BlockChain API to read Public note | Bitcointalksearch.org

upal

full member

Activity: 165

Merit: 102

Quote from: kjj on December 26, 2013, 09:20:45 AM

Quote from: upal on December 26, 2013, 04:30:48 AM

Quote from: Sukrim on December 25, 2013, 07:01:02 PM

You are wrong, this is just a proprietory service by blockchain. info. Messages are not part of the bitcoin protocol.

Thanks for correcting me. Is there any way we may mark a transaction with a text in Bitcoin protocol so that the receiver can identify the sender if there are multiple claimants to be sender ?

Bitcoin is different. You should not attempt to recreate obsolete systems in bitcoin.

Bitcoin has no sender. You should not use this concept in your system. If you need to identify someone, do it up front, before providing the payment address. Then your problem is merely watching the address and checking the amount received.

exactly that is what I am going to implement

kjj

legendary

Activity: 1302

Merit: 1026

Quote from: upal on December 26, 2013, 04:30:48 AM

Quote from: Sukrim on December 25, 2013, 07:01:02 PM

You are wrong, this is just a proprietory service by blockchain. info. Messages are not part of the bitcoin protocol.

Thanks for correcting me. Is there any way we may mark a transaction with a text in Bitcoin protocol so that the receiver can identify the sender if there are multiple claimants to be sender ?

Bitcoin is different. You should not attempt to recreate obsolete systems in bitcoin.

Bitcoin has no sender. You should not use this concept in your system. If you need to identify someone, do it up front, before providing the payment address. Then your problem is merely watching the address and checking the amount received.

upal

full member

Activity: 165

Merit: 102

Thank u all. Can u plz help me out here => https://bitcointalksearch.org/topic/no-of-confirmation-through-api-385733

Envrin

sr. member

Activity: 318

Merit: 251

Starting with Bitcoind v0.9, which will hopefully be released shortly, you'll be allowed to include up to 80 bytes of data in a transaction, which gets stored in the blockchain.

Parazyd

hero member

Activity: 812

Merit: 587

Space Lord

You cannot sign messages in a transaction. You can sign messages as such (no correlation(?) to the blockchain).
So only the person that owns the address' private key can sign the message with that said address.

What you need to do is implement a system that will allow you to check if the signed message is valid.

upal

full member

Activity: 165

Merit: 102

Quote from: Parazyd on December 26, 2013, 04:51:05 AM

https://en.bitcoin.it/wiki/Protocol_specification

You'll find everything there. You can't send messages the way you want. But you can sign messages.

Thank u so much for the reference. I read the following 2...

i. https://en.bitcoin.it/wiki/Protocol_specification#Signatures
ii. https://en.bitcoin.it/wiki/Protocol_specification#tx

But could not identify a way to read any (signed) message from a tx. I think I am missing something. How do I identify sender of a transaction through API ? I mean, how a user of my system will prove that he/she is the one who made the transaction ?

Parazyd

hero member

Activity: 812

Merit: 587

Space Lord

https://en.bitcoin.it/wiki/Protocol_specification

You'll find everything there. You can't send messages the way you want. But you can sign messages.

upal

full member

Activity: 165

Merit: 102

ok ...is the addr_tag part of the bitcoin protocol ?

Parazyd

hero member

Activity: 812

Merit: 587

Space Lord

Nope. If everyone would put messages into the blockchain, it would make it even bigger.

upal

full member

Activity: 165

Merit: 102

Quote from: Sukrim on December 25, 2013, 07:01:02 PM

You are wrong, this is just a proprietory service by blockchain. info. Messages are not part of the bitcoin protocol.

Thanks for correcting me. Is there any way we may mark a transaction with a text in Bitcoin protocol so that the receiver can identify the sender if there are multiple claimants to be sender ?

Sukrim

legendary

Activity: 2618

Merit: 1007

You are wrong, this is just a proprietory service by blockchain. info. Messages are not part of the bitcoin protocol.

upal

full member

Activity: 165

Merit: 102

I am trying to read the Public note in a transaction, e.g.

https://blockchain.info/tx/114f37f3e30c7d9b5d5339e9a1652f2f065d0413fe34ee1121de0f21a50aaed3

Do u know the API for the same ?

p.s. I guess Public Note is a generic facility for transaction from any wallet, web or local machine. Please correct me if I am wrong.

Topic: BlockChain API to read Public note (Read 1119 times)