It might have been answered before but I have a question about the "Relayed by IP" field.
I understand whatever ip address it shows has no meaning, but if it says "Relayed by IP : Blockchain.info", does it mean 100% sure that the transaction has been performed though blockchain.info's online wallet feature ?
Probably not. It could also have been performed through their API. There are websites (and probably wallets) that broadcast transactions by sending them through blockchain.info's API, I am 90% sure they also show up as relayed by blockchain.info.
Thanks.
I had a quick glance at their transaction API (
https://blockchain.info/api/json_rpc_api) and it seems like you do need a wallet with them to broadcast transactions, even if only for authentication purposes ?
Or is there another API where someone can post raw signed transactions without authenticating first ?