Remove MergeForkBlock alias and use MergeNetSplitBlock only (#2947)

fluffy/network_metadata.nim

@@ -70,7 +70,7 @@ type
   # - `EthTime` uses std/times while chronos Moment is sufficient and more
   # sensible
   ChainConfig* = object
-    mergeForkBlock*: uint64
+    mergeNetsplitBlock*: uint64
     shanghaiTime*: Opt[Moment]
     cancunTime*: Opt[Moment]
 
@@ -81,7 +81,7 @@ const
   mergeBlockNumber* {.intdefine.}: uint64 = 15537394
 
   chainConfig* = ChainConfig(
-    mergeForkBlock: mergeBlockNumber,
+    mergeNetsplitBlock: mergeBlockNumber,
     shanghaiTime: Opt.some(Moment.init(1681338455'i64, Second)),
     cancunTime: Opt.none(Moment),
   )
@@ -93,7 +93,7 @@ func isTimestampForked(forkTime: Opt[Moment], timestamp: Moment): bool =
     forkTime.get() <= timestamp
 
 func isPoSBlock*(c: ChainConfig, blockNumber: uint64): bool =
-  c.mergeForkBlock <= blockNumber
+  c.mergeNetsplitBlock <= blockNumber
 
 func isShanghai*(c: ChainConfig, timestamp: Moment): bool =
   isTimestampForked(c.shanghaiTime, timestamp)

hive_integration/nodocker/engine/engine/fork_id.nim

@@ -40,7 +40,7 @@ method getForkConfig*(cs: ForkIDSpec): ChainConfig =
   # Merge fork happen at block 0
   let mainFork = cs.getMainFork()
   if mainFork == ForkParis:
-    forkConfig.mergeForkBlock = Opt.some(0'u64)
+    forkConfig.mergeNetsplitBlock = Opt.some(0'u64)
   return forkConfig
 
 method execute(cs: ForkIDSpec, env: TestEnv): bool =

hive_integration/nodocker/engine/engine/misc.nim

@@ -31,7 +31,7 @@ method getForkConfig*(cs: NonZeroPreMergeFork): ChainConfig =
 
   # Merge fork & pre-merge happen at block 1
   forkConfig.londonBlock = Opt.some(1'u64)
-  forkConfig.mergeForkBlock = Opt.some(1'u64)
+  forkConfig.mergeNetsplitBlock = Opt.some(1'u64)
 
   # Post-merge fork happens at block 2
   let mainFork = BaseSpec(cs).getMainFork()

nimbus/common/chain_config.nim

@@ -307,10 +307,6 @@ func toHardFork*(map: ForkTransitionTable, forkDeterminer: ForkDeterminationInfo
 proc validateChainConfig*(conf: ChainConfig): bool =
   result = true
 
-  if conf.mergeNetsplitBlock.isSome:
-    # geth compatibility
-    conf.mergeForkBlock = conf.mergeNetsplitBlock
-
   # FIXME: factor this to remove the duplication between the
   # block-based ones and the time-based ones.
 
@@ -491,7 +487,7 @@ func chainConfigForNetwork*(id: NetworkId): ChainConfig =
       muirGlacierBlock:    Opt.some(0.BlockNumber),
       berlinBlock:         Opt.some(0.BlockNumber),
       londonBlock:         Opt.some(0.BlockNumber),
-      mergeForkBlock:      Opt.some(1450409.BlockNumber),
+      mergeNetsplitBlock:  Opt.some(1450409.BlockNumber),
       terminalTotalDifficulty: Opt.some(sepoliaTTD),
       shanghaiTime:        Opt.some(1_677_557_088.EthTime),
       cancunTime:          Opt.some(1_706_655_072.EthTime), # 2024-01-30 22:51:12
@@ -512,7 +508,7 @@ func chainConfigForNetwork*(id: NetworkId): ChainConfig =
       istanbulBlock:       Opt.some(0.BlockNumber),
       berlinBlock:         Opt.some(0.BlockNumber),
       londonBlock:         Opt.some(0.BlockNumber),
-      mergeForkBlock:      Opt.some(0.BlockNumber),
+      mergeNetsplitBlock:  Opt.some(0.BlockNumber),
       terminalTotalDifficulty: Opt.some(0.u256),
       shanghaiTime:        Opt.some(1_696_000_704.EthTime),
       cancunTime:          Opt.some(1_707_305_664.EthTime), # 2024-02-07 11:34:24

nimbus/common/common.nim

@@ -336,8 +336,8 @@ proc proofOfStake*(com: CommonRef, header: Header): bool =
   if com.config.posBlock.isSome:
     # see comments of posBlock in common/hardforks.nim
     header.number >= com.config.posBlock.get
-  elif com.config.mergeForkBlock.isSome:
-    header.number >= com.config.mergeForkBlock.get
+  elif com.config.mergeNetsplitBlock.isSome:
+    header.number >= com.config.mergeNetsplitBlock.get
   else:
     # This costly check is only executed from test suite
     com.isBlockAfterTtd(header)

nimbus/common/hardforks.nim

@@ -163,11 +163,8 @@ type
     posBlock*
       {.dontSerialize.} : Opt[BlockNumber]
 
-    # mergeNetsplitBlock is an alias to mergeForkBlock
-    # and is used for geth compatibility layer
     mergeNetsplitBlock* : Opt[BlockNumber]
 
-    mergeForkBlock*     : Opt[BlockNumber]
     shanghaiTime*       : Opt[EthTime]
     cancunTime*         : Opt[EthTime]
     pragueTime*         : Opt[EthTime]
@@ -194,11 +191,7 @@ func countTimeFields(): int {.compileTime.} =
 func countBlockFields(): int {.compileTime.} =
   var z = ChainConfig()
   for name, _ in fieldPairs(z[]):
-    if name == "mergeNetsplitBlock":
-      # skip mergeForkBlock alias
-      # continue is not supported
-      discard
-    elif name.endsWith("Block"):
+    if name.endsWith("Block"):
       inc result
 
 const
@@ -217,11 +210,7 @@ func collectBlockFields(): array[blockFieldsCount, string] =
   var z = ChainConfig()
   var i = 0
   for name, _ in fieldPairs(z[]):
-    if name == "mergeNetsplitBlock":
-      # skip mergeForkBlock alias
-      # continue is not supported
-      discard
-    elif name.endsWith("Block"):
+    if name.endsWith("Block"):
       result[i] = name
       inc i
 
@@ -235,7 +224,7 @@ const
 
 func mergeForkTransitionThreshold*(conf: ChainConfig): MergeForkTransitionThreshold =
   MergeForkTransitionThreshold(
-    number: conf.mergeForkBlock,
+    number: conf.mergeNetsplitBlock,
     ttd: conf.terminalTotalDifficulty,
   )
 
@@ -280,7 +269,7 @@ func populateFromForkTransitionTable*(conf: ChainConfig, t: ForkTransitionTable)
   conf.arrowGlacierBlock   = t.blockNumberThresholds[HardFork.ArrowGlacier]
   conf.grayGlacierBlock    = t.blockNumberThresholds[HardFork.GrayGlacier]
 
-  conf.mergeForkBlock          = t.mergeForkTransitionThreshold.number
+  conf.mergeNetsplitBlock      = t.mergeForkTransitionThreshold.number
   conf.terminalTotalDifficulty = t.mergeForkTransitionThreshold.ttd
 
   conf.shanghaiTime        = t.timeThresholds[HardFork.Shanghai]

tests/test_forkid.nim

@@ -96,7 +96,7 @@ func config(shanghai, cancun: uint64): ChainConfig =
     berlinBlock:                   Opt.some(0'u64),
     londonBlock:                   Opt.some(0'u64),
     terminalTotalDifficulty:       Opt.some(0.u256),
-    mergeForkBlock:                Opt.some(0'u64),
+    mergeNetsplitBlock:            Opt.some(0'u64),
     shanghaiTime:                  Opt.some(shanghai.EthTime),
     cancunTime:                    Opt.some(cancun.EthTime),
   )

tests/test_genesis.nim

@@ -109,7 +109,6 @@ proc customGenesisTest() =
       check com.proofOfStake(com.genesisHeader) == false
       check cg.config.mergeNetsplitBlock.isSome
       check cg.config.mergeNetsplitBlock.get == 14660963.BlockNumber
-      check cg.config.mergeNetsplitBlock == cg.config.mergeForkBlock
 
     test "Holesky":
       var cg: NetworkParams

tests/test_txpool2.nim

@@ -113,7 +113,7 @@ proc initEnv(envFork: HardFork): TestEnv =
   conf.networkParams.genesis.alloc[recipient] = GenesisAccount(code: contractCode)
 
   if envFork >= MergeFork:
-    conf.networkParams.config.mergeForkBlock = Opt.some(0'u64)
+    conf.networkParams.config.mergeNetsplitBlock = Opt.some(0'u64)
     conf.networkParams.config.terminalTotalDifficulty = Opt.some(100.u256)
 
   if envFork >= Shanghai: