diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index f894062fa..1129f13b2 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000000604315df56e910edf0ed86fd8bbf650a2b6db18cd902f92
-0000000000000000000000000000000000000000015363b41a67d7065b4842b6
-208
+00000000000000002ec907e3046055561d34de952273cb5c5f5451eb841a7794
+000000000000000000000000000000000000000001536cf9a7bf949d803958b6
+209
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index c939f6585..d67df4c87 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000027bda5ab3f9e02f3326e43d5d5276a88522381c3c114dcb2c581d7
-00000000000000000000000000000000000000000000006e7af70d7ac29ba8db
+00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007
+00000000000000000000000000000000000000000000006e7b2431f38480a323
 55
 2
diff --git a/contrib/devtools/chainparams/bchn/chainparams_main.txt b/contrib/devtools/chainparams/bchn/chainparams_main.txt
index 1d96fe7b1..ff2b84085 100644
--- a/contrib/devtools/chainparams/bchn/chainparams_main.txt
+++ b/contrib/devtools/chainparams/bchn/chainparams_main.txt
@@ -1,4 +1,4 @@
-0000000000000000010ce4db03d1d7619883d21a30f7443041cf26b3838603d2
-00000000000000000000000000000000000000000154b80e33d3a955049b20fd
-207
+000000000000000003ef12a593a7f794970f0583bb74b03f25c7ecdc0859f371
+00000000000000000000000000000000000000000155a12b018f262393077d8b
+208
 3
diff --git a/contrib/devtools/chainparams/bchn/chainparams_test.txt b/contrib/devtools/chainparams/bchn/chainparams_test.txt
index c939f6585..d67df4c87 100644
--- a/contrib/devtools/chainparams/bchn/chainparams_test.txt
+++ b/contrib/devtools/chainparams/bchn/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000027bda5ab3f9e02f3326e43d5d5276a88522381c3c114dcb2c581d7
-00000000000000000000000000000000000000000000006e7af70d7ac29ba8db
+00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007
+00000000000000000000000000000000000000000000006e7b2431f38480a323
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index f03a4050b..01c739412 100644
--- a/src/networks/abc/chainparamsconstants.cpp
+++ b/src/networks/abc/chainparamsconstants.cpp
@@ -1,18 +1,18 @@
 /**
  * @generated by contrib/devtools/chainparams/generate_chainparams_constants.py
  */
 
 #include <chainparamsconstants.h>
 
 namespace ChainParamsConstants {
-    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000604315df56e910edf0ed86fd8bbf650a2b6db18cd902f92");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015363b41a67d7065b4842b6");
-    const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 208;
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000002ec907e3046055561d34de952273cb5c5f5451eb841a7794");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000001536cf9a7bf949d803958b6");
+    const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 209;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000027bda5ab3f9e02f3326e43d5d5276a88522381c3c114dcb2c581d7");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7af70d7ac29ba8db");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7b2431f38480a323");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants
 
diff --git a/src/networks/bchn/chainparamsconstants.cpp b/src/networks/bchn/chainparamsconstants.cpp
index 3a6c86a43..9250786fd 100644
--- a/src/networks/bchn/chainparamsconstants.cpp
+++ b/src/networks/bchn/chainparamsconstants.cpp
@@ -1,18 +1,18 @@
 /**
  * @generated by contrib/devtools/chainparams/generate_chainparams_constants.py
  */
 
 #include <chainparamsconstants.h>
 
 namespace ChainParamsConstants {
-    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000010ce4db03d1d7619883d21a30f7443041cf26b3838603d2");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000154b80e33d3a955049b20fd");
-    const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 207;
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000003ef12a593a7f794970f0583bb74b03f25c7ecdc0859f371");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000155a12b018f262393077d8b");
+    const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 208;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000027bda5ab3f9e02f3326e43d5d5276a88522381c3c114dcb2c581d7");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7af70d7ac29ba8db");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7b2431f38480a323");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants