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    assert_eq!(runtime.output(), 2i32.encode());

    // try not using the return values of test() - normal case
    // note the absense of "try o.test() returns (int32 y, bool) {"
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public returns (int32 x) {
                other o = new other();
                try o.test({meh: false}) {
                    x = 1;
                } catch (bytes c) {
                    x = 2;
                }
            }
        }

        contract other {
            function test(bool meh) public returns (int32, bool) {
                return (5, meh);
            }
        }
        "##,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    assert_eq!(runtime.output(), 1i32.encode());
}

#[test]
fn try_catch_constructor() {
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                int x;
                try (new other)() {
                    x = 102;
                } catch (bytes) {
                    x = 2;
                }
                assert(x == 102);
            }
        }

        contract other {
            function test() public returns (int32, bool) {
                return (102, true);
            }
        }
        "##,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
                int x;
                try new other({foo: true}) returns (other o) {
                    (x, bool yata) = o.test();
                } catch (bytes) {
                    x = 2;
                }
                assert(x == 102);
            }
        }

        contract other {
            constructor(bool foo) public {
                //
            }

            function test() public returns (int32, bool) {
                return (102, true);
            }
        }
        "##,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract c {
            function test() public {
                int32 x = 0;
                try new other(true) {
                    x = 1;
                } catch (bytes c) {
                    print("returns:{}".format(c));
                    assert(c == hex"08c379a00c666f6f");
                    x = 2;
                }
                assert(x == 2);
            }
        }

        contract other {
            constructor(bool foo) public {
                revert("foo");
            }

            function _ext() public {}
        }
        "#,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());
}

#[test]
fn local_destructure_call() {
    let mut runtime = build_solidity(
        r#"
        contract c {
            function test() public {
                (, bytes32 b, string s) = foo();

                assert(b == "0123");
                assert(s == "abcd");
            }

            function foo() public returns (bool, bytes32, string) {
                return (true, "0123", "abcd");
            }
        }
        "#,
    );

    runtime.function("test", Vec::new());
}

#[test]
fn payable_constructors() {
    // no contructors means constructor is not payable
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test(string a) public {}
        }"##,
    );

    runtime.set_transferred_value(1);
    runtime.raw_constructor_failure(runtime.contracts()[0].code.constructors[0].clone());
    assert!(runtime
        .debug_buffer()
        .contains("runtime_error: non payable constructor"));

    // contructors w/o payable means can't send value
    let mut runtime = build_solidity(
        r##"
        contract c {
            constructor() public {
                int32 a = 0;
            }

            function test(string a) public {}
        }"##,
    );

    runtime.set_transferred_value(1);
    runtime.raw_constructor_failure(runtime.contracts()[0].code.constructors[0].clone());
    assert!(runtime
        .debug_buffer()
        .contains("runtime_error: non payable constructor"));

    // contructors w/ payable means can send value
    let mut runtime = build_solidity(
        r##"
        contract c {
            constructor() public payable {
                int32 a = 0;
            }

            function test(string a) public {}
        }"##,
    );

    runtime.set_transferred_value(1);
    runtime.constructor(0, Vec::new());
}

#[test]
fn payable_functions() {
    // function w/o payable means can't send value
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() public {
            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.set_transferred_value(1);
    runtime.function_expect_failure("test", Vec::new());

    // test both
    let mut runtime = build_solidity(
        r##"
        contract c {
            function test() payable public {
            }
            function test2() public {
            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.set_transferred_value(1);
    runtime.function_expect_failure("test2", Vec::new());
    runtime.set_transferred_value(1);
    runtime.function("test", Vec::new());

    // test fallback and receive
    #[derive(Debug, PartialEq, Eq, Encode, Decode)]
    struct Ret(u32);

    let mut runtime = build_solidity(
        r##"
        contract c {
            int32 x;

            function get_x() public returns (int32) {
                return x;
            }

            function test() payable public {
                x = 1;
            }

            fallback() external {
                x = 2;
            }

            receive() payable external {
                x = 3;
            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.set_transferred_value(1);
    runtime.raw_function(b"abde".to_vec());
    runtime.function("get_x", Vec::new());

    assert_eq!(runtime.output(), Ret(3).encode());

    runtime.raw_function(b"abde".to_vec());
    runtime.function("get_x", Vec::new());

    assert_eq!(runtime.output(), Ret(2).encode());

    let mut runtime = build_solidity(
        r##"
        contract c {
            int32 x;

            function get_x() public returns (int32) {
                return x;
            }

            function test() payable public {
                x = 1;
            }

            receive() payable external {
                x = 3;
            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.set_transferred_value(1);
    runtime.raw_function(b"abde".to_vec());
    runtime.function("get_x", Vec::new());

    assert_eq!(runtime.output(), Ret(3).encode());

    runtime.raw_function_failure(b"abde".to_vec());
    let mut runtime = build_solidity(
        r##"
        contract c {
            int32 x;

            function get_x() public returns (int32) {
                return x;
            }

            function test() payable public {
                x = 1;
            }

            fallback() external {
                x = 2;
            }
        }"##,
    );

    runtime.constructor(0, Vec::new());
    runtime.set_transferred_value(1);
    runtime.raw_function_failure(b"abde".to_vec());

    runtime.set_transferred_value(0);
    runtime.raw_function(b"abde".to_vec());
    runtime.function("get_x", Vec::new());

    assert_eq!(runtime.output(), Ret(2).encode());
}

#[test]
fn hash_tests() {
    let mut runtime = build_solidity(
        r#"
        contract tester {
            function test() public {
                bytes32 hash = keccak256("Hello, World!");

                assert(hash == hex"acaf3289d7b601cbd114fb36c4d29c85bbfd5e133f14cb355c3fd8d99367964f");
            }
        }"#,
    );

    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract tester {
            function test() public {
                bytes memory s = "Hello, World!";
                bytes32 hash = keccak256(s);

                assert(hash == hex"acaf3289d7b601cbd114fb36c4d29c85bbfd5e133f14cb355c3fd8d99367964f");
            }
        }"#,
    );

    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract tester {
            bytes s = "Hello, World!";

            function test() public {
                bytes32 hash = keccak256(s);

                assert(hash == hex"acaf3289d7b601cbd114fb36c4d29c85bbfd5e133f14cb355c3fd8d99367964f");
            }
        }"#,
    );

    runtime.constructor(0, Vec::new());
    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract tester {
            function test() public {
                bytes32 hash = sha256("Hello, World!");

                assert(hash == hex"dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f");
            }
        }"#,
    );

    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract tester {
            function test() public {
                bytes32 hash = blake2_256("Hello, World!");

                assert(hash == hex"511bc81dde11180838c562c82bb35f3223f46061ebde4a955c27b3f489cf1e03");
            }
        }"#,
    );

    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract tester {
            function test() public {
                bytes16 hash = blake2_128("Hello, World!");

                assert(hash == hex"3895c59e4aeb0903396b5be3fbec69fe");
            }
        }"#,
    );

    runtime.function("test", Vec::new());

    let mut runtime = build_solidity(
        r#"
        contract tester {
            function test() public {
                bytes20 hash = ripemd160("Hello, World!");

                assert(hash == hex"527a6a4b9a6da75607546842e0e00105350b1aaf");
            }
        }"#,
    );

    runtime.function("test", Vec::new());
}

#[test]
fn try_catch_reachable() {
    // ensure that implicit return gets added correctly if catch reachable not
    let _ = build_solidity(
        r##"
        contract AddNumbers { function add(uint256 a, uint256 b) external returns (uint256 c) {c = a + b;} }

        contract Example {
            AddNumbers addContract;
            event StringFailure(string stringFailure);
            event BytesFailure(bytes bytesFailure);

            function exampleFunction(uint256 _a, uint256 _b) public returns (uint256 _c) {

                try addContract.add(_a, _b) returns (uint256 _value) {
                    return (_value);
                } catch Error(string memory _err) {
                    // This may occur if there is an overflow with the two numbers and the `AddNumbers` contract explicitly fails with a `revert()`
                    emit StringFailure(_err);
                } catch (bytes memory _err) {
                    emit BytesFailure(_err);
                }
                _c = 1;
            }
        }"##,
    );

    let _ = build_solidity(
        r##"
        contract AddNumbers { function add(uint256 a, uint256 b) external returns (uint256 c) {c = a + b;} }

        contract Example {
            AddNumbers addContract;
            event StringFailure(string stringFailure);
            event BytesFailure(bytes bytesFailure);

            function exampleFunction(uint256 _a, uint256 _b) public returns (uint256 _c) {

                try addContract.add(_a, _b) returns (uint256 _value) {
                    return (_value);
                } catch Error(string memory _err) {
                    // This may occur if there is an overflow with the two numbers and the `AddNumbers` contract explicitly fails with a `revert()`
                    emit StringFailure(_err);
                } catch (bytes memory _err) {
                    emit BytesFailure(_err);
                    return;
                }
                _c = 1;
            }
        }"##,
    );
}

#[test]
fn log_api_call_return_values_works() {
    let mut runtime = build_solidity_with_options(
        r#"
        contract Test {
            constructor () payable {}

            function test() public {
                try new Other() returns (Other o) {
                    o.foo();
                }
                catch {}
            }
        }
        contract Other {
            function foo() public pure {
                print("hi!");
            }
        }
        "#,
        true,
        false,
    );

    runtime.constructor(0, vec![]);
    runtime.function("test", vec![]);
    assert_eq!(
        &runtime.debug_buffer(),
        r##"call: instantiation_nonce=2,
call: seal_instantiate=0,
print: hi!,
call: seal_debug_message=0,
call: seal_call=0,
"##
    );
}

#[test]
fn selector() {
    let mut runtime = build_solidity_with_options(
        r##"
        contract c {
            function g() pure public returns (bytes4) {
                return this.f.selector ^ this.x.selector;
            }
            function f() public pure {}
            function x() public pure {}
        }"##,
        false,
        true,
    );

    runtime.function("g", vec![]);

    runtime.contracts()[0].code.messages["f"]
        .iter()
        .zip(&runtime.contracts()[0].code.messages["x"])
        .map(|(f, x)| f ^ x)
        .zip(runtime.output())
        .for_each(|(actual, expected)| assert_eq!(actual, expected));
}

#[test]
fn call_flags() {
    let src = r##"
contract Flagger {
    uint8 roundtrips = 0;

    // Reentrancy is required for reaching the `foo` function for itself.
    //
    // Cloning and forwarding should have the effect of calling this function again, regardless of what _address was passed.
    // Furthermore:
    // Cloning the clone should work together with reentrancy.
    // Forwarding the input should fail caused by reading the input more than once in the loop
    // Tail call should work with any combination of input forwarding.
    function echo(
        address _address,
        uint32 _x,
        uint32 _flags
    ) public payable returns(uint32 ret) {
        for (uint n = 0; n < 2; n++) {
            if (roundtrips > 1) {
                return _x;
            }
            roundtrips += 1;

            bytes input = abi.encode(bytes4(0), _x);
            (bool ok, bytes raw) =  _address.call{flags: _flags}(input);
            require(ok);
            ret = abi.decode(raw, (uint32));

            roundtrips -= 1;
        }
    }

    @selector([0,0,0,0])
    function foo(uint32 x) public pure returns(uint32) {
        return x;
    }

    // Yields different result for tail calls
    function tail_call_it(
        address _address,
        uint32 _x,
        uint32 _flags
    ) public returns(uint32 ret) {
        bytes input = abi.encode(bytes4(0), _x);
        (bool ok, bytes raw) =  _address.call{flags: _flags}(input);
        require(ok);
        ret = abi.decode(raw, (uint32));
        ret += 1;
    }
}"##;

    let forward_input = 0b1u32;
    let clone_input = 0b10u32;
    let tail_call = 0b100u32;
    let allow_reentry = 0b1000u32;

    let mut runtime = build_solidity(src);
    let address = runtime.caller();
    let voyager = 123456789;

    let with_flags = |flags| (address, voyager, flags).encode();

    // Should work with the reentrancy flag
    runtime.function("echo", with_flags(allow_reentry));
    assert_eq!(u32::decode(&mut &runtime.output()[..]).unwrap(), voyager);

    // Should work with the reentrancy and the tail call flag
    runtime.function("echo", with_flags(allow_reentry | tail_call));
    assert_eq!(u32::decode(&mut &runtime.output()[..]).unwrap(), voyager);
    runtime.constructor(0, vec![]); // Call the storage initializer after tail_call

    // Should work with the reentrancy and the clone input
    runtime.function("echo", with_flags(allow_reentry | clone_input));
    assert_eq!(u32::decode(&mut &runtime.output()[..]).unwrap(), voyager);

    // Should work with the reentrancy clone input and tail call flag
    runtime.function("echo", with_flags(allow_reentry | clone_input | tail_call));
    assert_eq!(u32::decode(&mut &runtime.output()[..]).unwrap(), voyager);
    runtime.constructor(0, vec![]); // Reset counter in storage after tail call

    // Should fail without the reentrancy flag
    runtime.function_expect_failure("echo", with_flags(0));
    runtime.constructor(0, vec![]); // Reset counter in storage after fail

    runtime.function_expect_failure("echo", with_flags(tail_call));
    runtime.constructor(0, vec![]); // Reset counter in storage after fail

    // Should fail with input forwarding
    runtime.function_expect_failure("echo", with_flags(allow_reentry | forward_input));
    runtime.constructor(0, vec![]); // Reset counter in storage after fail

    // Test the tail call without setting it
    runtime.function("tail_call_it", with_flags(allow_reentry));
    assert_eq!(
        u32::decode(&mut &runtime.output()[..]).unwrap(),
        voyager + 1
    );

    // Test the tail call with setting it
    runtime.function("tail_call_it", with_flags(allow_reentry | tail_call));
    assert_eq!(u32::decode(&mut &runtime.output()[..]).unwrap(), voyager);
    runtime.constructor(0, vec![]); // Call the storage initializer after tail_call
}

#[test]
fn constructors_and_messages_distinct_in_dispatcher() {
    let mut runtime = build_solidity(
        r##"
        contract c {
            @selector([0, 1, 2, 3])
            constructor() {}

            @selector([4, 5, 6, 7])
            function foo() public pure {}
        }"##,
    );

    let constructor = vec![0, 1, 2, 3];
    // Given this constructor selector works as intended
    runtime.raw_constructor(constructor.clone());
    // Expect calling the constructor via "call" to trap the contract
    runtime.raw_function_failure(constructor);

    let function = vec![4, 5, 6, 7];
    // Given this function selector works as intended
    runtime.raw_function(function.clone());
    // Expect calling the function via "deploy" to trap the contract
    runtime.raw_constructor_failure(function);
}

#[test]
fn error_bubbling() {
    let mut runtime = build_solidity(
        r##"contract C {
        function raw_call() public payable returns (bytes ret) {
            B b = new B();
            (bool ok, ret) = address(b).call{value: 5000}(bytes4(0x00000000));
        }
    
        function normal_call() public payable {
            B b = new B();
            b.b();
        }
    
        function ext_func_call() public payable {
            A a = new A();
            function() external payable func = a.a;
            func{value: 1000}();
            a.a();
        }
    
    }
    
    contract B {
        @selector([0, 0, 0, 0])
        function b() public payable {
            A a = new A();
            a.a();
        }
    }
    
    contract A {
        function a() public payable {
            revert("no");
        }
    }
    "##,
    );

    runtime.set_transferred_value(20000);
    let expected_output = ([0x08u8, 0xc3, 0x79, 0xa0], "no".to_string()).encode();

    // The raw call must not bubble up
    runtime.function("raw_call", vec![]);
    assert_eq!(runtime.output(), expected_output.encode());

    runtime.function_expect_failure("normal_call", vec![]);
    assert_eq!(runtime.output(), expected_output);
    assert!(runtime.debug_buffer().contains("external call failed"));

    runtime.function_expect_failure("ext_func_call", vec![]);
    assert_eq!(runtime.output(), expected_output);
    assert!(runtime.debug_buffer().contains("external call failed"));
}

#[test]
fn constructor_reverts_bubbling() {
    let mut runtime = build_solidity(
        r##"
        contract A {
            B public b;
            constructor(bool r) payable {
                b = new B(r);
            }
        }
    
        contract B {
            C public c;
            constructor(bool r) payable {
                c = new C(r);
            }
        }
    
        contract C {
            uint public foo;
            constructor(bool r) {
                if (!r) revert("no");
            }
        }"##,
    );

    runtime.set_transferred_value(20000);
    runtime.constructor(0, true.encode());

    let mut input = runtime.contracts()[0].code.constructors[0].clone();
    input.push(0);
    runtime.raw_constructor_failure(input);

    let expected_output = ([0x08u8, 0xc3, 0x79, 0xa0], "no".to_string()).encode();
    assert_eq!(runtime.output(), expected_output);
}

#[test]
fn try_catch_uncaught_bubbles_up() {
    let mut runtime = build_solidity(
        r##"contract C {
        function c() public payable {
            B b = new B();
            b.b{value: 1000}();
        }
    }
    
    contract B {
        function b() public payable {
            A a = new A();
            try a.a(0) {} catch Error(string) {}
        }
    }
    
    contract A {
        function a(uint div) public pure returns(uint) {
            return 123 / div;
        }
    }
    "##,
    );

    runtime.set_transferred_value(10000);
    runtime.function_expect_failure("c", vec![]);

    let panic = PanicCode::DivisionByZero;
    let expected_output = (
        SolidityError::Panic(panic).selector().to_be_bytes(),
        U256::from(panic as u8),
    )
        .encode();

    assert_eq!(runtime.output(), expected_output);
    assert!(runtime.debug_buffer().contains("external call failed"));
}

#[test]
fn try_catch_transfer_fail() {
    let mut runtime = build_solidity_with_options(
        r#"contract runner {
        function test(uint128 amount) public returns (bytes) {
            try new aborting{value: amount}(true) returns (
                aborting a
            ) {} catch Error(string x) {
                return hex"41";
            } catch (bytes raw) {
                return raw;
            }

            return hex"ff";
        }
    }

    contract aborting {
        constructor(bool abort) {
            if (abort) {
                revert("bar");
            }
        }

        function foo() public pure {}
    }"#,
        true,
        true,
    );

    // Expect the contract to catch the reverting child constructor
    runtime.function("test", 0u128.encode());
    assert_eq!(runtime.output(), vec![0x41u8].encode());
    assert!(runtime.debug_buffer().contains("seal_instantiate=2"));

    // Trying to instantiate with value while having insufficient funds result in
    // seal_instantiate failing with transfer failed (return code 5).
    // Now, the "catch (bytes raw)" clause should catch that, because there is no
    // return data to be decoded.
    runtime.function("test", 1u128.encode());
    assert_eq!(runtime.output(), Vec::<u8>::new().encode());
    assert!(runtime.debug_buffer().contains("seal_instantiate=5"));
}