Hi,

I'm looking to build a full list of known Meta Protocols on top of Bitcoin that utilise OP_RETURN with a prefix.

Name	link	OP_RETURN Hex Prefix
Open Asset	https://github.com/OpenAssets/open-assets-protocol/blob/master/address-format.mediawiki	4f4101
Eternity Wall	http://eternitywall.it/	455720
Factom	http://factom.org/	4661
CoinSpark	http://coinspark.org/developers/metadata-format/	53504b
Proof of Existence	https://www.proofofexistence.com/	444f4350524f4f46
University of Nicosia	http://digitalcurrency.unic.ac.cy/certificates	554e6963444320
Colu	http://colu.co/	434301
Ascribe	https://www.ascribe.io/	41534 ??
Blockchain ID	https://github.com/blockstack/blockstore	6964??

The plan will be to add these into smartbit's op_return filtered list. i.e. :
https://www.smartbit.com.au/op-returns
https://www.smartbit.com.au/op-returns/proof-of-existence

Appreciate any feedback, additions, or corrections on the list above!

Cheers

Thanks for the feedback on the design/UI!

Just added a heap of Charts to the site. Appreciate if you guys have any feedback on them as well, or chart/feature request.

https://bitcointalk.org/index.php?topic=1213435.0


Cheers,
Jarred

https://www.smartbit.com.au/charts

Latest update for Smartbit; Charts!

We've added 21 new Bitcoin Charts
You can overlay any additional chart as well.
Between Bitcoin Blocks - the average time between blocks being solved.
Block Reward Per Day - the average reward for blocks being solved each day.
Block Reward Per Bitcoin Block - the reward miners receive for each block they solve.
Average Bitcoin Block Size - the average size of blocks being solved each day.
Total Size Of All Bitcoin Blocks - the accumulative size of all blocks that have been solved.
Blocks Solved Per Day - the number of blocks being solved each day.
Total Number Of Bitcoin Blocks - the total number of blocks over time.
Total Bitcoins In Circulation - the total amount of bitcoins in circulation over time.
Bitcoin Mining Difficulty - the difficulty of solving a block.
Bitcoin Network Hash Rate - the hash rate of the Bitcoin Network.
Bitcoin Miner Revenue Per Day - the revenue that miners have received in a day.
Bitcoin Miner Revenue Per Block - the revenue a miner makes per block solved.
Bitcoins Sent Per Day - the number of bitcoins sent each day.
Bitcoins Sent Per Block - the average number of bitcoins being sent in a block each day.
Bitcoin Transaction Fees Per Day - the amount of transaction fees sent each day.
Bitcoin Transaction Fees Per Block - the average amount of transaction fees paid per block.
Bitcoin Transaction Fees Per Transaction - the average amount of transaction fees paid per block.
Bitcoin Transactions Per Day - the number of transactions sent each day.
Bitcoin Transactions Per Block - the average number of transactions sent per block each day.
Bitcoin Transactions Per Second - the average number of transactions sent per second for each day.
Total Bitcoin Transactions - the total number of transactions sent over time.


Blog post with some more detail: https://blog.smartbit.com.au/bitcoin-charts/
Testnet: https://sandbox.smartbit.com.au/charts


Any feedback or request always welcome!

Just to add on to Charles comment Smartbit has the following features as well

1. Get tx data: given a tx hash, return its hex data (also for unconfirmed txs).

Couple options. For example here's how to to get the hex, based on the transaction hash :
https://www.smartbit.com.au/tx/bf3c9cf049c360fcd9e6af9e730478e0de5563167e283bfb29e8b012ae53b747/hex
https://api.smartbit.com.au/v1/blockchain/transaction/e0d4d2f1ec598fe237dced2132ed8e978da9f4708884b87a41e898b74a835fc1/hex

You can also decode the hex and get the response directly from bitcoin core which is quite cool!
https://www.smartbit.com.au/txs/decodetx

Or you can use the API to decode via POST (See API Playground)
https://api.smartbit.com.au/v1/blockchain/decodetx


2. Push tx: given a tx (as hex data), push or broadcast it to the network.

Just paste the hex in here:
https://www.smartbit.com.au/txs/pushtx
Or API as  POST method
https://api.smartbit.com.au/v1/blockchain/pushtx


If the hex is already in the blockchain, the api will respond with the relevant transaction id.

3. Get tx propagation: given an unconfirmed tx hash, returns an estimate % of nodes that have this tx in their mempool.

Smartbit has transaction propagation % across the network. You can see this live on any unconfirmed transaction.

Find a unconfirmed transaction here and go to its detail page. You'll see the propagtion percentage as its picked up across the network.
https://www.smartbit.com.au/txs/unconfirmed
https://api.smartbit.com.au/v1/blockchain/transaction/e0d4d2f1ec598fe237dced2132ed8e978da9f4708884b87a41e898b74a835fc1

The propagation field on the API is (along with double_spend).
"propagation": "1.0000",
"double_spend": false,

If more than one transaction tries to re spend an unspent transaction output, we'll flag the transaction as a double spend.


We've also built an API Playground. The playground allows anyone to interact with the API, changing any variables, and seeing the response via the interface. Perfect for testing and understanding how the Data API and websockets calls work.

API Playground here:

https://www.smartbit.com.au/docs


Would appreciate knowing if anyone uses the API Playground and feedback you may have?