Make RandomX block templates activation-aware

test/functional/mining_randomx_gbt.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+# Copyright (c) 2026 The Vexta Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+"""Test activation-aware RandomX getblocktemplate handling."""
+
+from test_framework.blocktools import NORMAL_GBT_REQUEST_PARAMS
+from test_framework.test_framework import DigiByteTestFramework
+from test_framework.util import assert_equal, assert_raises_rpc_error
+
+
+BLOCK_VERSION_ALGO = 15 << 8
+BLOCK_VERSION_SHA256D = 2 << 8
+BLOCK_VERSION_RANDOMX = 4 << 8
+
+
+class RandomXGetBlockTemplateTest(DigiByteTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+        self.setup_clean_chain = True
+        self.supports_cli = False
+
+    def run_test(self):
+        node = self.nodes[0]
+
+        self.log.info("RandomX GBT is rejected before activation")
+        assert_raises_rpc_error(
+            -8,
+            "RandomX is not active yet",
+            node.getblocktemplate,
+            NORMAL_GBT_REQUEST_PARAMS,
+            "randomx",
+        )
+
+        self.log.info("Default GBT remains SHA256D before activation")
+        sha_template = node.getblocktemplate(NORMAL_GBT_REQUEST_PARAMS)
+        assert_equal(sha_template["height"], 1)
+        assert_equal(
+            sha_template["version"] & BLOCK_VERSION_ALGO,
+            BLOCK_VERSION_SHA256D,
+        )
+
+        self.log.info("Activate RandomX at block 1 on regtest only")
+        self.restart_node(0, extra_args=["-testactivationheight=randomx@1"])
+        node = self.nodes[0]
+
+        self.log.info("RandomX GBT is available exactly at activation height")
+        randomx_template = node.getblocktemplate(
+            NORMAL_GBT_REQUEST_PARAMS,
+            "randomx",
+        )
+        assert_equal(randomx_template["height"], 1)
+        assert_equal(
+            randomx_template["version"] & BLOCK_VERSION_ALGO,
+            BLOCK_VERSION_RANDOMX,
+        )
+
+        self.log.info("Default GBT remains SHA256D after RandomX activation")
+        sha_template = node.getblocktemplate(NORMAL_GBT_REQUEST_PARAMS)
+        assert_equal(sha_template["height"], 1)
+        assert_equal(
+            sha_template["version"] & BLOCK_VERSION_ALGO,
+            BLOCK_VERSION_SHA256D,
+        )
+
+
+if __name__ == "__main__":
+    RandomXGetBlockTemplateTest().main()

test/functional/test_runner.py

@@ -94,6 +94,7 @@ BASE_SCRIPTS = [
     'wallet_backup.py --descriptors',
     # vv Tests less than 5m vv
     'mining_getblocktemplate_longpoll.py',
+    'mining_randomx_gbt.py',
     'feature_maxuploadtarget.py',
     'feature_block.py',
     'rpc_fundrawtransaction.py --legacy-wallet',