Alt Coins for Bitcoin

What are the android apps to track cryptocoin market? I know a lightweight app to keep track of cryptocurrency market. It's based on coinmarketcap site info. It's very simple and fast. If you have some another nice option too post below. https://play.google.com/store/apps/details?id=br.com.razecapps.cryptovalue https://ift.tt/2FH5Lkq

ScriptSig Conversion in Python I'm trying to convert a scriptsig into bytes so that I can better extract R & S values, but when I try and convert, I'm missing some of elements that should be there, like x30 for example. scriptsig = '473044022015d8e1ba1d7fa0bd065f3da2d91d71d12890ff4d9a655161783504714c8b06a3022007d71d93d79039d73fc47ab9787128b7a6d7449e72688f0cf6dc175cfa90755d0121037ab79af7f21e54e03297fc9447952bfacedc57dcebd802eb19ba75636ad1fd5e' import binascii bytes1 = binascii.unhexlify(scriptsig) #doesn't work bytes2 = scriptsig.decode('base64') #doesn't work The output: bytes1 'G0D\x02 \x15\xd8\xe1\xba\x1d\x7f\xa0\xbd\x06_=\xa2\xd9\x1dq\xd1(\x90\xffM\x9aeQax5\x04qL\x8b\x06\xa3\x02 \x07\xd7\x1d\x93\xd7\x909\xd7?\xc4z\xb9xq(\xb7\xa6\xd7D\x9erh\x8f\x0c\xf6\xdc\x17\\\xfa\x90u]\x01!\x03z\xb7\x9a\xf7\xf2\x1eT\xe02\x97\xfc\x94G\x95+\xfa\xce\xdcW\xdc\xeb\xd8\x02\xeb\x19\xbaucj\xd1\xfd^' bytes2 '\xe3\xbd\xf4\xe3\x8d6\xdbMyw\xc7\xb5m\xad]\xed...

Private key only wallet for Bitcoin Core regtest I'm running a private regtest network on GCP. I generated a list of 2000 vanity testnet addresses ordered sequentially from prefixes mooo1 to n2ooo with their respective pub/priv key pairs, and to prevent complications, I want to only have one private key for each node (change in outgoing transactions are sent to the original address). Because there's no security concern in my setting (it's just a performance test, no money or attacker is involved), I want to make each bitcoind instance only use a single private key for all transactions, and not generate new addresses through an HD wallet. This is because viewing transactions is much more streamlined. I can tell which node is sending bitcoins to which other node, and diagnose issues more easily. Is there an option in bitcoind to only use a single private key? https://ift.tt/2TGdbHD

Why Spectre has a "weak" liveness? According to this article: ( https://medium.com/@avivzohar/the-spectre-protocol-7dbbebb707b5 ) written by one of Spectre's author (Aviv Zohar), it is mentioned that Spectre has weak liveness . What is the reason of mentioning "weak" for liveness ? And according to this, can we define a "strong liveness" ? https://ift.tt/2PSuNBv

lightning-cli list only my channels After connecting to a busy lighnting node such as 03c856d2dbec7454c48f311031f06bb99e3ca1ab15a9b9b35de14e139aa663b463@testnet-lnd.htlc.me the number of channels my own lightning node knows about becomes very large. Is there a way to get the lightning-cli listchannels command to apply a filter and list only the channels my node is directly participating in? https://ift.tt/2zqqeEj

Exact definition of "Liveness" and "Safety" properties in a consensus? Two main properties of a consensus are " Liveness " and " Safety ". What are the exact and precised definition of " Liveness " and " Safety " properties in a consensus ? Are the following definitions correct? Safety: Achieving an agreement on a single state by all participants ? Liveness: Possibility of updating this state with keeping the agreement ? https://ift.tt/2DFfDZj

Using ZeroMQ of bitcoind to monitor addresses? I'm developing a system which should monitor incoming transactions for the local addresses (addresses in this node's wallet). It would be great to use high-performance ZeroMQ for this. Is it possible? I know I can receive notifications about new transactions from it. But notification only contains transaction ID. How do I know if it's related to one of the local addresses? Do I need to make RPC call for each transaction to find it's output address? This seems extremely ineffective, cause there a lot of new transactions and by making so many RPC calls I will just flood the server. Is there a better option? https://ift.tt/2FHMz5Y