Added constructor ABIs to abi-gen

Additionally if the constructor is not existent in JSON, meaning it's
implcite with no parameters, we're
explicitly creating one, with actual JSON parameters that it should have.

1 files changed, 9 insertions, 0 deletions

diff --git a/packages/abi-gen/src/utils.ts b/packages/abi-gen/src/utils.ts
index 764daa142..524c54a5e 100644
--- a/packages/abi-gen/src/utils.ts
+++ b/packages/abi-gen/src/utils.ts
@@ -1,6 +1,7 @@
 import * as fs from 'fs';
 import * as _ from 'lodash';
 import * as path from 'path';
+import * as Web3 from 'web3';
 
 import { ParamKind } from './types';
 
@@ -56,4 +57,12 @@ export const utils = {
             throw new Error(`Failed to read ${filename}: ${err}`);
         }
     },
+    getEmptyConstructor(): Web3.ConstructorAbi {
+        return {
+            type: 'constructor',
+            stateMutability: 'nonpayable',
+            payable: false,
+            inputs: [],
+        };
+    },
 };