common: added new isActivatedEIP() method

Author: holgerd77

packages/common/src/eips/2315.json

@@ -4,7 +4,7 @@
   "comment": "Simple subroutines for the EVM",
   "url": "https://eips.ethereum.org/EIPS/eip-2315",
   "status": "Draft",
-  "minimumHardfork": "berlin",
+  "minimumHardfork": "istanbul",
   "gasConfig": {},
   "gasPrices": {
     "beginsub": {

packages/common/src/index.ts

@@ -370,6 +370,30 @@ export default class Common extends EventEmitter {
     return this.paramByHardfork(topic, name, hardfork)
   }
 
+  /**
+   * Checks if an EIP is activated by either being included in the EIPs
+   * manually passed in with the `eips` constructor option or in a
+   * hardfork currently being active
+   *
+   * Note: this method only works for EIPs being supported
+   * by the `eips` constructor option
+   * @param eip
+   */
+  isActivatedEIP(eip: number): boolean {
+    if (this.eips().includes(eip)) {
+      return true
+    }
+    for (const hfChanges of HARDFORK_CHANGES) {
+      const hf = hfChanges[1]
+      if (this.gteHardfork(hf['name']) && 'eips' in hf) {
+        if (hf['eips'].includes(eip)) {
+          return true
+        }
+      }
+    }
+    return false
+  }
+
   /**
    * Checks if set or provided hardfork is active on block number
    * @param hardfork Hardfork name or null (for HF set)

packages/common/tests/eips.spec.ts

@@ -32,4 +32,16 @@ tape('[Common]: Initialization / Chain params', function (t: tape.Test) {
 
     st.end()
   })
+
+  t.test('isActivatedEIP()', function (st) {
+    let c = new Common({ chain: 'rinkeby', hardfork: 'istanbul' })
+    st.equal(c.isActivatedEIP(2315), false, 'istanbul, eips: [] -> false (EIP-2315)')
+    c = new Common({ chain: 'rinkeby', hardfork: 'istanbul', eips: [2315] })
+    st.equal(c.isActivatedEIP(2315), true, 'istanbul, eips: [2315] -> true (EIP-2315)')
+    c = new Common({ chain: 'rinkeby', hardfork: 'berlin' })
+    st.equal(c.isActivatedEIP(2315), true, 'berlin, eips: [] -> true (EIP-2315)')
+    st.equal(c.isActivatedEIP(2537), false, 'berlin, eips: [] -> false (EIP-2537)')
+
+    st.end()
+  })
 })