add totalTerminalDifficulty to MainNet and Goerli chain config

nimbus/chain_config.nim

@@ -371,6 +371,7 @@ proc chainConfigForNetwork*(id: NetworkId): ChainConfig =
 
   result = case id
   of MainNet:
+    const mainNetTTD = UInt256.fromHex("58750000000000000000000")
     ChainConfig(
       poaEngine:           false,
       chainId:             MainNet.ChainId,
@@ -395,6 +396,7 @@ proc chainConfigForNetwork*(id: NetworkId): ChainConfig =
       mergeForkBlock:      high(BlockNumber),
       shanghaiBlock:       high(BlockNumber),
       cancunBlock:         high(BlockNumber),
+      terminalTotalDifficulty: some(mainNetTTD)
     )
   of RopstenNet:
     ChainConfig(
@@ -467,6 +469,7 @@ proc chainConfigForNetwork*(id: NetworkId): ChainConfig =
       mergeForkBlock:      high(BlockNumber),
       shanghaiBlock:       high(BlockNumber),
       cancunBlock:         high(BlockNumber),
+      terminalTotalDifficulty: some(10790000.u256)
     )
   of SepoliaNet:
     ChainConfig(

tests/test_precompiles.nim

@@ -15,6 +15,7 @@ import
     vm_types,
     forks,
     constants,
+    chain_config,
     vm_precompiles,
     transaction,
     db/db_chain,
@@ -67,7 +68,8 @@ proc testFixture(fixtures: JsonNode, testStatusIMPL: var TestStatus) =
     vmState = BaseVMState.new(
       BlockHeader(blockNumber: 1.u256),
       BlockHeader(),
-      newBaseChainDB(newMemoryDB()))
+      newBaseChainDB(newMemoryDB(), config = ChainConfig())
+    )
 
   case toLowerAscii(label)
   of "ecrecover": data.doTest(vmState, fork, paEcRecover)

tests/test_rpc.nim

@@ -147,6 +147,9 @@ proc rpcMain*() =
       ks2: EthAddress = hexToByteArray[20]("0xa3b2222afa5c987da6ef773fde8d01b9f23d481f")
       ks3: EthAddress = hexToByteArray[20]("0x597176e9a64aad0845d83afdaf698fbeff77703b")
 
+    # disable POS/post Merge feature
+    chain.config.terminalTotalDifficulty = none(DifficultyInt)
+
     let keyStore = "tests" / "keystore"
     let res = ctx.am.loadKeystores(keyStore)
     if res.isErr:

tests/test_tracer_json.nim

@@ -8,7 +8,8 @@
 import
   unittest2, json, os, tables, strutils,
   eth/common, stew/byteutils, eth/trie/db,
-  ./test_helpers, ../nimbus/db/db_chain, ../nimbus/[tracer, vm_types]
+  ./test_helpers, ../nimbus/db/db_chain,
+  ../nimbus/[tracer, vm_types, chain_config]
 
 proc testFixture(node: JsonNode, testStatusIMPL: var TestStatus)
 
@@ -21,10 +22,13 @@ proc testFixture(node: JsonNode, testStatusIMPL: var TestStatus) =
   var
     blockNumber = UInt256.fromHex(node["blockNumber"].getStr())
     memoryDB = newMemoryDB()
-    chainDB = newBaseChainDB(memoryDB, false)
+    chainDB = newBaseChainDB(memoryDB, chainConfigForNetwork(MainNet))
     state = node["state"]
     receipts = node["receipts"]
 
+  # disable POS/post Merge feature
+  chainDB.config.terminalTotalDifficulty = none(DifficultyInt)
+
   for k, v in state:
     let key = hexToSeqByte(k)
     let value = hexToSeqByte(v.getStr())