[ETCM-20] Repricing for trie-size-dependent opcodes

src/main/scala/io/iohk/ethereum/vm/EvmConfig.scala

@@ -264,7 +264,10 @@ object FeeSchedule {
 
   class AghartaFeeSchedule extends ByzantiumFeeSchedule
 
-  class PhoenixFeeSchedule extends AghartaFeeSchedule
+  class PhoenixFeeSchedule extends AghartaFeeSchedule{
+    override val G_sload: BigInt = 800
+    override val G_balance: BigInt = 700
+  }
 
 }
 

src/main/scala/io/iohk/ethereum/vm/OpCode.scala

@@ -169,7 +169,7 @@ object OpCodes {
     List(EXTCODEHASH, CREATE2, SHL, SHR, SAR) ++ ByzantiumOpCodes
 
   val PhoenixOpCodes: List[OpCode] =
-    List(CHAINID) ++ ConstantinopleOpCodes
+    List(CHAINID, SELFBALANCE) ++ ConstantinopleOpCodes
 }
 
 object OpCode {
@@ -1157,3 +1157,10 @@ case object SELFDESTRUCT extends OpCode(0xff, 1, 0, _.G_selfdestruct) {
 }
 
 case object CHAINID extends ConstOp(0x46)(state => UInt256(state.env.evmConfig.blockchainConfig.chainId))
+
+case object SELFBALANCE extends OpCode(0x47, 0, 1, _.G_low) with ConstGas {
+  protected def exec[W <: WorldStateProxy[W, S], S <: Storage[S]](state: ProgramState[W, S]): ProgramState[W, S] = {
+    val stack2 = state.stack.push(state.ownBalance)
+    state.withStack(stack2).step()
+  }
+}

src/test/scala/io/iohk/ethereum/vm/Generators.scala

@@ -87,7 +87,7 @@ object Generators extends ObjectGenerators {
     inputDataGen: Gen[ByteString] = getByteStringGen(0, 0),
     valueGen: Gen[UInt256] = getUInt256Gen(),
     blockNumberGen: Gen[UInt256] = getUInt256Gen(0, 300),
-    evmConfig: EvmConfig = EvmConfig.ConstantinopleConfigBuilder(blockchainConfig),
+    evmConfig: EvmConfig = EvmConfig.PhoenixConfigBuilder(blockchainConfig),
     returnDataGen: Gen[ByteString] = getByteStringGen(0, 0)
   ): Gen[PS] =
     for {

src/test/scala/io/iohk/ethereum/vm/OpCodeFunSpec.scala

@@ -819,6 +819,16 @@ class OpCodeFunSpec extends FunSuite with OpCodeTesting with Matchers with Prope
     }
   }
 
+  test(SELFBALANCE) { op =>
+    forAll(getProgramStateGen()) { stateIn =>
+      val stateOut = executeOp(op, stateIn)
+      val balance = stateOut.ownBalance
+      withStackVerification(op, stateIn, stateOut) {
+        stateOut shouldEqual stateIn.withStack(stateIn.stack.push(balance)).step()
+      }
+    }
+  }
+
   verifyAllOpCodesRegistered(except = CREATE, CREATE2, CALL, CALLCODE, DELEGATECALL, STATICCALL, SHL, SHR, SAR)
 
   test("sliceBytes helper") {

src/test/scala/io/iohk/ethereum/vm/OpCodeGasSpec.scala

@@ -10,7 +10,7 @@ import org.scalacheck.Gen
 
 class OpCodeGasSpec extends FunSuite with OpCodeTesting with Matchers with PropertyChecks {
 
-  override val config = EvmConfig.ConstantinopleConfigBuilder(blockchainConfig)
+  override val config = EvmConfig.PhoenixConfigBuilder(blockchainConfig)
 
   import config.feeSchedule._
 
@@ -61,7 +61,8 @@ class OpCodeGasSpec extends FunSuite with OpCodeTesting with Matchers with Prope
     JUMPDEST -> G_jumpdest,
     SHL -> G_verylow,
     SHR -> G_verylow,
-    SAR -> G_verylow
+    SAR -> G_verylow,
+    SELFBALANCE -> G_low
   ) ++ stackOpsFees ++ constOpsFees