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# Send Hash
In this exercise, you will register the hash of a document on the blockchain.
### Instructions
Write a node script that provides a function `sendHash()` that:
- creates a hash `sha256` of a string provided as parameter
- connects to a local node (`http://localhost:8545`)
- sends a transaction to an address with the hash of the document in the `data` field
```js
function sendHash(text) {
//...
}
module.exports = sendHash;
```
### Notions
- [hardhat](https://hardhat.org)
- [ganache](https://www.trufflesuite.com/ganache)
- [ethers](https://docs.ethers.io/)
- [web3](https://web3js.readthedocs.io/)