Add empty rust crates for protobufs

crates/.gitignore

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+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk

crates/Cargo.toml

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+[workspace]
+members = [
+    "grpcio",
+    "messages",
+    "tonic",
+]
+
+# We need to explicitly specify resolver 2.
+# We shouldn't have to per https://doc.rust-lang.org/edition-guide/rust-2021/default-cargo-resolver.html, but that does not appear to be the case
+resolver = "2"
+
+[profile.release]
+lto = "thin"
+
+[workspace.metadata.release]
+shared-version = true
+dev-version-ext = "beta.0"
+consolidate-commits = true
+consolidate-pushes = true
+tag-name = "v{{version}}"
+
+# The file names in this key are relative to the each crate that gets released.
+# So we only need one `README.md` entry if all the README's follow a
+# common format and are always next to the Cargo.toml for their respective
+# package.
+pre-release-replacements = [
+    {file="README.md", search="mc-probufs-[a-z-]+/[0-9.]+", replace="{{crate_name}}/{{version}}"},
+]

crates/README.md

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+# Rust crates for gRPC interfaces
+
+This is composed of 3 crates:
+
+1. `mc-probufs-tonic`: A crate providing a
+   [Tonic](https://docs.rs/tonic/latest/tonic/) implementation of gRPC client
+   and server services.
+2. `mc-probufs-grpcio`: A crate providing a
+   [grpcio](https://docs.rs/grpcio/latest/grpcio/) implementation of gRPC client
+   and server services.
+3. `mc-probufs-messages`: A crate providing gRPC messages. This is used by
+   both of the service implementations, `mc-probufs-tonic` and `mc-probufs-grpcio`.
+

crates/deny.toml

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+targets = []
+
+[advisories]
+db-path = "~/.cargo/advisory-db"
+db-urls = ["https://github.com/rustsec/advisory-db"]
+vulnerability = "deny"
+unmaintained = "warn"
+yanked = "warn"
+notice = "warn"
+ignore = []
+
+[licenses]
+unlicensed = "deny"
+allow = [
+    "Apache-2.0",
+    "Apache-2.0 WITH LLVM-exception",
+    "BSD-3-Clause",
+    "ISC",
+    "MIT",
+    "Unicode-DFS-2016",
+]
+deny = []
+copyleft = "deny"
+allow-osi-fsf-free = "neither"
+default = "deny"
+confidence-threshold = 0.8
+exceptions = []
+
+[bans]
+multiple-versions = "warn"
+# Lint level for when a crate version requirement is `*`
+wildcards = "deny"
+highlight = "all"
+allow = []
+deny = [
+    # https://github.com/briansmith/ring/issues/774
+    { name = "ring" },
+]
+skip = [
+    # Workaround for path only dependencies,
+    # https://github.com/EmbarkStudios/cargo-deny/issues/241
+    # { name = "some/dev/only/path" },
+]
+skip-tree = [ ]
+
+[sources]
+unknown-registry = "warn"
+unknown-git = "warn"
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+allow-git = []
+
+[sources.allow-org]
+github = []
+gitlab = []
+bitbucket = []

crates/grpcio/Cargo.toml

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+[package]
+name = "mc-probufs-grpcio"
+version = "0.1.0"
+edition = "2021"
+authors = ["MobileCoin"]
+rust-version = "1.65"
+license = "Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/mobilecoinfoundation/probufs"
+description = "grpcio protobufs client and server"
+categories = ["api-bindings" "encoding"]
+keywords = ["grpc" "protobuf" "rpc"]
+
+[dependencies]
+mc-probufs-messages = { path = "../messages", version = "0.1.0" }

crates/grpcio/README.md

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+# MobileCoin: grpcio protobufs services
+
+[![Project Chat][chat-image]][chat-link]<!--
+-->![License][license-image]<!--
+-->![Target][target-image]<!--
+-->[![Crates.io][crate-image]][crate-link]<!--
+-->[![Docs Status][docs-image]][docs-link]<!--
+-->[![Dependency Status][deps-image]][deps-link]
+
+[grpcio](https://docs.rs/grpcio/latest/grpcio/) implementation of protobufs services.
+
+[chat-image]: https://img.shields.io/discord/844353360348971068?style=flat-square
+[chat-link]: https://mobilecoin.chat
+[license-image]: https://img.shields.io/crates/l/mc-probufs-grpcio?style=flat-square
+[target-image]: https://img.shields.io/badge/target-x86__64-blue?style=flat-square
+[crate-image]: https://img.shields.io/crates/v/mc-probufs-grpcio.svg?style=flat-square
+[crate-link]: https://crates.io/crates/mc-probufs-grpcio
+[docs-image]: https://img.shields.io/docsrs/mc-probufs-grpcio?style=flat-square
+[docs-link]: https://docs.rs/crate/mc-probufs-grpcio
+[deps-image]: https://deps.rs/crate/mc-probufs-grpcio/0.1.0/status.svg?style=flat-square
+[deps-link]: https://deps.rs/crate/mc-probufs-grpcio/0.1.0

crates/grpcio/src/lib.rs

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+// Copyright (c) 2023 The MobileCoin Foundation
+
+#![doc = include_str!("../README.md")]
+#![deny(missing_docs, missing_debug_implementations, unsafe_code)]
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}

crates/messages/Cargo.toml

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+[package]
+name = "mc-probufs-messages"
+version = "0.1.0"
+edition = "2021"
+authors = ["MobileCoin"]
+rust-version = "1.65"
+license = "Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/mobilecoinfoundation/probufs"
+description = "Common grpc messages"
+categories = ["encoding"]
+keywords = ["protobuf"]
+
+[dependencies]

crates/messages/README.md

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+# MobileCoin: Common protobuf messages
+
+[![Project Chat][chat-image]][chat-link]<!--
+-->![License][license-image]<!--
+-->![Target][target-image]<!--
+-->[![Crates.io][crate-image]][crate-link]<!--
+-->[![Docs Status][docs-image]][docs-link]<!--
+-->[![Dependency Status][deps-image]][deps-link]
+
+Common protobuf messages. [prost](https://docs.rs/prost/latest/prost/) is used for the message format.
+
+[chat-image]: https://img.shields.io/discord/844353360348971068?style=flat-square
+[chat-link]: https://mobilecoin.chat
+[license-image]: https://img.shields.io/crates/l/mc-probufs-messages?style=flat-square
+[target-image]: https://img.shields.io/badge/target-x86__64-blue?style=flat-square
+[crate-image]: https://img.shields.io/crates/v/mc-probufs-messages.svg?style=flat-square
+[crate-link]: https://crates.io/crates/mc-probufs-messages
+[docs-image]: https://img.shields.io/docsrs/mc-probufs-messages?style=flat-square
+[docs-link]: https://docs.rs/crate/mc-probufs-messages
+[deps-image]: https://deps.rs/crate/mc-probufs-messages/0.1.0/status.svg?style=flat-square
+[deps-link]: https://deps.rs/crate/mc-probufs-messages/0.1.0

crates/messages/src/lib.rs

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+// Copyright (c) 2023 The MobileCoin Foundation
+
+#![doc = include_str!("../README.md")]
+#![deny(missing_docs, missing_debug_implementations, unsafe_code)]
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}

crates/rust-toolchain.toml

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+[toolchain]
+channel = "stable"
+components = [ "clippy", "rustfmt" ]

crates/rustfmt.toml

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+edition = "2021"

crates/tonic/Cargo.toml

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+[package]
+name = "mc-probufs-tonic"
+version = "0.1.0"
+edition = "2021"
+authors = ["MobileCoin"]
+rust-version = "1.65"
+license = "Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/mobilecoinfoundation/probufs"
+description = "Tonic protobufs client and server"
+categories = ["api-bindings" "encoding"]
+keywords = ["grpc" "protobuf" "rpc"]
+
+[dependencies]
+mc-probufs-messages = { path = "../messages", version = "0.1.0" }

crates/tonic/README.md

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+# MobileCoin: Tonic protobufs services
+
+[![Project Chat][chat-image]][chat-link]<!--
+-->![License][license-image]<!--
+-->![Target][target-image]<!--
+-->[![Crates.io][crate-image]][crate-link]<!--
+-->[![Docs Status][docs-image]][docs-link]<!--
+-->[![Dependency Status][deps-image]][deps-link]
+
+[Tonic](https://docs.rs/tonic/latest/tonic/) implementation of gRPC client
+
+[chat-image]: https://img.shields.io/discord/844353360348971068?style=flat-square
+[chat-link]: https://mobilecoin.chat
+[license-image]: https://img.shields.io/crates/l/mc-probufs-tonic?style=flat-square
+[target-image]: https://img.shields.io/badge/target-x86__64-blue?style=flat-square
+[crate-image]: https://img.shields.io/crates/v/mc-probufs-tonic.svg?style=flat-square
+[crate-link]: https://crates.io/crates/mc-probufs-tonic
+[docs-image]: https://img.shields.io/docsrs/mc-probufs-tonic?style=flat-square
+[docs-link]: https://docs.rs/crate/mc-probufs-tonic
+[deps-image]: https://deps.rs/crate/mc-probufs-tonic/0.1.0/status.svg?style=flat-square
+[deps-link]: https://deps.rs/crate/mc-probufs-tonic/0.1.0

crates/tonic/src/lib.rs

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+// Copyright (c) 2023 The MobileCoin Foundation
+
+#![doc = include_str!("../README.md")]
+#![deny(missing_docs, missing_debug_implementations, unsafe_code)]
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}