devrandom

Keybase proof

I hereby claim:

• I am devrandom on github.
• I am devrandom01 (https://keybase.io/devrandom01) on keybase.
• I have a public key ASCQSwCXaAL2xXIXJcFbaj26u-2fqN5hsevXVs7ozuT1NQo

To claim this, I am signing this object:

devrandom

pragma solidity ^0.4.22;

contract SimpleMultiSig {

  uint public nonce;                 // (only) mutable state
  uint public threshold;             // immutable state
  mapping (address => bool) isOwner; // immutable state
  address[] public ownersArr;        // immutable state

  // Note that owners_ must be strictly increasing, in order to prevent duplicates

devrandom

pragma solidity ^0.4.22;

contract SimpleMultiSig {

  uint public nonce;                 // (only) mutable state
  uint public threshold;             // immutable state
  mapping (address => bool) isOwner; // immutable state
  address[] public ownersArr;        // immutable state

  // Note that owners_ must be strictly increasing, in order to prevent duplicates

devrandom

import org.junit.Before
import org.junit.Test
import kotlin.test.fail
import org.bitcoinj.core.Transaction
import org.bitcoinj.params.MainNetParams
import org.bitcoinj.core.NetworkParameters
import org.bitcoinj.core.ECKey
import org.bitcoinj.core.Address
import org.bitcoinj.testing.FakeTxBuilder
import org.bitcoinj.core.Coin

devrandom

Verifying that +devrandom is my openname (Bitcoin username). https://onename.com/devrandom

devrandom

public class HDUtil {
    private static final byte[] xprv = new byte[]{0x04, (byte) 0x88, (byte) 0xAD, (byte) 0xE4};
    private static final byte[] xpub = new byte[]{0x04, (byte) 0x88, (byte) 0xB2, (byte) 0x1E};
    private static final byte[] tprv = new byte[]{0x04, (byte) 0x35, (byte) 0x83, (byte) 0x94};
    private static final byte[] tpub = new byte[]{0x04, (byte) 0x35, (byte) 0x87, (byte) 0xCF};

    public static DeterministicKey parseDeterministicKey(String serialized) throws AddressFormatException {
        byte[] data = Base58.decodeChecked(serialized);

        if (data.length != 78) {

devrandom

#include <iostream>
#include <vector>

int main ()
{
  std::vector<int> first;
  std::vector<int> second;

  first.assign (7,100);             // 7 ints with a value of 100

devrandom

class MultiSigUtils {
    public static void signInput(Transaction tx, int inputIndex, byte[] inputScript, ECKey key) throws AddressFormatException {
        TransactionInput input = tx.getInput(inputIndex);
        Script existingScriptSig = input.getScriptSig();

        int numSigs = Script.decodeFromOpN(inputScript[0]);
        ScriptBuilder builder = new ScriptBuilder();
        Script redeemScript = new Script(inputScript);

        List<ScriptChunk> redeemChunks = redeemScript.getChunks();

devrandom

#create a 64 bit m1.large instance using ami-08f40561
ssh -i key ubuntu@...
sudo apt-get update
sudo apt-get install python-vm-builder qemu-kvm apt-cacher git-core ruby

# turn it on
sudo vi /etc/default/apt-cacher
sudo service apt-cacher start

sudo chown ubuntu /mnt

devrandom

This is obsolete, since Bitcoin Core has moved to a more modern build system.