Add Keypair.from_seed_and_derivation_path

.github/workflows/build.yml

@@ -36,7 +36,7 @@ jobs:
           maturin-version: ${{ env.maturin_version }}
       - name: Install built wheel
         run: |
-          pip install pytest pytest-asyncio based58 pybip39 typing-extensions jsonalias
+          pip install pytest pytest-asyncio based58 pybip39 mnemonic typing-extensions jsonalias
           pip install ${{ env.name }} --no-index --no-dependencies --find-links dist --force-reinstall
           pytest
 
@@ -61,7 +61,7 @@ jobs:
           maturin-version: ${{ env.maturin_version }}
       - name: Install built wheel
         run: |
-          pip install pytest pytest-asyncio based58 pybip39 typing-extensions jsonalias
+          pip install pytest pytest-asyncio based58 pybip39 mnemonic typing-extensions jsonalias
           pip install ${{ env.name }} --no-index --no-dependencies --find-links dist --force-reinstall
           pytest
       - name: Upload wheels
@@ -92,7 +92,7 @@ jobs:
           maturin-version: ${{ env.maturin_version }}
       - name: Install built wheel
         run: |
-          python -m pip install pytest pytest-asyncio based58 pybip39 typing-extensions jsonalias
+          python -m pip install pytest pytest-asyncio based58 pybip39 mnemonic typing-extensions jsonalias
           python -m pip install ${{ env.name }} --no-index --no-dependencies --find-links dist --force-reinstall
           python -m pytest --ignore=tests/bankrun
       - name: Upload wheels
@@ -125,7 +125,7 @@ jobs:
       - name: Install built wheel
         if: matrix.target == 'x86_64'
         run: |
-          pip install pytest pytest-asyncio based58 pybip39 typing-extensions jsonalias
+          pip install pytest pytest-asyncio based58 pybip39 mnemonic typing-extensions jsonalias
           pip install ${{ env.name }} --no-index --no-dependencies --find-links dist --force-reinstall
           pytest
       - name: Upload wheels
@@ -189,7 +189,7 @@ jobs:
           options: -v ${{ github.workspace }}:/io -w /io
           run: |
             apk add py3-pip
-            pip3 install -U pip pytest pytest-asyncio based58 pybip39 typing-extensions jsonalias --break-system-packages
+            pip3 install -U pip pytest pytest-asyncio based58 pybip39 mnemonic typing-extensions jsonalias --break-system-packages
             pip3 install ${{ env.name }} --find-links /io/dist/ --force-reinstall --no-index --no-dependencies --break-system-packages
             python3 -m pytest
       - name: Upload wheels

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Added
+
+- Add `Keypair.from_seed_and_derivation_path` [(#75)](https://github.com/kevinheavey/solders/pull/75)
+
 ### Fixed
 
 - Fix (de)serialization of Account `owner` field [(#70)](https://github.com/kevinheavey/solders/pull/70)

README.md

@@ -4,8 +4,6 @@
 
 ---
 
-[![Actions
-Status](https://github.com/kevinheavey/solders/workflows/CI/badge.svg)](https://github.com/kevinheavey/solders/actions?query=workflow%3ACI)
 [![PyPI version](https://badge.fury.io/py/solders.svg)](https://badge.fury.io/py/solders)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://github.com/kevinheavey/solders/blob/main/LICENSE)
 

crates/keypair/src/lib.rs

@@ -1,11 +1,15 @@
 use derive_more::{From, Into};
 use pyo3::{prelude::*, types::PyBytes};
 use serde::{Deserialize, Serialize};
-use solana_sdk::signer::{
-    keypair::{
-        keypair_from_seed, keypair_from_seed_phrase_and_passphrase, Keypair as KeypairOriginal,
+use solana_sdk::{
+    derivation_path::DerivationPath,
+    signature::keypair_from_seed_and_derivation_path,
+    signer::{
+        keypair::{
+            keypair_from_seed, keypair_from_seed_phrase_and_passphrase, Keypair as KeypairOriginal,
+        },
+        Signer as SignerTrait,
     },
-    Signer as SignerTrait,
 };
 use solders_macros::{common_methods, pyhash, richcmp_signer};
 use solders_pubkey::Pubkey;
@@ -193,6 +197,30 @@ impl Keypair {
         handle_py_value_err(keypair_from_seed(&seed))
     }
 
+    #[staticmethod]
+    /// Generate a keypair from a 32-byte seed and derivation path..
+    ///
+    /// Args:
+    ///     seed (bytes): 32-byte seed.
+    ///     dpath (str): derivation path.
+    /// Returns:
+    ///     Keypair: The generated keypair.
+    ///
+    /// Example:
+    ///     >>> from solders.keypair import Keypair
+    ///     >>> from solders.pubkey import Pubkey
+    ///     >>> seed_bytes = bytes([0] * 64)
+    ///     >>> account_index = 0
+    ///     >>> derivation_path = f"m/44'/501'/0'/{account_index}'"
+    ///     >>> from_seed = Keypair.from_seed_and_derivation_path(seed_bytes, derivation_path)
+    ///
+    pub fn from_seed_and_derivation_path(seed: [u8; 64], dpath: &str) -> PyResult<Self> {
+        handle_py_value_err(keypair_from_seed_and_derivation_path(
+            &seed,
+            Some(DerivationPath::from_absolute_path_str(dpath).unwrap()),
+        ))
+    }
+
     #[staticmethod]
     /// Generate a keypair from a seed phrase and passphrase.
     ///

noxfile.py

@@ -14,6 +14,7 @@ def python(session):
         "typing-extensions",
         "jsonalias",
         "myst-parser",
+        "mnemonic",
     )
     session.install(".", "--no-build-isolation")
     session.run("make", "test", external=True)

pyproject.toml

@@ -17,6 +17,7 @@ based58 = "0.1.1"
 bumpversion = "0.6.0"
 "jsonalias" = "0.1.1"
 ruff = "0.1.6"
+mnemonic = "0.20"
 mypy = "0.991"
 pytest = "7.2.1"
 pytest-asyncio = "^0.20.3"

python/solders/keypair.pyi

@@ -12,6 +12,10 @@ class Keypair:
     @staticmethod
     def from_seed(seed: Union[bytes, Sequence[int]]) -> "Keypair": ...
     @staticmethod
+    def from_seed_and_derivation_path(
+        seed: Union[bytes, Sequence[int]], dpath: str
+    ) -> "Keypair": ...
+    @staticmethod
     def from_base58_string(s: str) -> "Keypair": ...
     @staticmethod
     def from_seed_phrase_and_passphrase(

tests/test_account.py

@@ -21,6 +21,7 @@ def test_pickle(account: Account) -> None:
 def test_json(account: Account) -> None:
     assert Account.from_json(account.to_json()) == account
 
+
 def test_account_from_json() -> None:
     # https://github.com/kevinheavey/solders/issues/69
     raw = """{

tests/test_keypair.py

@@ -2,11 +2,21 @@
 from operator import ge, gt, le, lt
 from typing import Any, Callable
 
+import mnemonic
 from pybip39 import Mnemonic, Seed
 from pytest import mark, raises
 from solders.keypair import Keypair
 
 
+def test_from_seed_and_derivation_path() -> None:
+    mnemo = mnemonic.Mnemonic("english")
+    seed = mnemo.to_seed(
+        "pill tomorrow foster begin walnut borrow virtual kick shift mutual shoe scatter"
+    )
+    pubkey = Keypair.from_seed_and_derivation_path(seed, "m/44'/501'/0'/0'").pubkey()
+    assert str(pubkey) == "5F86TNSTre3CYwZd1wELsGQGhqG2HkN3d8zxhbyBSnzm"
+
+
 def test_from_bytes() -> None:
     raw_bytes = (
         b"\x99\xda\x95Y\xe1^\x91>\xe9\xab.S\xe3\xdf\xadW]\xa3;I\xbe\x11%\xbb\x92.3IOI"

tests/test_rpc_responses.py

@@ -1191,6 +1191,7 @@ def test_get_program_accounts_without_context() -> None:
         pubkey=Pubkey.from_string("CxELquR1gPP8wHe33gZ4QxqGB3sZ9RSwsJ2KshVewkFY"),
     )
 
+
 def test_keyed_account_from_json() -> None:
     raw = """{
     "pubkey": "7wZpAKYM1uygtosoF42V4a5tVLsrzpSN6Uedaxc6vGrQ",