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Hashmap makes no guarantees about order which includes not guaranteeing true randomness which means we could loop forever. I'm wondering if you could refactor the input to that function in a way that makes it deterministic.
For example instead of &HashMap<(H160, H160), (U256, U256)>
there could be
struct SingleInput {
token0: H160,
token1: H160,
sell0Buy1Amounts: Option<(U256, U256)>,
sell1Buy0Amounts: Option<(U256, U256)>,
}
(can probably make it nicer)
and the function takes an iterator of these. This should work because the function only ever looks at a pair and the reverse together.
Originally posted by @vkgnosis in #28 (comment)
Hi,
I ran cargo build
on my macos and got the following error:
โ cow-dex-solver git:(main) cargo build
Compiling ethcontract-derive v0.15.3
error: linking with `cc` failed: exit status: 1
|
= note: "cc" "-m64" "-arch" "x86_64" "/Users/...
...
= note: ld: reference to symbol (which has not been assigned an address) __ZN4curl4init9INIT_CTOR17h32bbb45c3dd2c85aE in '__ZN4curl4init17h65fffcaa4ea77c83E' from /Users/david/projects/crypto/cow-dex-solver/target/debug/deps/libcurl-4fcdd02a82e2cd5f.rlib(curl-4fcdd02a82e2cd5f.curl.779571c0-cgu.15.rcgu.o) for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: could not compile `ethcontract-derive` due to previous error
Any ideas what's the issue / how to fix?
There appears to be a runtime panic introduced in the slippage computation:
2022-11-04T12:38:43.557Z ERROR cowdexsolver::tracing_helper: thread 'tokio-runtime-worker' panicked at 'denominator == 0', /root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.4.0/src/lib.rs:132:13:
thread 'tokio-runtime-worker' panicked at 'denominator == 0', /root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.4.0/src/lib.rs:132:13
stack backtrace:
0: std::panicking::begin_panic
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:616:12
1: num_rational::Ratio<T>::reduce
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.4.0/src/lib.rs:132:13
2: num_rational::Ratio<T>::new
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.4.0/src/lib.rs:105:9
3: <num_rational::Ratio<T> as core::ops::arith::Div<T>>::div
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.4.0/src/lib.rs:739:9
4: <num_rational::Ratio<T> as core::ops::arith::Div<&T>>::div
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.4.0/src/lib.rs:666:17
5: cowdexsolver::slippage::SlippageCalculator::compute_inner
at ./usr/src/cowdexsolver/src/slippage.rs:108:67
6: cowdexsolver::slippage::SlippageCalculator::compute
at ./usr/src/cowdexsolver/src/slippage.rs:78:36
7: cowdexsolver::slippage::SlippageContext::relative
at ./usr/src/cowdexsolver/src/slippage.rs:41:12
8: cowdexsolver::solve::get_swaps_for_left_over_amounts::{{closure}}::{{closure}}::{{closure}}
at ./usr/src/cowdexsolver/src/solve.rs:394:42
9: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/future/mod.rs:91:19
10: <futures_util::future::maybe_done::MaybeDone<Fut> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-util-0.3.21/src/future/maybe_done.rs:95:38
11: <futures_util::future::join_all::JoinAll<F> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-util-0.3.21/src/future/join_all.rs:143:24
12: cowdexsolver::solve::get_swaps_for_left_over_amounts::{{closure}}
at ./usr/src/cowdexsolver/src/solve.rs:407:48
13: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/future/mod.rs:91:19
14: cowdexsolver::solve::solve::{{closure}}
at ./usr/src/cowdexsolver/src/solve.rs:131:14
15: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/future/mod.rs:91:19
16: cowdexsolver::api::solve::get_solve::{{closure}}::{{closure}}
at ./usr/src/cowdexsolver/src/api/solve.rs:76:66
17: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/future/mod.rs:91:19
18: <F as futures_core::future::TryFuture>::try_poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-core-0.3.21/src/future.rs:82:9
19: <warp::filter::and_then::State<T,F> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/filter/and_then.rs:99:44
20: <warp::filter::and_then::AndThenFuture<T,F> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/filter/and_then.rs:74:9
21: <F as futures_core::future::TryFuture>::try_poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-core-0.3.21/src/future.rs:82:9
22: <warp::filter::recover::RecoverFuture<T,F> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/filter/recover.rs:91:65
23: <F as futures_core::future::TryFuture>::try_poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-core-0.3.21/src/future.rs:82:9
24: <warp::filters::cors::internal::WrappedFuture<F> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/filters/cors.rs:578:26
25: <futures_util::future::either::Either<A,B> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-util-0.3.21/src/future/either.rs:90:33
26: <F as futures_core::future::TryFuture>::try_poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-core-0.3.21/src/future.rs:82:9
27: <warp::filter::service::FilteredFuture<F> as core::future::future::Future>::poll::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/filter/service.rs:128:40
28: scoped_tls::ScopedKey<T>::set
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137:9
29: warp::route::set
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/route.rs:16:5
30: <warp::filter::service::FilteredFuture<F> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/warp-0.3.2/src/filter/service.rs:128:15
31: <hyper::proto::h1::dispatch::Server<S,hyper::body::body::Body> as hyper::proto::h1::dispatch::Dispatch>::poll_msg
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/proto/h1/dispatch.rs:491:35
32: hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T>::poll_write
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/proto/h1/dispatch.rs:297:43
33: hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T>::poll_loop
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/proto/h1/dispatch.rs:161:21
34: hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T>::poll_inner
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/proto/h1/dispatch.rs:137:16
35: hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T>::poll_catch
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/proto/h1/dispatch.rs:120:28
36: <hyper::proto::h1::dispatch::Dispatcher<D,Bs,I,T> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/proto/h1/dispatch.rs:424:9
37: <hyper::server::conn::ProtoServer<T,B,S,E> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/server/conn.rs:952:47
38: <hyper::server::conn::upgrades::UpgradeableConnection<I,S,E> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/server/conn.rs:1012:30
39: <hyper::server::server::new_svc::NewSvcTask<I,N,S,E,W> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.19/src/server/server.rs:728:36
40: tokio::runtime::task::core::CoreStage<T>::poll::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/core.rs:165:17
41: tokio::loom::std::unsafe_cell::UnsafeCell<T>::with_mut
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/loom/std/unsafe_cell.rs:14:9
42: tokio::runtime::task::core::CoreStage<T>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/core.rs:155:13
43: tokio::runtime::task::harness::poll_future::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:470:19
44: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/panic/unwind_safe.rs:271:9
45: std::panicking::try::do_call
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:492:40
46: std::panicking::try
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:456:19
47: std::panic::catch_unwind
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panic.rs:137:14
48: tokio::runtime::task::harness::poll_future
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:458:18
49: tokio::runtime::task::harness::Harness<T,S>::poll_inner
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:104:27
50: tokio::runtime::task::harness::Harness<T,S>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:57:15
51: tokio::runtime::task::raw::RawTask::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/raw.rs:84:18
52: tokio::runtime::task::LocalNotified<S>::run
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/mod.rs:376:9
53: tokio::runtime::thread_pool::worker::Context::run_task::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/thread_pool/worker.rs:458:21
54: tokio::coop::with_budget::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/coop.rs:102:9
55: std::thread::local::LocalKey<T>::try_with
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/thread/local.rs:445:16
56: std::thread::local::LocalKey<T>::with
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/thread/local.rs:421:9
57: tokio::coop::with_budget
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/coop.rs:95:5
58: tokio::coop::budget
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/coop.rs:72:5
59: tokio::runtime::thread_pool::worker::Context::run_task
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/thread_pool/worker.rs:434:9
60: tokio::runtime::thread_pool::worker::Context::run
61: tokio::runtime::thread_pool::worker::run::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/thread_pool/worker.rs:386:17
62: tokio::macros::scoped_tls::ScopedKey<T>::set
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/macros/scoped_tls.rs:61:9
63: tokio::runtime::thread_pool::worker::run
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/thread_pool/worker.rs:383:5
64: tokio::runtime::thread_pool::worker::Launch::launch::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/thread_pool/worker.rs:362:45
65: <tokio::runtime::blocking::task::BlockingTask<T> as core::future::future::Future>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/blocking/task.rs:42:21
66: tokio::runtime::task::core::CoreStage<T>::poll::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/core.rs:165:17
67: tokio::loom::std::unsafe_cell::UnsafeCell<T>::with_mut
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/loom/std/unsafe_cell.rs:14:9
68: tokio::runtime::task::core::CoreStage<T>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/core.rs:155:13
69: tokio::runtime::task::harness::poll_future::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:470:19
70: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/panic/unwind_safe.rs:271:9
71: std::panicking::try::do_call
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:492:40
72: std::panicking::try
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:456:19
73: std::panic::catch_unwind
at ./rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panic.rs:137:14
74: tokio::runtime::task::harness::poll_future
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:458:18
75: tokio::runtime::task::harness::Harness<T,S>::poll_inner
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:104:27
76: tokio::runtime::task::harness::Harness<T,S>::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/harness.rs:57:15
77: tokio::runtime::task::raw::RawTask::poll
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/raw.rs:84:18
78: tokio::runtime::task::UnownedTask<S>::run
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/task/mod.rs:413:9
79: tokio::runtime::blocking::pool::Task::run
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/blocking/pool.rs:91:9
80: tokio::runtime::blocking::pool::Inner::run
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/blocking/pool.rs:325:17
81: tokio::runtime::blocking::pool::Spawner::spawn_thread::{{closure}}
at ./root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.19.2/src/runtime/blocking/pool.rs:300:13
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