diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 1129f13b2..3455c2062 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000002ec907e3046055561d34de952273cb5c5f5451eb841a7794
-000000000000000000000000000000000000000001536cf9a7bf949d803958b6
+00000000000000000823f7172d4fdd74457434e721ee798fcbd15d19a0c088e7
+0000000000000000000000000000000000000000015377edc8d668e58b0dc2c5
 209
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index d67df4c87..e625a466c 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007
-00000000000000000000000000000000000000000000006e7b2431f38480a323
+00000000002834e464c106c67bd88729850cdfe25b37d562a21b05d769e0393b
+00000000000000000000000000000000000000000000006e7d3307aac824d6f2
 55
 2
diff --git a/contrib/devtools/chainparams/bchn/chainparams_main.txt b/contrib/devtools/chainparams/bchn/chainparams_main.txt
index ff2b84085..7ed14f814 100644
--- a/contrib/devtools/chainparams/bchn/chainparams_main.txt
+++ b/contrib/devtools/chainparams/bchn/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000003ef12a593a7f794970f0583bb74b03f25c7ecdc0859f371
-00000000000000000000000000000000000000000155a12b018f262393077d8b
+000000000000000003230276d61bcb89b37d152449b3031f27b4a6ec40a33269
+000000000000000000000000000000000000000001568e2a4dee7ff865c05cce
 208
 3
diff --git a/contrib/devtools/chainparams/bchn/chainparams_test.txt b/contrib/devtools/chainparams/bchn/chainparams_test.txt
index d67df4c87..e625a466c 100644
--- a/contrib/devtools/chainparams/bchn/chainparams_test.txt
+++ b/contrib/devtools/chainparams/bchn/chainparams_test.txt
@@ -1,4 +1,4 @@
-00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007
-00000000000000000000000000000000000000000000006e7b2431f38480a323
+00000000002834e464c106c67bd88729850cdfe25b37d562a21b05d769e0393b
+00000000000000000000000000000000000000000000006e7d3307aac824d6f2
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 01c739412..0060a3055 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("00000000000000002ec907e3046055561d34de952273cb5c5f5451eb841a7794");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000001536cf9a7bf949d803958b6");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000823f7172d4fdd74457434e721ee798fcbd15d19a0c088e7");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015377edc8d668e58b0dc2c5");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 209;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7b2431f38480a323");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000002834e464c106c67bd88729850cdfe25b37d562a21b05d769e0393b");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7d3307aac824d6f2");
     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 9250786fd..5a438aa1b 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("000000000000000003ef12a593a7f794970f0583bb74b03f25c7ecdc0859f371");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000155a12b018f262393077d8b");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000003230276d61bcb89b37d152449b3031f27b4a6ec40a33269");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000001568e2a4dee7ff865c05cce");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 208;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000e8047a8ced366997711066e5fe2074926f79e209de399c1c48007");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7b2431f38480a323");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000002834e464c106c67bd88729850cdfe25b37d562a21b05d769e0393b");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7d3307aac824d6f2");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants