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Tutorials

[Full Guide+Code]Seed Phrase & The Process of Deriving Bitcoin Addresses from It

Earlier Bitcoin Wallet used to be a bunch of private keys. In order to use new address, user had to generate new private key which made the whole process cumbersome because user had to backup each and every private key. Hierarchical Deterministic (HD) wallet made the process easier.Continue reading[Full Guide+Code]Seed Phrase & The Process of Deriving Bitcoin Addresses from It

Categories
Cryptography

Question on DER-encoding of signature pair (r, s)

I’ve been working through the byte-level details of bitcoin transactions and I need some help on DER-encoding.Continue readingQuestion on DER-encoding of signature pair (r, s)

Categories
Cryptography

How does “recid” variable work in libspec256k1 library?

I’m trying to understand how does “recid” (Recovery ID) variable work in libspec256k1 library (with C language).Continue readingHow does “recid” variable work in libspec256k1 library?

Categories
Bitcoin

Why does vout sometimes not have address?

I am trying to parse all transactions. I found that some transactions do not have addresses in their vout.Continue readingWhy does vout sometimes not have address?

Categories
Bitcoin

mnemocheck, checks that your seed phrase matches an address

I’ve always had this small doubt that those seed words I wrote down and encrypted might have a typo.Continue readingmnemocheck, checks that your seed phrase matches an address

Categories
Bitcoin

scripthash to address

It seems that electrumx stores scripthash, but I want to get all the wallet addresses.Continue readingscripthash to address

Categories
Bitcoin

I want to use RPC to get all historical transactions of an address

I want to use RPC to get all historical transactions of an address. I have synchronized the full node on my computer.Continue readingI want to use RPC to get all historical transactions of an address

Categories
Bitcoin

Can I use a bitcoind data from LAN from local bitcoin-qt?

I do not want to have bitcoin-qt started every time I boot my computer and other computers on my local LAN.Continue readingCan I use a bitcoind data from LAN from local bitcoin-qt?

Categories
Bitcoin

historical blk00000 coinbase analysis: is ~1.7 M bitcoins likely lost?

I am continuing to explore the early bitcoin blockchain using blk00000.dat covering 2009-01-03 to 2011-04-24 time period.Continue readinghistorical blk00000 coinbase analysis: is ~1.7 M bitcoins likely lost?

Categories
Bitcoin

Taproot inside coinbase transaction?

Now we are mining using “winner takes all” scheme. Every miner have to mine in pool or create the whole block alone with all transactions.Continue readingTaproot inside coinbase transaction?