Check if constantinople hard fork is active in the SHL/SHR/SAR implementation

Author: axic

lib/opFns.js

@@ -158,18 +158,27 @@ module.exports = {
     return new BN(word.shrn((31 - pos.toNumber()) * 8).andln(0xff))
   },
   SHL: function (a, b, runState) {
+    if (!runState._common.hardforkIsActiveOnBlock("constantinople", runState.block.header.number)) {
+      trap(ERROR.INVALID_OPCODE)
+    }
     if (a.gten(256)) {
       return new BN(0)
     }
     return b.shln(a.toNumber())
   },
   SHR: function (a, b, runState) {
+    if (!runState._common.hardforkIsActiveOnBlock("constantinople", runState.block.header.number)) {
+      trap(ERROR.INVALID_OPCODE)
+    }
     if (a.gten(256)) {
       return new BN(0)
     }
     return b.shrn(a.toNumber())
   },
   SAR: function (a, b, runState) {
+    if (!runState._common.hardforkIsActiveOnBlock("constantinople", runState.block.header.number)) {
+      trap(ERROR.INVALID_OPCODE)
+    }
     b = b.fromTwos(256)
     if (a.gten(256)) {
       if (b.ltn(0)) {