feat(signer): adds signer-stronghold

Cargo.toml

@@ -63,6 +63,7 @@ alloy-signer-aws = { version = "0.15", path = "crates/signer-aws", default-featu
 alloy-signer-gcp = { version = "0.15", path = "crates/signer-gcp", default-features = false }
 alloy-signer-ledger = { version = "0.15", path = "crates/signer-ledger", default-features = false }
 alloy-signer-local = { version = "0.15", path = "crates/signer-local", default-features = false }
+alloy-signer-stronghold = { version = "0.15", path = "crates/signer-stronghold", default-features = false }
 alloy-signer-trezor = { version = "0.15", path = "crates/signer-trezor", default-features = false }
 alloy-transport = { version = "0.15", path = "crates/transport", default-features = false }
 alloy-transport-http = { version = "0.15", path = "crates/transport-http", default-features = false }

crates/signer-stronghold/.gitignore

@@ -0,0 +1,3 @@
+/target
+*.stronghold
+*.env

crates/signer-stronghold/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "alloy-signer-stronghold"
+description = "An Ethereum signer for a Stronghold"
+
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+authors.workspace = true
+license.workspace = true
+homepage.workspace = true
+repository.workspace = true
+exclude.workspace = true
+
+[dependencies]
+alloy-consensus.workspace = true
+alloy-network.workspace = true 
+alloy-primitives = { workspace = true, features = ["k256"] }
+alloy-signer.workspace = true 
+async-trait.workspace = true 
+iota_stronghold = "2.1.0"
+k256 = { version = "0.13.4", features = ["ecdsa"] }
+thiserror.workspace = true 
+tracing.workspace = true
+
+[dev-dependencies]
+alloy-network.workspace = true 
+alloy-provider = { workspace = true, features = ["anvil-api", "debug-api", "hyper"] }
+alloy-node-bindings = { workspace = true }
+alloy-rpc-types = { workspace = true, features = ["eth"] }
+tokio = { workspace = true, features = ["rt", "rt-multi-thread"] }

crates/signer-stronghold/LICENSE-MIT

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

crates/signer-stronghold/README.md

@@ -0,0 +1,58 @@
+# signer-stronghold
+
+An Ethereum [signer](https://docs.rs/alloy-signer/latest/alloy_signer/trait.Signer.html) for a Stronghold.
+
+## What is a Stronghold?
+
+From [the documentation](https://github.com/iotaledger/stronghold.rs/blob/iota-stronghold-v2.1.0/client/src/types/stronghold.rs#L77-L82):
+
+> The Stronghold is a secure storage for sensitive data. Secrets that are stored inside
+> a Stronghold can never be read, but only be accessed via cryptographic procedures. Data inside
+> a Stronghold is heavily protected by the `Runtime` by either being encrypted at rest, having
+> kernel supplied memory guards, that prevent memory dumps, or a combination of both. The Stronghold
+> also persists data written into a Stronghold by creating Snapshots of the current state. The
+> Snapshot itself is encrypted and can be accessed by a key.
+
+[Learn more here](https://github.com/iotaledger/stronghold.rs/tree/iota-stronghold-v2.1.0)
+
+
+## Usage
+
+```bash
+## treat this environment variable with the same care as a private key
+
+export PASSPHRASE=$(openssl rand -hex 48) # or whatever you want
+```
+
+### Basic Usage
+
+```rust
+use signer_stronghold::StrongholdSigner;
+
+let chain_id = Some(1);
+let signer = StrongholdSigner::new(chain_id).unwrap();
+
+let message = vec![0, 1, 2, 3];
+
+let sig = signer.sign_message(&message).await.unwrap();
+assert_eq!(sig.recover_address_from_msg(message).unwrap(), signer.address());
+```
+
+### With Custom Path
+
+```rust
+use signer_stronghold::StrongholdSigner;
+use std::path::PathBuf;
+
+let chain_id = Some(1);
+let custom_path = PathBuf::from("/path/to/my_custom.stronghold");
+let signer = StrongholdSigner::new_from_path(custom_path, chain_id).unwrap();
+
+// Use signer just like the default one
+let message = vec![0, 1, 2, 3];
+let sig = signer.sign_message(&message).await.unwrap();
+```
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE-MIT](LICENSE-MIT) file for details.

crates/signer-stronghold/src/lib.rs

@@ -0,0 +1,10 @@
+#![doc = include_str!("../README.md")]
+#![doc(
+    html_logo_url = "https://raw.githubusercontent.com/alloy-rs/core/main/assets/alloy.jpg",
+    html_favicon_url = "https://raw.githubusercontent.com/alloy-rs/core/main/assets/favicon.ico"
+)]
+#![cfg_attr(not(test), warn(unused_crate_dependencies))]
+#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
+
+mod signer;
+pub use signer::StrongholdSigner;