Initial commit: snapshot of spesmilo/electrumx 2.0.0

Unmodified source tree of upstream commit 280cb339aa158e099eb936033eecd15719770651
("Merge pull request #389 from SomberNight/202607_release_2_0",
https://github.com/spesmilo/electrumx, release 2.0.0, 3 July 2026).

All Palladium-specific changes are in the commits that follow.

tests/server/test_api.py

@@ -0,0 +1,108 @@
+import asyncio
+from unittest import mock
+
+from aiorpcx import RPCError
+from electrumx import Controller, Env
+
+loop = asyncio.new_event_loop()
+
+
+def set_env():
+    env = mock.create_autospec(Env)
+    env.coin = mock.Mock()
+    env.coin.SESSIONCLS.protocol_min_max_strings = lambda : ["1.1", "1.4"]
+    env.loop_policy = None
+    env.max_sessions = 0
+    env.max_subs = 0
+    env.max_send = 0
+    env.bandwidth_limit = 0
+    env.identities = ''
+    env.tor_proxy_host = env.tor_proxy_port = None
+    env.peer_discovery = env.PD_SELF = False
+    env.daemon_url = 'http://localhost:8000/'
+    return env
+
+
+async def coro(res):
+    return res
+
+
+def raise_exception(msg):
+    raise RPCError(1, msg)
+
+
+def ensure_text_exception(test, exception):
+    res = err = None
+    try:
+        res = loop.run_until_complete(test)
+    except Exception as e:
+        err = e
+    assert isinstance(err, exception), (res, err)
+
+
+def test_dummy():
+    assert True
+
+def _test_transaction_get():
+    async def test_verbose_ignore_by_backend():
+        env = set_env()
+        sut = Controller(env)
+        sut.daemon_request = mock.Mock()
+        sut.daemon_request.return_value = coro('11'*32)
+        res = await sut.transaction_get('ff'*32, True)
+        assert res == '11'*32
+
+    async def test_verbose_ok():
+        env = set_env()
+        sut = Controller(env)
+        sut.daemon_request = mock.Mock()
+        response = {
+            "hex": "00"*32,
+            "blockhash": "ff"*32
+        }
+        sut.daemon_request.return_value = coro(response)
+        res = await sut.transaction_get('ff'*32, True)
+        assert res == response
+
+        response = {
+            "hex": "00"*32,
+            "blockhash": None
+        }
+        sut.daemon_request.return_value = coro(response)
+        res = await sut.transaction_get('ff'*32, True)
+        assert res == response
+
+    async def test_no_verbose():
+        env = set_env()
+        sut = Controller(env)
+        sut.daemon_request = mock.Mock()
+        response = 'cafebabe'*64
+        sut.daemon_request.return_value = coro(response)
+        res = await sut.transaction_get('ff'*32)
+        assert res == response
+
+    async def test_verbose_failure():
+        env = set_env()
+        sut = Controller(env)
+        sut.daemon_request = mock.Mock()
+        sut.daemon_request.return_value = coro(
+            raise_exception('some unhandled error'))
+        await sut.transaction_get('ff' * 32, True)
+
+    async def test_wrong_txhash():
+        env = set_env()
+        sut = Controller(env)
+        sut.daemon_request = mock.Mock()
+        await sut.transaction_get('cafe')
+        sut.daemon_request.assert_not_called()
+
+    loop.run_until_complete(asyncio.gather(
+        *[
+            test_verbose_ignore_by_backend(),
+            test_verbose_ok(),
+            test_no_verbose()
+        ]
+    ))
+
+    for error_test in [test_verbose_failure, test_wrong_txhash]:
+        ensure_text_exception(error_test(), RPCError)