Merge pull request #106 from rsksmart/feat/upgradeable-erc20-erc1967

Feat/upgradeable erc20 erc1967

Author: Sergio

dist/services/classes/Contract.js

@@ -35,6 +35,19 @@ class Contract extends _BcThing.BcThing {
           if (!deployedCode) throw new Error(`Missing deployed code for contract: ${this.address}`);
           let info = await this.parser.getContractInfo(deployedCode, contract);
           let { interfaces, methods } = info;
+
+          if (!interfaces.length) {// if no interfaces... double check
+            const proxyCheckResult = await this.parser.getEIP1967Info(this.address);
+            // if proxy detected, the implementation contract interfaces are used
+            if (proxyCheckResult && proxyCheckResult.interfaces.length) {
+              interfaces = proxyCheckResult.interfaces;
+            }
+
+            if (proxyCheckResult && proxyCheckResult.methods.length) {
+              methods = proxyCheckResult.methods;
+            }
+          };
+
           if (interfaces.length) this.setData({ contractInterfaces: interfaces });
           if (methods) this.setData({ contractMethods: methods });
         }