Refactor out transcode as a separate library (use-ink#597)

* refactoring transcode as library

* refactored as lib

* remove unused deps

* fix imports

* cleanup

* modified README

* run fmt

* make clippy happy

* clippy cd

* use std

* PR comments

* fixit

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = [".", "metadata"]
+members = [".", "metadata", "transcode"]
 
 [package]
 name = "cargo-contract"
@@ -39,6 +39,7 @@ toml = "0.5.9"
 rustc_version = "0.4.0"
 blake2 = "0.10.4"
 contract-metadata = { version = "0.6.0", path = "./metadata" }
+transcode = { package = "contract-transcode", version = "0.1.0", path = "./transcode" }
 semver = { version = "1.0.9", features = ["serde"] }
 serde = { version = "1.0.137", default-features = false, features = ["derive"] }
 serde_json = "1.0.81"
@@ -50,19 +51,11 @@ regex = "1.5.6"
 # dependencies for extrinsics (deploying and calling a contract)
 async-std = { version = "1.11.0", features = ["attributes", "tokio1"] }
 ink_metadata = { version = "3", features = ["derive"] }
-ink_env = "3"
-scale-info = { version = "2.1.2", default-features = false, features = ["derive"] }
 sp-core = "6.0.0"
-sp-runtime = "6.0.0"
 pallet-contracts-primitives = "6.0.0"
 subxt = "0.21.0"
 hex = "0.4.3"
 jsonrpsee = { version = "0.13.1", features = ["ws-client"] }
-nom = "7.1.1"
-nom-supreme = { version = "0.7.0", features = ["error"] }
-indexmap = "1.8.2"
-escape8259 = "0.5.1"
-itertools = "0.10.3"
 
 [build-dependencies]
 anyhow = "1.0.57"
@@ -75,16 +68,11 @@ regex = "1.5.6"
 
 [dev-dependencies]
 assert_cmd = "2.0.4"
-assert_matches = "1.5.0"
 pretty_assertions = "1.2.1"
 wabt = "0.10.0"
 regex = "1.5.6"
 predicates = "2.1.1"
 
-ink_primitives = "3"
-ink_storage = "3"
-ink_lang = "3"
-
 [features]
 # This `std` feature is required for testing using an inline contract's metadata, because `ink!` annotates the metadata
 # generation code with `#[cfg(feature = "std")]`.

src/cmd/extrinsics/events.rs

@@ -16,10 +16,6 @@
 
 use super::{
     runtime_api::api::contracts::events::ContractEmitted,
-    transcode::{
-        ContractMessageTranscoder,
-        TranscoderBuilder,
-    },
     RuntimeEvent,
 };
 use crate::{
@@ -28,6 +24,10 @@ use crate::{
     DEFAULT_KEY_COL_WIDTH,
 };
 use colored::Colorize as _;
+use transcode::{
+    ContractMessageTranscoder,
+    TranscoderBuilder,
+};
 
 use anyhow::Result;
 use subxt::{

src/cmd/extrinsics/mod.rs

@@ -18,7 +18,6 @@ mod call;
 mod events;
 mod instantiate;
 mod runtime_api;
-mod transcode;
 mod upload;
 
 #[cfg(test)]
@@ -54,13 +53,13 @@ use subxt::{
     HasModuleError as _,
 };
 
-pub use self::transcode::ContractMessageTranscoder;
 pub use call::CallCommand;
 pub use instantiate::InstantiateCommand;
 pub use runtime_api::api::{
     DispatchError as RuntimeDispatchError,
     Event as RuntimeEvent,
 };
+pub use transcode::ContractMessageTranscoder;
 pub use upload::UploadCommand;
 
 type Balance = u128;

transcode/Cargo.toml

@@ -0,0 +1,49 @@
+[package]
+name = "contract-transcode"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2021"
+
+license = "Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/paritytech/cargo-contract"
+documentation = "https://docs.rs/contract-transcode"
+homepage = "https://www.substrate.io/"
+description = "Library encoding calls for smart contracts on substrate"
+keywords = ["wasm", "parity", "webassembly", "blockchain", "edsl"]
+include = ["Cargo.toml", "*.rs", "LICENSE"]
+
+[lib]
+path = "src/lib.rs"
+
+[dependencies]
+anyhow = "1.0.57"
+contract-metadata = { version = "0.6.0", path = "../metadata" }
+env_logger = "0.9.0"
+escape8259 = "0.5.1"
+hex = "0.4.3"
+indexmap = "1.8.1"
+ink_env = "3.0"
+ink_metadata = { version = "3.0", features = ["derive"] }
+itertools = "0.10.3"
+log = "0.4.17"
+nom = "7.1.1"
+nom-supreme = { version = "0.7.0", features = ["error"] }
+scale = { package = "parity-scale-codec", version = "3.0.0", features = ["derive"] }
+scale-info = { version = "2.1.1", default-features = false, features = ["derive"] }
+serde = { version = "1.0.137", default-features = false, features = ["derive"] }
+serde_json = "1.0.81"
+sp-core = "6.0.0"
+sp-runtime = "6.0.0"
+
+[dev-dependencies]
+assert_matches = "1.5.0"
+ink_lang = "3"
+ink_primitives = "3"
+ink_storage = "3"
+
+[features]
+# This `std` feature is required for testing using an inline contract's metadata, because `ink!` annotates the metadata
+# generation code with `#[cfg(feature = "std")]`.
+default = ["std"]
+std = []