BlockNap Listener Server

Version 0.1.0

1.Create account in https://infura.io/

2.Create wallet in https://www.myetherwallet.com/

3.Get ether in http://faucet.ropsten.be:3001/

4.Clone repository.

5.Install nodeJS libraries. Execute "npm install" in folder.

6.Edit configuration file

• ADDRESS_WALLET = Address of wallet create
• PRIVATE_KEY_WALLET = Private key of wallet
• PRIVATE_KEY_INFURA = Private key of infura

	{
	  "account": "ADDRESS_WALLET",
	  "port": 8889,
	  "private": "PRIVATE_KEY_WALLET",
	  "listenFiles": [
		{
		  "name": "logTest",
		  "file": "logTest.js"
		}
	  ],
	  "provider_config": "PRIVATE_KEY_INFURA",
	  "provider":"infura_ropsten",
	  "wss":"wss://ropsten.infura.io/ws",
	  "gas": "0x1e8480",
	  "gasPrice": "0x15",
	  "path_listen": "../../listen",
	  "db": "postgresql://root@localhost:26257/blocknap?sslmode=disable"
	}

7.Init server: node index.js

Prerequisites

1. Install CockroachDB v2.0.6

https://www.cockroachlabs.com/docs/releases/v2.0.6.html

2. Create data base blocknap

3. Execute script create_table_listen_address.sql

Call Oracle Server

• URL http://ip_server:port/oracle/v1/add/name_listener/address

• Header: Content-Type:application/json

• Body (ABI of Smart Contract):

{
   "abi":"......"
}

Add new listener

1. In folder listen copy logTest.js with other name

2. Modify data method with the logic of listener

on("data", function(log){
        console.log("> data log "+JSON.stringify(log));
    })

3. Add listener to properties in section listenFiles

	{
		  "name": "<nameToCallFromManager>",
		  "file": "<nameNewFileJSOfListener>"
		}

4. Restart server