docs: update README and build documentation for Windows support limitations

fix: adjust bridge FFI implementation for Windows compatibility
fix: modify Cargo.toml to conditionally include bridge dependency
fix: enhance error handling in bridge FFI for unsupported Windows operations
refactor: update crypto module to use correct Wots imports
refactor: improve BridgeClient to handle null checks and hex encoding
test: skip integration tests on Windows due to bridge limitations
test: enhance unit tests to handle native availability checks

Author: ponzienjoyer

README.md

@@ -84,13 +84,24 @@ PonziTech.BitVM.Bridge    - Bridge operations (peg-in/peg-out graphs)
 
 ## Supported Platforms
 
+**Core (script execution + crypto):**
 | Platform | Architecture | Status |
 |----------|--------------|--------|
 | Windows | x64 | ✅ Supported |
 | Linux | x64 | ✅ Supported |
 | macOS | x64 | ✅ Supported |
 | macOS | ARM64 | ✅ Supported |
 
+**Bridge (peg-in/peg-out operations):**
+| Platform | Architecture | Status |
+|----------|--------------|--------|
+| Windows | x64 | ❌ Not supported (see note below) |
+| Linux | x64 | ✅ Supported |
+| macOS | x64 | ✅ Supported |
+| macOS | ARM64 | ✅ Supported |
+
+**Note:** The bridge Rust crate depends on unix-only SSH/SFTP components upstream. On Windows, the bridge FFI exports are present but return an error stating that bridge support is unavailable. Use WSL/Linux for bridge workflows.
+
 ## Building from Source
 
 ### Prerequisites

STATUS.md

@@ -35,6 +35,7 @@ The repository now provides working BitVM core bindings (script execution, hashi
 - Peg-out graphs and flows are not yet exposed in the C# API.
 - Peg-in status calls require Esplora connectivity (provide `BridgeConfiguration.EsploraUrl` or rely on defaults).
 - Peg-in graphs are stored as raw JSON for round-tripping; only top-level metadata is parsed into managed fields.
+- Bridge functionality is not supported on Windows due to upstream unix-only SSH/SFTP dependencies.
 
 ---
 

docs/WINDOWS_BUILD.md

@@ -2,6 +2,12 @@
 
 This document details all dependencies required to build PonziTech.BitVM on Windows.
 
+## Windows Support Scope
+
+- **Core library** (script execution + cryptographic primitives): ✅ supported on Windows.
+- **Bridge library** (peg-in/peg-out operations): ❌ not supported on Windows due to upstream unix-only SSH/SFTP dependencies.
+- **Workaround**: Use WSL/Linux to build and run bridge workflows.
+
 ## Required Dependencies
 
 ### 1. .NET 10.0 SDK

ffi/Cargo.toml

@@ -9,7 +9,6 @@ crate-type = ["cdylib", "staticlib"]
 [dependencies]
 # Core BitVM library (platform-agnostic)
 bitvm = { path = "../external/BitVM/bitvm" }
-bridge = { path = "../external/BitVM/bridge" }
 
 # Bitcoin primitives
 bitcoin = { version = "0.32.5", features = ["std"] }
@@ -20,7 +19,6 @@ hex = "0.4"
 rand = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-tokio = { version = "1.37.0", features = ["rt-multi-thread"] }
 
 # FFI bindings generator
 safer-ffi = { version = "0.1", features = ["proc_macros"] }
@@ -32,4 +30,7 @@ csbindgen = "1.0"
 [target.'cfg(windows)'.dependencies]
 
 # Unix-specific dependencies (not used on Windows)
-[target.'cfg(unix)'.dependencies]
+[target.'cfg(not(windows))'.dependencies]
+bridge = { path = "../external/BitVM/bridge" }
+esplora-client = { git = "https://github.com/BitVM/rust-esplora-client" }
+tokio = { version = "1.37.0", features = ["rt-multi-thread"] }