It uses Websocket API of blockchain.info by subscribing to the "Unconfirmed transactions" ({"op":"unconfirmed_sub"}).

When a message is received it parses the JSON.

Gets the hash of utx (txHash) Creates links for each inputs/outputs: input.prev_out_addr --> txHash txHash --> output.addr

{ from: i1, to: txHash, t: 'i', value: 0.01 }
...
{ from: iN, to: txHash, t: 'i', value: 0.13 }


{ from: txHash, to: o1, t: 'o', value: 0.021 }
...
{ from: txHash, to: oN, t: 'o', value: 0.69 }

Then for each link it creates a node and link that node to the transaction.

The socket.io does not work as Haskell's socket.io is not compatible /w the Node.js one. It connects to the API in every 20 secs and check's whether the txs are updated, means check tha saved last tx is not same with the received last one.

Then it processes every txs. Gets the hash of tx (ctsId) Creates links for each inputs/outputs: ctsInputs[i][0] -> ctsId ctsId --> ctsOutputs[i][0]

{ from: i1, to: ctsId, t: 'i', value: 0.01 }
...
{ from: iN, to: ctsId, t: 'i', value: 0.13 }


{ from: ctsId, to: o1, t: 'o', value: 0.021 }
...
{ from: ctsId, to: oN, t: 'o', value: 0.69 }

Then for each link it creates a node and link that node to the transaction.

$ npm install connect serve-static node-rest-client

$ node server.js

Server running on 8081...

Open browser

bash -x ./build.sh

• npm install
• npm run build