-
- https://coinmap.org/view.
- Went through bitcoin-cli quite a bit.
- https://bitcoinfees.net/ avg btc transaction fee right now $0.28.
- Fully synced the bitcoin testnet chain on my desktop as well. This one only took about an hour.
- Created and explored a few different wallets and addresses, interacted with a few faucets, explored on blockcypher.
- APIs for raw transactions, UTXOs and signing.
- Played with multisignature. Creating a multisig wallet directly in Electrum, as well as from scratch (bitcoin-cli createmultisig).
- Sent solana around. Played with fees, intentional errors, doublespends, unfunded recipients.
- Electrum is python: https://github.com/spesmilo/electrum.
- Remember MD5 = message digest and produces 128.
- OP_RETURN for arbitrary data.
