feat: create smart contract helper for serverless (#232)

* feat: add log decoder helper and import web3.

* feat: create the web3 helper and install the package. update ts config to use JSONs in the helper script.

* feat: use nfaContract in submitBuildInfo handler.

* refactor: make the setTokenBuild params self-explanatory.

* docs: comment the placeholder.

serverless/package.json

@@ -28,6 +28,7 @@
     "@middy/http-json-body-parser": "^4.2.7",
     "@middy/http-response-serializer": "^4.2.8",
     "aws-sdk": "^2.1342.0",
-    "uuid": "^9.0.0"
+    "uuid": "^9.0.0",
+    "web3": "^1.9.0"
   }
 }

serverless/src/functions/builds/handler.ts

@@ -2,6 +2,7 @@ import { APIGatewayProxyResult } from 'aws-lambda';
 import { formatJSONResponse } from '@libs/api-gateway';
 
 import { v4 } from 'uuid';
+import { nfaContract } from '@libs/nfa-contract';
 
 export const submitBuildInfo = async (): Promise<APIGatewayProxyResult> => {
   try {
@@ -11,6 +12,15 @@ export const submitBuildInfo = async (): Promise<APIGatewayProxyResult> => {
       createdAt: new Date().toISOString(),
     };
 
+    // place holder call
+    nfaContract.methods
+      .setTokenBuild(1, 'hash', 'repo')
+      .call((err: string | undefined, res: any) => {
+        if (err) throw new Error(err);
+        console.log('result');
+        console.log(res);
+      });
+
     return formatJSONResponse({
       buildInfo,
     });

serverless/src/libs/log-decoder.ts

@@ -0,0 +1,8 @@
+var Web3 = require('web3');
+
+var web3 = new Web3(Web3.givenProvider || "ws://localhost:17895");
+
+export const logDecoder = (eventFieldsABI: { indexed: boolean; internalType: string; name: string; type: string; }[], data: string, topics: string[]) => {
+    return web3.eth.abi.decodeLog(eventFieldsABI, data, topics);
+};
+  

serverless/src/libs/nfa-contract.ts

@@ -0,0 +1,9 @@
+import Web3 from 'web3';
+import * as abiFile from '../../../contracts/deployments/goerli/FleekERC721.json';
+
+const contract_address = abiFile.address;
+const abi = abiFile.abi as any;
+
+const web3 = new Web3('https://rpc.goerli.mudit.blog');
+
+export const nfaContract = new web3.eth.Contract(abi, contract_address);

serverless/tsconfig.json

@@ -1,6 +1,8 @@
 {
   "extends": "../tsconfig.base.json",
   "compilerOptions": {
+    "esModuleInterop": true,
+    "resolveJsonModule": true,
     "lib": ["ESNext"],
     "moduleResolution": "node",
     "noUnusedLocals": true,