https://github.com/makevoid/op-return.js
OP Return example using JS, bitcore-lib and blockchain.info - Timestamp a digital signature or fingerprint an OP_RETURN transaction on the bitcoin blockchain - status: WIP
https://github.com/makevoid/op-return.js
Last synced: 10 months ago
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OP Return example using JS, bitcore-lib and blockchain.info - Timestamp a digital signature or fingerprint an OP_RETURN transaction on the bitcoin blockchain - status: WIP
- Host: GitHub
- URL: https://github.com/makevoid/op-return.js
- Owner: makevoid
- Created: 2019-05-01T09:15:27.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2023-01-03T21:05:26.000Z (about 3 years ago)
- Last Synced: 2025-03-23T18:37:43.871Z (10 months ago)
- Language: JavaScript
- Homepage:
- Size: 838 KB
- Stars: 5
- Watchers: 2
- Forks: 2
- Open Issues: 18
-
Metadata Files:
- Readme: Readme.md
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README
# Op Return JS
#### Status: WIP
### OP Return example - Timestamp any hash, proof, JSON, digital signature, file fingerprint, PostgresSQL DB dump hash or your PoA Blockchain tip with an OP_RETURN on the bitcoin blockchain
At the moment it's the implementation is just REPL based, take a look at `op-return-repl.js`.
### Install
npm install
### Running this
node op-return-repl.js
### Explanation
The implementation is basically an OP_RETURN transaction with Bitcore-Lib:
```js
const message = "0x1234567" // your Database or PoA Blockchain hash
const { utxos, pushTx } = require('blockchain-api-basic')
let utxoSet = await utxos(address)
const tx = new Transaction()
.from(utxoSet)
.addData(message)
// ...
.sign(pvtKey)
await pushtx(tx.serialize())
```
And essentially with a dozen of lines of bitcore-lib JS you can secure your PoA blockchain or to "blockchainify" your app.
There is no need to write complex smart contracts or find the most popular or the most obscure blockchain to achieve immutable timestamping. With this and with backups made by every party involved in the system you should beat in development time all the other options available.
Enjoy
@makevoid
---
See some [notes about Bitcoin](https://github.com/makevoid/op-return.js/blob/master/Readme.notes.md)