wasm configuration issue

[fgtest1]

HI,
trying configure wasm and running with multi conflicts with getrandom and rand_core
libp2p v0.56

issue with these config lines

getrandom = { version = "0.2", features = ["js"] }
rand = { version = "0.8", features = ["getrandom"] }
ed25519-dalek = { version = "2.0", features = ["getrandom"] }

ed25519-dalek = { version = "2.0", features = ["getrandom"] }

---

global config \Cargo.toml

[workspace.dependencies]

serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
libp2p = { path = "../rust-libp2p/libp2p", features = [
"tcp", "noise", "yamux", "kad", "request-response", "macros", "cbor",
"tokio", # For native builds
"wasm-bindgen", # enables getrandom/js for WASM
"websocket-websys", # WASM-compatible transport
"webtransport-websys" # WASM-compatible transport
] }

tokio = { version = "1.0", features = ["full"] } # this for native builds

wasm-bindgen = "0.2"
js-sys = "0.3"
web-sys = { version = "0.3", features = ["console"] }
uuid = { version = "1.0", features = ["v4"] }

getrandom = { version = "0.2", features = ["js"] }
rand = { version = "0.8", features = ["getrandom"] }
ed25519-dalek = { version = "2.0", features = ["getrandom"] }

libp2p-websocket-websys = { path = "../rust-libp2p/transports/websocket-websys" }

---

packages\core\Cargo.toml

Tried different config but got Error (see below )

[dependencies]

Core dependencies (work in both WASM and native)

...
#getrandom = { workspace = true }
#ed25519-dalek = { workspace = true, features = ["getrandom"] } # getrandom feature
ed25519-dalek = { workspace = true }

*** Errors
wasm-pack build --target web --out-dir pkg
Error: cargo metadata exited with an error: error: failed to select a version for ed25519-dalek.
... required by package xxxx-core v0.1.0 (C:\APPS3\xxxx-monorepo\packages\core)
versions that meet the requirements ^2.0 (locked to 2.2.0) are: 2.2.0

package xxxx-core depends on ed25519-dalek with feature getrandom but ed25519-dalek does not have that feature.

failed to select a version for ed25519-dalek which could resolve this conflict

Caused by: cargo metadata exited with an error: error: failed to select a version for ed25519-dalek.
... required by package xxxx-core v0.1.0 (C:\APPS3\xxxx-monorepo\packages\core)
versions that meet the requirements ^2.0 (locked to 2.2.0) are: 2.2.0

package xxxx-core depends on ed25519-dalek with feature getrandom but ed25519-dalek does not have that feature.

failed to select a version for ed25519-dalek which could resolve this conflict

[oblique]

Hi,

ed25519-dalek doesn't have the feature getrandom but it has rand_core. Change it to this:

ed25519-dalek = { version = "2.0", features = ["rand_core"] }

And then enable getrandom in your packages\core\Cargo.toml:

getrandom = { workspace = true }

[fgtest1]

after update
root
getrandom = { version = "0.2", features = ["js"] } # enables WASM support
ed25519-dalek = { version = "2.0", features = ["rand_core"] } # Use rand_core

\packages\core
getrandom = { workspace = true }
ed25519-dalek = { workspace = true }

now is "wasm_js" and fill_inner(dest) inner_u32() inner_u64()

Compiling aead v0.5.2
error: The wasm32-unknown-unknown targets are not supported by default; you may need to enable the "wasm_js" configuration flag. Note that enabling the wasm_js feature flag alone is insufficient. For more information see: https://docs.rs/getrandom/0.3.4/#webassembly-support
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\getrandom-0.3.4\src\backends.rs:194:17
|
194 | / compile_error!(concat!(
195 | | "The wasm32-unknown-unknown targets are not supported by default;
196 | | you may need to enable the "wasm_js" configuration flag. Note
197 | | that enabling the wasm_js feature flag alone is insufficient.
198 | | For more information see:
199 | | https://docs.rs/getrandom/", env!("CARGO_PKG_VERSION"), "/#webassembly-support"
200 | | ));
| |__________________^

error[E0425]: cannot find function fill_inner in module backends
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\getrandom-0.3.4\src\lib.rs:99:19
|
99 | backends::fill_inner(dest)?;
| ^^^^^^^^^^ not found in backends

error[E0425]: cannot find function inner_u32 in module backends
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\getrandom-0.3.4\src\lib.rs:123:15
|
123 | backends::inner_u32()
| ^^^^^^^^^ not found in backends
|
help: consider importing this function
|
33 + use crate::util::inner_u32;
|
help: if you import inner_u32, refer to it directly
|
123 - backends::inner_u32()
123 + inner_u32()
|

error[E0425]: cannot find function inner_u64 in module backends
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\getrandom-0.3.4\src\lib.rs:137:15
|
137 | backends::inner_u64()
| ^^^^^^^^^ not found in backends
|
help: consider importing this function
|
33 + use crate::util::inner_u64;
|
help: if you import inner_u64, refer to it directly
|
137 - backends::inner_u64()
137 + inner_u64()
|

For more information about this error, try rustc --explain E0425.
error: could not compile getrandom (lib) due to 4 previous errors
warning: build failed, waiting for other jobs to finish...
Error: Compiling your crate to WebAssembly failed
Caused by: Compiling your crate to WebAssembly failed
Caused by: failed to execute cargo build: exited with exit code: 101
full command: "cargo" "build" "--lib" "--release" "--target" "wasm32-unknown-unknown"

[oblique]

Use getrandom v0.3.4 instead of 0.3.3.

In my case I'm doing this in my projects:

[target.'cfg(target_arch = "wasm32")'.dependencies]
getrandom = { package = "getrandom", version = "0.3.4", features = ["wasm_js"] }
getrandom_02 = { package = "getrandom", version = "0.2.16", features = ["js"] }

This enables WASM JS backend for both, 0.2 and 0.3 getrandom

[fgtest1]

Hi thank you oblique for your replied
I am going nuts with the fix config over 6 days!.. digging search..etc and found yesterday the tree.

I configured as per your suggestion. However still not compiling. here what I got on each libp2p v0.56

**root cargo
getrandom = { version = "0.3.4"}
getrandom_02 = { version = "0.2.16"}
ed25519-dalek = { version = "2.1.1", features = ["rand_core"] } # include 'getrandom' feature

**package\core\Cargo
getrandom = { workspace = true }
ed25519-dalek = { workspace = true }
...

WASM-specific (for browser compatibility)

[target.'cfg(target_arch = "wasm32")'.dependencies]
web-sys = { workspace = true, features = [
"console",
"Crypto",
"SubtleCrypto",
"Window",
"WorkerGlobalScope"
] }

getrandom = { package = "getrandom", version = "0.3.4", features = ["wasm_js"] }
getrandom_02 = { package = "getrandom", version = "0.2.16", features = ["js"] }

[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
tokio = { workspace = true, features = ["full"] }
tracing = { workspace = true }
tracing-subscriber = { workspace = true }

**the config for the flag
[target.wasm32-unknown-unknown]
rustflags = [ '--cfg', 'getrandom_backend="wasm_js"' ]

would you be so kind to detail what is the right configuration please.
question the lib has getrandom v0.2.15 but you refer v0.2.16 where does it come from not on the lib tree?

LOG -tone of errors..

C:\APPS3\XXXX-monorepo\packages\core>wasm-pack build --target web --out-dir pkg
[INFO]: Checking for the Wasm target...
[INFO]: Compiling to Wasm...
Compiling mio v1.1.0
Compiling uuid v1.18.1
error: This wasm target is unsupported by mio. If using Tokio, disable the net feature.
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\mio-1.1.0\src\lib.rs:44:1
|
44 | compile_error!("This wasm target is unsupported by mio. If using Tokio, disable the net feature.");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0432]: unresolved import crate::sys::IoSourceState
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\mio-1.1.0\src\io_source.rs:14:5
|
14 | use crate::sys::IoSourceState;
| ^^^^^^^^^^^^^^^^^^^^^^^^^ no IoSourceState in sys
error[E0432]: unresolved import crate::sys::tcp
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\mio-1.1.0\src\net\tcp\listener.rs:20:5
|
20 | tcp::{bind, listen, new_for_addr},
| ^^^ could not find tcp in sys

...
note: found an item that was configured out
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\uuid-1.18.1\src\rng.rs:108:23
|
107 | #[cfg(feature = "rng-rand")]
| -------------------- the item is gated behind the rng-rand feature
108 | pub(super) struct RngImp;
| ^^^^^^
note: found an item that was configured out
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\uuid-1.18.1\src\rng.rs:127:23
|
126 | #[cfg(all(feature = "rng-getrandom", not(feature = "rng-rand")))]
| ------------------------- the item is gated behind the rng-getrandom feature
127 | pub(super) struct RngImp;
.....

37 | pub struct IoSource {
| ---------------------- method deregister not found for this struct
|
= help: items from traits can only be used if the trait is implemented and in scope
note: Source defines an item deregister, perhaps you need to implement it
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\mio-1.1.0\src\event\source.rs:75:1
|
75 | pub trait Source {
| ^^^^^^^^^^^^^^^^

error[E0308]: mismatched types
--> M:\APPS3.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\mio-1.1.0\src\net\udp.rs:762:9
|
762 | / unsafe {
763 | | #[cfg(any(unix, target_os = "hermit", target_os = "wasi"))]
764 | | {
765 | | net::UdpSocket::from_raw_fd(socket.into_raw_fd())
... |
771 | | }
| |_________^ expected UdpSocket, found ()

Some errors have detailed explanations: E0308, E0412, E0425, E0432, E0433, E0599.
For more information about an error, try rustc --explain E0308.
error: could not compile mio (lib) due to 49 previous errors
warning: build failed, waiting for other jobs to finish...
For more information about this error, try rustc --explain E0433.
error: could not compile uuid (lib) due to 4 previous errors
Error: Compiling your crate to WebAssembly failed
Caused by: Compiling your crate to WebAssembly failed
Caused by: failed to execute cargo build: exited with exit code: 101
full command: "cargo" "build" "--lib" "--release" "--target" "wasm32-unknown-unknown"

[dariusc93]

To add to @oblique, and also depending on your exact use case, you may want to also add the following to your .cargo/config.toml when dealing with [email protected]

[target.wasm32-unknown-unknown]
rustflags = ['--cfg', 'getrandom_backend="wasm_js"']

[fgtest1]

dariusc93
yes I have that cover in the config
and this rustflag allow the platform identification

thank you

[fgtest1]

dariusc93
yes I have that cover in the config
and this rustflag allow the platform identification

thank you

[fgtest1]

Finally resolved the tokio conflict and from the info from oblique and have a compiled realese (after over 7 days!! nightmare)

still not sure why getrandom v0.2.16 vs v0.2.15 on libp2p2 tree. maybe this has to do with the (*).

Here is the config that could help anyone else to solve WASM integration

**root cargo
getrandom = { version = "0.3.4"}
getrandom_02 = { version = "0.2.16"}
ed25519-dalek = { version = "2.1.1", features = ["rand_core"] } # include 'getrandom' feature

**package\core\Cargo
getrandom = { workspace = true }
ed25519-dalek = { workspace = true }
...

WASM-specific (for browser compatibility)
[target.'cfg(target_arch = "wasm32")'.dependencies]
web-sys = { workspace = true, features = [
"console",
"Crypto",
"SubtleCrypto",
"Window",
"WorkerGlobalScope"
] }

getrandom = { package = "getrandom", version = "0.3.4", features = ["wasm_js"] }
getrandom_02 = { package = "getrandom", version = "0.2.16", features = ["js"] }

[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
tokio = { workspace = true, features = ["full"] }
tracing = { workspace = true }
tracing-subscriber = { workspace = true }

**the config for the flag
[target.wasm32-unknown-unknown]
rustflags = [ '--cfg', 'getrandom_backend="wasm_js"' ]

LOG
...
Compiling libp2p v0.56.1 (C:\APPS3\rust-libp2p\libp2p)
Compiling xxxx-core v0.1.0 (C:\APPS3\XXXX-monorepo\packages\core)
warning: xxxx-core (lib) generated 4 warnings
Finished release profile [optimized] target(s) in 4m 30s

Big THANKS to oblique I really appreciate your answer to allow me to solve this critical piece.