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How to break up a monorepo using git subtree:

0. Set up some basic stuff:
   • These should be independent, not nested

$ NEW_REPO_PATH=
$ OLD_REPO_PATH=

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GETH_NAME=geth
GETH_IMAGE=ethereum/client-go:latest

PRYSM_NAME=prysm
PRYSM_IMAGE=gcr.io/prysmaticlabs/prysm/beacon-chain:stable

# volumes for containers
STORAGE_LOCATION=~/eth/data
GETH_STORAGE=$STORAGE_LOCATION/geth
PRYSM_STORAGE=$STORAGE_LOCATION/prysm

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0x30217b1cff7c7a11cf1b36efdb4ab787e938619f88d975b1eef0bdabd1bf72da

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What is a ScriptSig anyway?

Bitcoin legacy transactions (and Zcash transparent sends) use "ScriptSigs" to prove authorization. A ScriptSig contains the user's signature andm maybe some other information. They let the protocol check that the tx came from someone allowed to spend those Bitcoin. Most users never interact with them directly, and with the advent of SegWit, they're slowly being phased out of Bitcoin. But it's still worth knowing how they work.

Basics

prestwich

import riemann
from riemann import simple, utils
from riemann.encoding import addresses as addr


riemann.select_network('zcash_sapling_main')

# Needs a 32 byte hash, alice's pubkey, a timeout, and bob's pubkey
htlc_redeem_script = (
    'OP_IF '

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// This is an alpha contract designed to be proxied
// It is NOT production ready

contract Nonfungiblizer {

    bool initDone;
    address owner;
    address asset;
    uint256 value;

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# I do not recommend using pyethereum, as it is broken on windows
# I do not recommend web3.py as it sucks :)

# $ pip install eth_abi
# $ pip install pycryptodomex

import json
import eth_abi

from Cryptodome.Hash import keccak

prestwich

import riemann
from riemann import networks
from riemann.script import examples
from riemann.encoding import addresses

pubkey_0 = '00' * 33
pubkey_1 = '11' * 33

msig = examples.msig_two_two
msig = msig.format(pk0=pubkey_0, pk1=pubkey_1)

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from riemann.script import serialization

p2pkh_pk_script = 'OP_DUP OP_HASH160 {} OP_EQUALVERIFY OP_CHECKSIG'
script = p2pkh_script.format(pubkey_hash_hex)

stack_script = '{} {}'.format(sig_hex, pubkey_hex)
stack_script = serialization.serialize(stack_script)

prestwich

import riemann
from riemann.encoding import addresses

# Switch to Litecoin
riemann.select_network('litecoin_main')
addresses.make_p2pkh_address(pubkey_bytes)

# Switch to Bitcoin Cash
riemann.select_network('bitcoin_cash_main')
addresses.make_p2pkh_address(pubkey_bytes)