Add missing FFI modules

New FFI modules required for `libzcash_script`.

Cargo.toml

@@ -50,8 +50,16 @@ path = "src/lib.rs"
 external-secp = []
 
 [dependencies]
-libc="0.2"
 blake2b_simd = "0.5.10"
+halo2 = "0.1.0-beta.1"
+incrementalmerkletree = "0.1"
+libc = "0.2"
+memuse = "0.2"
+orchard = "0.0"
+rand_core = "0.6"
+tracing = "0.1"
+zcash_note_encryption = "0.0"
+zcash_primitives = "0.5"
 
 [build-dependencies]
 cc = { version = ">= 1.0.36", features = ["parallel"] }
@@ -96,3 +104,9 @@ file="CHANGELOG.md"
 search="<!-- next-url -->"
 replace="<!-- next-url -->\n[Unreleased]: https://github.com/ZcashFoundation/{{crate_name}}/compare/{{tag_name}}...HEAD"
 exactly=1
+
+[patch.crates-io]
+incrementalmerkletree = { git = "https://github.com/zcash/incrementalmerkletree", rev = "b7bd6246122a6e9ace8edb51553fbf5228906cbb" }
+orchard = { git = "https://github.com/zcash/orchard.git", rev = "2c8241f25b943aa05203eacf9905db117c69bd29" }
+zcash_note_encryption = { git = "https://github.com/zcash/librustzcash.git", rev = "53d0a51d33a421cb76d3e3124d1e4c1c9036068e" }
+zcash_primitives = { git = "https://github.com/zcash/librustzcash.git", rev = "53d0a51d33a421cb76d3e3124d1e4c1c9036068e" }

src/lib.rs

@@ -6,7 +6,12 @@
 
 include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
+static mut ORCHARD_VK: Option<orchard::circuit::VerifyingKey> = None;
+
 mod blake2b;
+mod orchard_ffi;
+mod streams_ffi;
+mod transaction_ffi;
 
 #[cfg(test)]
 mod tests {

src/orchard_ffi

@@ -0,0 +1 @@
+../depend/zcash/src/rust/src/orchard_ffi

src/orchard_ffi.rs

@@ -0,0 +1 @@
+../depend/zcash/src/rust/src/orchard_ffi.rs

src/streams_ffi.rs

@@ -0,0 +1 @@
+include!("../depend/zcash/src/rust/src/streams_ffi.rs");

src/transaction_ffi.rs

@@ -0,0 +1 @@
+include!("../depend/zcash/src/rust/src/transaction_ffi.rs");