From c5db4e5ad6a6ad2b5879cb88976f8a2d3e868902 Mon Sep 17 00:00:00 2001
From: Jeeyong Um <conr2d@proton.me>
Date: Thu, 1 Aug 2024 03:46:04 +0900
Subject: [PATCH] cosmos-sdk-proto: add support for `no_std` (#478)

---
 cosmos-sdk-proto/Cargo.toml    | 7 ++++---
 cosmos-sdk-proto/src/lib.rs    | 3 +++
 cosmos-sdk-proto/src/traits.rs | 3 ++-
 cosmrs/Cargo.toml              | 2 +-
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/cosmos-sdk-proto/Cargo.toml b/cosmos-sdk-proto/Cargo.toml
index 2c66ba03..329e404d 100644
--- a/cosmos-sdk-proto/Cargo.toml
+++ b/cosmos-sdk-proto/Cargo.toml
@@ -16,8 +16,8 @@ edition = "2021"
 rust-version = "1.72"
 
 [dependencies]
-prost = "0.13"
-prost-types = "0.13"
+prost = { version = "0.13", default-features = false }
+prost-types = { version = "0.13", default-features = false }
 tendermint-proto = "0.38"
 
 # Optional dependencies
@@ -25,7 +25,8 @@ tonic = { version = "0.12", optional = true, default-features = false, features
 
 [features]
 default = ["grpc-transport"]
-grpc = ["tonic"]
+std = ["prost/std", "prost-types/std"]
+grpc = ["std", "tonic"]
 grpc-transport = ["grpc", "tonic/transport"]
 cosmwasm = []
 
diff --git a/cosmos-sdk-proto/src/lib.rs b/cosmos-sdk-proto/src/lib.rs
index 53246eaa..f866a5ff 100644
--- a/cosmos-sdk-proto/src/lib.rs
+++ b/cosmos-sdk-proto/src/lib.rs
@@ -10,6 +10,9 @@
 )]
 #![forbid(unsafe_code)]
 #![warn(trivial_casts, trivial_numeric_casts, unused_import_braces)]
+#![cfg_attr(not(feature = "std"), no_std)]
+
+extern crate alloc;
 
 pub mod traits;
 mod type_names;
diff --git a/cosmos-sdk-proto/src/traits.rs b/cosmos-sdk-proto/src/traits.rs
index 1484fa50..a9ac8722 100644
--- a/cosmos-sdk-proto/src/traits.rs
+++ b/cosmos-sdk-proto/src/traits.rs
@@ -2,8 +2,9 @@
 
 pub use prost::{Message, Name};
 
+use alloc::{string::String, vec::Vec};
+use core::str::FromStr;
 use prost::EncodeError;
-use std::str::FromStr;
 
 /// Extension trait for [`Message`].
 pub trait MessageExt: Message {
diff --git a/cosmrs/Cargo.toml b/cosmrs/Cargo.toml
index 01b6bf5a..081b2dd3 100644
--- a/cosmrs/Cargo.toml
+++ b/cosmrs/Cargo.toml
@@ -12,7 +12,7 @@ edition = "2021"
 rust-version = "1.72"
 
 [dependencies]
-cosmos-sdk-proto = { version = "=0.23.0-pre", default-features = false, path = "../cosmos-sdk-proto" }
+cosmos-sdk-proto = { version = "=0.23.0-pre", default-features = false, features = ["std"], path = "../cosmos-sdk-proto" }
 ecdsa = "0.16"
 eyre = "0.6"
 k256 = { version = "0.13", default-features = false, features = ["ecdsa", "sha256"] }