Add transaction creation to WASM backend

zcash-client-backend-wasm/Cargo.toml

@@ -16,6 +16,10 @@ protobuf = "2"
 wasm-bindgen = "0.2"
 web-sys = { version = "0.3", features = ["console"] }
 
+# We don't use these crates directly, but we add it as a dependency so we can
+# enable necessary features for WASM compatibility.
+rand = { version = "0.6", features = ["wasm-bindgen"] }
+
 # The `console_error_panic_hook` crate provides better debugging of panics by
 # logging them with `console.error`. This is great for development, but requires
 # all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
@@ -29,6 +33,12 @@ console_error_panic_hook = { version = "0.1.1", optional = true }
 # Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
 wee_alloc = { version = "0.4.2", optional = true }
 
+[dependencies.bellman]
+git = "https://github.com/str4d/librustzcash.git"
+branch = "demo-wasm"
+default-features = false
+features = ["groth16"]
+
 [dependencies.pairing]
 git = "https://github.com/str4d/librustzcash.git"
 branch = "demo-wasm"
@@ -36,14 +46,22 @@ branch = "demo-wasm"
 [dependencies.sapling-crypto]
 git = "https://github.com/str4d/librustzcash.git"
 branch = "demo-wasm"
+default-features = false
 
 [dependencies.zcash_client_backend]
 git = "https://github.com/str4d/librustzcash.git"
 branch = "demo-wasm"
+default-features = false
 
 [dependencies.zcash_primitives]
 git = "https://github.com/str4d/librustzcash.git"
 branch = "demo-wasm"
+default-features = false
+
+[dependencies.zcash_proofs]
+git = "https://github.com/str4d/librustzcash.git"
+branch = "demo-wasm"
+default-features = false
 
 [dev-dependencies]
 wasm-bindgen-test = "0.2"