params: move verkle params to their own file (#228)

params/protocol_params.go

@@ -157,13 +157,6 @@ const (
 	// up to half the consumed gas could be refunded. Redefined as 1/5th in EIP-3529
 	RefundQuotient        uint64 = 2
 	RefundQuotientEIP3529 uint64 = 5
-
-	// Verkle tree EIP: costs associated to witness accesses
-	WitnessBranchReadCost  = uint64(1900)
-	WitnessChunkReadCost   = uint64(200)
-	WitnessBranchWriteCost = uint64(3000)
-	WitnessChunkWriteCost  = uint64(500)
-	WitnessChunkFillCost   = uint64(6200)
 )
 
 // Gas discount table for BLS12-381 G1 and G2 multi exponentiation operations

params/verkle_params.go

@@ -0,0 +1,26 @@
+// Copyright 2023 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package params
+
+// Verkle tree EIP: costs associated to witness accesses
+var (
+	WitnessBranchReadCost  uint64 = 1900
+	WitnessChunkReadCost   uint64 = 200
+	WitnessBranchWriteCost uint64 = 3000
+	WitnessChunkWriteCost  uint64 = 500
+	WitnessChunkFillCost   uint64 = 6200
+)