From e864409219a11af5864171705f624038b096812d Mon Sep 17 00:00:00 2001
From: Satoshi Otomakan <satoshiotomakan8@gmail.com>
Date: Thu, 16 Nov 2023 13:46:09 +0100
Subject: [PATCH] [Cosmos]: Add fuzz test

---
 rust/tw_aptos/fuzz/Cargo.toml                |    1 -
 rust/tw_cosmos_sdk/fuzz/.gitignore           |    4 +
 rust/tw_cosmos_sdk/fuzz/Cargo.lock           | 1656 ++++++++++++++++++
 rust/tw_cosmos_sdk/fuzz/Cargo.toml           |   30 +
 rust/tw_cosmos_sdk/fuzz/fuzz_targets/sign.rs |   16 +
 5 files changed, 1706 insertions(+), 1 deletion(-)
 create mode 100644 rust/tw_cosmos_sdk/fuzz/.gitignore
 create mode 100644 rust/tw_cosmos_sdk/fuzz/Cargo.lock
 create mode 100644 rust/tw_cosmos_sdk/fuzz/Cargo.toml
 create mode 100644 rust/tw_cosmos_sdk/fuzz/fuzz_targets/sign.rs

diff --git a/rust/tw_aptos/fuzz/Cargo.toml b/rust/tw_aptos/fuzz/Cargo.toml
index 2d3506a0ea6..721a84b3ab9 100644
--- a/rust/tw_aptos/fuzz/Cargo.toml
+++ b/rust/tw_aptos/fuzz/Cargo.toml
@@ -9,7 +9,6 @@ cargo-fuzz = true
 
 [dependencies]
 libfuzzer-sys = "0.4"
-tw_number = { path = "../../tw_number" }
 tw_proto = { path = "../../tw_proto", features = ["fuzz"] }
 
 [dependencies.tw_aptos]
diff --git a/rust/tw_cosmos_sdk/fuzz/.gitignore b/rust/tw_cosmos_sdk/fuzz/.gitignore
new file mode 100644
index 00000000000..1a45eee7760
--- /dev/null
+++ b/rust/tw_cosmos_sdk/fuzz/.gitignore
@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage
diff --git a/rust/tw_cosmos_sdk/fuzz/Cargo.lock b/rust/tw_cosmos_sdk/fuzz/Cargo.lock
new file mode 100644
index 00000000000..4ec20181d3e
--- /dev/null
+++ b/rust/tw_cosmos_sdk/fuzz/Cargo.lock
@@ -0,0 +1,1656 @@
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diff --git a/rust/tw_cosmos_sdk/fuzz/Cargo.toml b/rust/tw_cosmos_sdk/fuzz/Cargo.toml
new file mode 100644
index 00000000000..519510a0a49
--- /dev/null
+++ b/rust/tw_cosmos_sdk/fuzz/Cargo.toml
@@ -0,0 +1,30 @@
+[package]
+name = "tw_cosmos_sdk-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+tw_coin_entry = { path = "../../tw_coin_entry", features = ["test-utils"] }
+tw_keypair = { path = "../../tw_keypair" }
+tw_proto = { path = "../../tw_proto", features = ["fuzz"] }
+
+[dependencies.tw_cosmos_sdk]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "sign"
+path = "fuzz_targets/sign.rs"
+test = false
+doc = false
diff --git a/rust/tw_cosmos_sdk/fuzz/fuzz_targets/sign.rs b/rust/tw_cosmos_sdk/fuzz/fuzz_targets/sign.rs
new file mode 100644
index 00000000000..af6f1bca403
--- /dev/null
+++ b/rust/tw_cosmos_sdk/fuzz/fuzz_targets/sign.rs
@@ -0,0 +1,16 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use tw_coin_entry::test_utils::test_context::TestCoinContext;
+use tw_cosmos_sdk::context::StandardCosmosContext;
+use tw_cosmos_sdk::modules::signer::tw_signer::TWSigner;
+use tw_keypair::tw::PublicKeyType;
+use tw_proto::Cosmos::Proto;
+
+fuzz_target!(|input: Proto::SigningInput<'_>| {
+    let coin = TestCoinContext::default()
+        .with_public_key_type(PublicKeyType::Secp256k1)
+        .with_hrp("cosmos");
+
+    let _ = TWSigner::<StandardCosmosContext>::sign(&coin, input);
+});