refactor: use libsecp256k1 or wasm

Author: hugocaillard

Cargo.lock

@@ -46,10 +46,6 @@ winapi = { version = "0.3", features = ["fileapi", "processenv", "winnt"] }
 version = "1.0"
 features = ["arbitrary_precision", "unbounded_depth"]
 
-[dependencies.secp256k1]
-version = "0.24.3"
-features = ["serde", "recovery"]
-
 [dependencies.ed25519-dalek]
 workspace = true
 
@@ -61,6 +57,12 @@ features = ["serde"]
 version = "0.2.23"
 features = ["std"]
 
+[target.'cfg(not(target_family = "wasm"))'.dependencies]
+secp256k1 = { version = "0.24.3", features = ["serde", "recovery"] }
+
+[target.'cfg(target_family = "wasm")'.dependencies]
+libsecp256k1 = { version = "0.7.0" }
+
 [dev-dependencies]
 rand_core = { workspace = true }