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+++
title = "Blocks"
description = "Block Documentation"
weight = 10
+++
A block that was proposed to commit Transactions in `transaction_list` to the
ledger with a nonce that made `hash` valid; 6 zeroes at the left hand side of the
hash (24 bytes).
We are _mining_ using [blake2s](https://www.blake2.net/) algorithm, which produces 256 bit hashes. Hash/second is roughly 20x10^3 on my machine, a new block can be mined in around 4-6 minutes.
# Requests
## GET
A HTTP `GET` request to [/block](/block) endpoint will return the latest mined block.
## POST
A HTTP `POST` request with Authorization using JWT will allow you to propose your own blocks.
# Fields
```
transaction_list: [array of Fingerprints]
nonce: unsigned 32-bit integer
timestamp: ISO 8601 <date>T<time>
hash: String
```
# Hash
```tha``` field in [jwt documentation](/jwt) in fact stands for "The Hash", in the case of a post request for a block, you need to use hash field of the block.
[ISO 8601 Reference](https://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations)
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