Add support for seed phrase

Author: tupui

pyproject.toml

@@ -92,5 +92,5 @@ testpaths = [
     "tests",
 ]
 
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 "**/__init__.py" = ["F403", "F405"]

src/soroban/models.py

@@ -27,6 +27,7 @@ def _load_configuration(id: str | pathlib.Path, kind: Literal["identity", "netwo
 
 
 class Identity(BaseSettings):
+    seed_phrase: str | None = None
     secret_key: str | None = None
     public_key: str | None = None
     keypair: Keypair | None = None
@@ -35,15 +36,21 @@ class Identity(BaseSettings):
 
     @model_validator(mode="after")
     def load_keys(self) -> "Identity":
-        if self.keypair is None and self.secret_key is None:
+        if (
+            self.keypair is None
+            and self.secret_key is None
+            and self.seed_phrase is None
+        ):
             raise ValueError(
-                "Either provide a secret key or a Keypair object. Also look"
+                "Either provide a seed phrase, secret key or a Keypair object. Also look"
                 "in 'identity.toml'"
             )
         if self.keypair is not None:
             self.secret_key = self.keypair.secret
-        else:
+        elif self.secret_key is not None:
             self.keypair = Keypair.from_secret(self.secret_key)
+        else:
+            self.keypair = Keypair.from_mnemonic_phrase(self.seed_phrase)
         self.public_key = self.keypair.public_key
         return self
 

tests/test_models.py

@@ -31,11 +31,12 @@ def test_from_source_account(self):
 
     def test_raises(self):
         os.chdir(pathlib.Path(__file__).parent.parent)
-        with pytest.raises(ValueError, match="provide a secret key or a Keypair"):
+        msg = "Either provide a seed phrase, secret key"
+        with pytest.raises(ValueError, match=msg):
             soroban.Identity()
 
         keypair = Keypair.random()
-        with pytest.raises(ValueError, match="provide a secret key or a Keypair"):
+        with pytest.raises(ValueError, match=msg):
             soroban.Identity(public_key=keypair.public_key)