Ethereum 2.0 ‘Dress Rehearsal’ Gets a Do-Over With Zinken ...

Bitcoin

Discussion about Bitcoin. BitcoinSV restores the original Bitcoin protocol, will keep it stable, and allow it to massively scale on-chain. BSV will maintain the vision laid out by Satoshi Nakamoto in the 2008 white paper - Bitcoin: A Peer-to-Peer Electronic Cash System.
[link]

Particl

🛍️ Particl Marketplace -the leave no trace marketplace! 100% user-owned, untraceable. NoCensorship. FreeMarkets. NoSalesFees. ___________________________________________ It's a multi-vendor marketplace like Amazon but protects you. Have a storefront with your own access rules. ___________________________________________ Particl Coin (PART) is an independent digital privacy currency and settlement-layer for transactions made on the Marketplace.
[link]

Drop Zone - A Decentralized Marketplace Built on Bitcoin

An anonymous decentralized local marketplace built on Bitcoin.
[link]

Windows / Linux Guide to using Trezor with Bitcoin Core (HWI)

This is a guide to using your Trezor with Bitcoin Core. It may seem like more trouble than it's worth but many applications use Bitcoin Core as a wallet such as LND, EPS, and JoinMarket. Learning how to integrate your Trezor into a Bitcoin Core install is rather useful in many unexpected ways. I did this all through the QT interfaces, but it's simple to script. There is a much simpler guide available from the HWI github, and the smallest Linux TLDR is here
Unfortunately, I don't have access to a Coldcard or Ledger. I'm not sure how the setpin or -stdinpass parameters are handled on that HW.

( A ) Install TrezorCTL, HWI, and build GUI

You only need to set the wallet up once, but may repeat to upgrade

( A.I ) Download extract and install HWI

  1. Download and isntall Python
  2. Download https://github.com/bitcoin-core/HWI/archive/1.1.2.zip
  3. Extract it to a working folder (assumes C:\User\Reddit\src\HWI)
  4. Change Directory (cd) to working folder cd "C:\User\Reddit\src\HWI"
  5. Setup venv python -m venv .venv
  6. Enter venv .venv\Scripts\activate.bat 1
  7. Install dependencies python -m pip install -U setuptools pip wheel
  8. Install TrezorCTL python -m pip install trezor[hidapi]
  9. Install HWI python -m pip install hwi pyside2
  10. Download github.com/libusb/libusb/releases/download/v1.0.23/libusb-1.0.23.7z
  11. Extract MS64\dll\libusb-1.0.dll from the archive
  12. Copy to pywin copy libusb-1.0.dll .venv\Lib\site-packages\pywin32_system32\

( A.II ) Build the QT UI files

  1. Download and install MSYS2
  2. Launch a mingw64.exe shell
  3. CD to working folder cd "C:\User\Reddit\src\HWI"
  4. Enter venv source .venv/Scripts/activate 1
  5. Run UI build bash contrib/generate-ui.sh

( B ) Create a Trezor wallet in Bitcoin Core (testnet)

You only need to set the wallet up once, no private key data is stored, only xpub data

( B.I ) Retrieve keypool from HWI-QT

  1. Launch hwi-qt.exe --testnet (assuming testnet)
  2. Click Set passphrase (if needed) to cache your passphrase then click Refresh
  3. Select you trezor from the list then click Set Pin (if needed)
  4. Ensure your Trezor in the dropdown has a fingerprint
  5. Select Change keypool options and choose P2WPKH
  6. Copy all the text from the Keypool textbox

( B.II ) Create the wallet in Bitcoin QT

  1. Launch Bitcoin Core (testnet) (non-pruned) 2
  2. Select Console from the Window menu
  3. Create a wallet createwallet "hwi" true
  4. Ensure that hwi is selected in the console wallet dropdown
  5. Verify walletname using the getwalletinfo command
  6. Import keypool importmulti '' (note ' caging)
  7. Rescan if TXNs are missing rescanblockchain 3

( C.I ) Grab Tesnet coins

  1. Select the Receive tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Select Create new receiving address and copy address
  4. Google "bitcoin testnet faucet" and visit a few sites
  5. Answer captcha and input your addressed copied from C.I.3

( D ) Spending funds with HWI

This is how you can spend funds in your Trezor using Bitcoin Core (testnet)

( D.I ) Create an unsigned PSBT

  1. Select the Send tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Verify your balance in Watch-only balance
  4. Rescan if balance is wrong (see B.II.7) 3
  5. Craft your TXN as usual, then click Create Unsigned
  6. Copy the PSBT to your clipboard when prompted

( D.II ) Sign your PSBT

  1. In HWI-QT click Sign PSBT
  2. Paste what you copied in D.I.6 in PSBT to Sign field
  3. Click Sign PSBT
  4. Copy the text for PSBT Result

( D.III ) Broadcast your TXN

  1. Select the Console window in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Finalize PSBT: finalizepsbt
  4. Copy the signed TXN hex from the hex field returned
  5. Broadcast TXN: sendrawtransaction

Final Thoughts

I did this all through the GUI interfaces for the benefit of the Windows users. Windows console is fine, but the quote escaping in windows console is nightmarish. Powershell would be good, but that throws this on a whole another level for most Windows folks.
There is also the need to use HWI-QT due to a bug in blank passphrases on the commandline. You can work around it by toggling passphrase off or on, but again, it's more than I wanted to spell out.
Footnotes:
  • 1. - Later version of python put the activate script under 'bin' instead of 'Script'
  • 2. - You can run pruned, but you need to have a fresh wallet
  • 3. - Rescan is automatic on 'importmulti' but I was pruned so it was wierd
submitted by brianddk to Bitcoin [link] [comments]

Hey someone has something on Bitcoin Testnet? Precise to test a project all Faucet are done.

Hey someone has something on Bitcoin Testnet? Precise to test a project all Faucet are done.
Bitcoin Testnet:2N9nGY1nuGjf3KLih5jwNYKq5ac2YucESQq
submitted by wick0x to Bitcoin [link] [comments]

Windows Guide to using Trezor with Bitcoin Core (HWI)

This is a guide to using your Trezor with Bitcoin Core. It may seem like more trouble than it's worth but many applications use Bitcoin Core as a wallet such as LND, EPS, and JoinMarket. Learning how to integrate your Trezor into a Bitcoin Core install is rather useful in many unexpected ways. I did this all through the QT interfaces, but it's simple to script. There is a much simpler guide available from the HWI github, and the smallest TLDR is here

( A ) Install TrezorCTL, HWI, and build GUI

You only need to set the wallet up once, but may repeat to upgrade

( A.I ) Download extract and install HWI

  1. Download and isntall Python
  2. Download https://github.com/bitcoin-core/HWI/archive/1.1.2.zip
  3. Extract it to a working folder (assumes C:\User\Reddit\src\HWI)
  4. Change Directory (cd) to working folder cd "C:\User\Reddit\src\HWI"
  5. Setup venv python -m venv .venv
  6. Enter venv .venv\Scripts\activate.bat 1
  7. Install dependencies python -m pip install -U setuptools pip wheel
  8. Install TrezorCTL python -m pip install trezor[hidapi]
  9. Install HWI python -m pip install hwi pyside2
  10. Download github.com/libusb/libusb/releases/download/v1.0.23/libusb-1.0.23.7z
  11. Extract MS64\dll\libusb-1.0.dll from the archive
  12. Copy to pywin copy libusb-1.0.dll .venv\Lib\site-packages\pywin32_system32\

( A.II ) Build the QT UI files

  1. Download and install MSYS2
  2. Launch a mingw64.exe
  3. CD to working folder cd "C:\User\Reddit\src\HWI"
  4. Enter venv source .venv/Scripts/activate 1
  5. Run UI build bash contrib/generate-ui.sh

( B ) Create a Trezor wallet in Bitcoin Core (testnet)

You only need to set the wallet up once, no private key data is stored, only xpub data

( B.I ) Retrieve keypool from HWI-QT

  1. Launch hwi-qt.exe --testnet (assuming testnet)
  2. Click Set passphrase (if needed) to cache your passphrase then click Refresh
  3. Select you trezor from the list then click Set Pin (if needed)
  4. Ensure your Trezor in the dropdown has a fingerprint
  5. Select Change keypool options and choose P2WPKH
  6. Copy all the text from the Keypool textbox

( B.II ) Create the wallet in Bitcoin QT

  1. Launch Bitcoin Core (testnet) (non-pruned) 2
  2. Select Console from the Window menu
  3. Create a wallet createwallet "hwi" true
  4. Ensure that hwi is selected in the console wallet dropdown
  5. Verify walletname using the getwalletinfo command
  6. Import keypool importmulti '' (note ' caging)
  7. Rescan if TXNs are missing rescanblockchain 3

( C.I ) Grab Tesnet coins

  1. Select the Receive tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Select Create new receiving address and copy address
  4. Google "bitcoin testnet faucet" and visit a few sites
  5. Answer captcha and input your addressed copied from C.I.3

( D ) Spending funds with HWI

This is how you can spend funds in your Trezor using Bitcoin Core (testnet)

( D.I ) Create an unsigned PSBT

  1. Select the Send tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Verify your balance in Watch-only balance
  4. Rescan if balance is wrong (see B.II.7) 3
  5. Craft your TXN as usual, then click Create Unsigned
  6. Copy the PSBT to your clipboard when prompted

( D.II ) Sign your PSBT

  1. In HWI-QT click Sign PSBT
  2. Paste what you copied in D.I.6 in PSBT to Sign field
  3. Click Sign PSBT
  4. Copy the text for PSBT Result

( D.III ) Broadcast your TXN

  1. Select the Console window in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Finalize PSBT: finalizepsbt
  4. Copy the signed TXN hex from the hex field returned
  5. Broadcast TXN: sendrawtransaction

Final Thoughts

I did this all through the GUI interfaces for the benefit of the Windows users. Windows console is fine, but the quote escaping in windows console is nightmarish. Powershell would be good, but that throws this on a whole another level for most Windows folks.
There is also the need to use HWI-QT due to a bug in blank passphrases on the commandline. You can work around it by toggling passphrase off or on, but again, it's more than I wanted to spell out.
Footnotes:
  • 1. - Later version of python put the activate script under 'bin' instead of 'Script'
  • 2. - You can run pruned, but you need to have a fresh wallet
  • 3. - Rescan is automatic on 'importmulti' but I was pruned so it was wierd
submitted by brianddk to TREZOR [link] [comments]

I am looking for alot of testnet coins to do research on the network, can anyone please help?

I think I posted here a few months ago asking for coins and got sent a bunch! Unfortunately I have used up all those coins during my research and am now looking for more coins.
I am looking for about 100 tBTC to be used for academic purposes in research.
My current research goals are to perform live attacks on the bitcoin testnet and on the bitcoin testnet lightning network. This will involve opening lightning channels both on sender and receiver side. On the receiver side I will be fully funding the channel myself, which means I will loose the coins as I give them to the other node so I can make a remote-funded channel.
If anyone can help me I will be very greatful. Here is my address in my lightning wallet tb1qx3sdsvyw5vzv3vdd3ntn2du35a9vz2k4pwjm26
Thanks
edit: if you want to confirm my academic identity I am more than happy to do so. Just send me a PM with your email and I will send you an email from my academic address.
edit2: closed.Thank you!
submitted by harryninetythree to Bitcoin [link] [comments]

Do you need Testnet coins? Do you have Testnet coins that you aren't using? Please read.

We're seeing a lot of requests for Bitcoin Testnet token donations. Apparently they're hard to come by because many testnet faucets are broken.
If you are a developer in need of tokens for testing your software, post your testnet address in the comments below. People might also be curious what kind of project you're working on! No guarantees, but maybe some people reading this will be willing to distribute testnet coins they're not using. If you receive a transaction, please edit your comment.
Please note that you may not actually need any testnet coins at all, as Regtest Mode may be sufficient for your needs. Regtest allows you to generate new blocks and mint as many tokens as you need for testing. It's basically a self-hosted testnet.
If you are not a developer, don't bother: Testnet coins are completely worthless.

Read about testnet and regtest here.

submitted by BashCo to Bitcoin [link] [comments]

$MTXLT — The Fuel For Private DeFi

Call courtesy of facemeltersmicros on telegram
T.me/facemeltersmicros
Circ Supply: 47,844 Total Supply : 900,000
Price $47 Market Cap $2.2m
https://coinmarketcap.com/currencies/tixl/
Buy on probit exchange (liquidity is here) & Binance Dex
MTXLT (later TXL) is the native token of the Private DeFi Platform called Autobahn Network. It can be transferred through the network with zero-fees, reflecting the best features of today's cash.
What is Private DeFi?
Privacy should be fundamental in financial transactions. However, many existing DeFi platforms, such as Ethereum for example, fail to fulfil this criterion – either partly or completely. The Autobahn Network is one of the first of its kind to truly support private DeFi.
What is DeFi about the Autobahn Network?
The Autobahn Network will initially focus on the areas of asset tokenisation and providing a second-layer platform for existing assets on other chains. This will provide the foundation for offering further DeFi use cases in the future. The current focus is on the launch of Alphanet, which will be the first production release of the Autobahn Network.
The Autobahn Network is a decentralized next-generation, second-layer solution for digital assets. It provides the ability to use any cryptocurrency, including Bitcoin, as an efficient & effective means of world payment.
The Autobahn Network employs the most sophisticated technologies to have emerged from the blockchain world over recent years to build a decentralized network, tailored for payments. Bitcoin, and other digital assets, can be sent to the Autobahn Network. Once they are in the network they can then be transferred quickly, privately and with low transaction fees.
HOW DOES IT WORK?
• Send BTC to the Autobahn Network Gateway • The decentralized nodes hold your BTC via a Threshold Signature Scheme (TSS) • Transfer BTC within the network as often as you like • Withdraw BTC to the main blockchain, if you plan to hold it there • The decentralized nodes release your BTC via TSS
To fully appreciate high-speed, you have to experience it yourself. They have developed a fully working Testnet especially for this purpose:
https://autobahn.network/testnet
The Autobahn Network is developed by the non-profit company - Tixl gGmbH, based in Hamburg (Germany). Tixl raised seed capital of USD $1,250,000 in early 2019 by selling the Tixl Token (MTXLT) to retail investors.
Tech behind the Autobahn
https://medium.com/tixlcurrency/the-technology-behind-the-autobahn-network-81fdecf41c20
Most of the time the bottleneck is the consensus. Tixl use their own implementation of the Stellar Consensus Protocol (SCP). Since SCP is known to establish consensus within a few seconds, even if there are some more conflicting transactions, nodes will still be able to reach consensus quickly. It’s also known that SCP can deal with high transaction volumes. Although there is no verified statement from the Stellar foundation, there are rumors that SCP can handle 10,000 transactions per second in certain network constellations
Project milestones and key links
In the future:
Find more details on these events in the medium article released today
https://link.medium.com/qXfp3zjM57
WHY TIXL?
A number of different concepts for improving Bitcoin and the transfer of digital assets in general have been developed, with the ultimate goal of achieving fast and cheap transactions, or to provide privacy. The Tixl Token on the Autobahn Network provides a perfect combination of them all.
REVENUE STREAMS
Transaction Fees
Transactions in the Autobahn Network will be cheap but not completely free. Fees will be paid using in the currency of the asset being transfered. The revenue will then be used to purchase MTXLT on the open market. As a result, fees are indirectly paid in MTXLT.
Listing Fees
As soon as the Autobahn Network gains adoption, it will become a sought-after platform for other assets. A (monthly) listing fee, to be paid in MTXLT, will also serve to increase the public demand for MTXLT.
Additional Services
Besides the obvious sources of revenue, other features - like the purchase of nicknames - can also be used to generate revenue.
Social media buzz
Ivan on Tech about Tixl in "TOP ALTCOINS 2020 - Programmer explains"
https://youtu.be/ynyvwZetb8s
Something different?
Tixl global reserve has been developed to provide extra confidence to investors. Read more here:
https://medium.com/tixlcurrency/tixl-global-reserve-tgr-update-c59bee09c66d
Other questions
Do I need TXL to send and receive BTC and other third-party assets?
To ensure the greatest usability, they decided against using TXL directly as "fuel" because it would provide an obstacle to use if you had to buy TXL before you are able to transfer BTC, or other digital assets. The same issue has attracted criticism from users of other networks that support different assets. As a solution, they settled on the idea of allowing transaction fees for certain assets (for example, BTC) to be paid in their native currency. One can send BTC through the Autobahn Network without having to purchase TXL and pay much lower fees than you would on the Bitcoin blockchain itself.
How is Autobahn Network secured by Bitcoin?
To increase the decentralization of Autobahn Network, a hash representing the current state of the Autobahn Network ledger will be written onto the Bitcoin blockchain regularly. In doing so, the Autobahn Network will increase its trust level by leveraging the most secure and immutable blockchain in the world.
submitted by therealfacemelter to CryptoMoonShots [link] [comments]

Question about LND

I compiled LND from source on Ubuntu 18 and have a full (non-pruned) indexed bitcoind node on the same machine. The setup instructions say to use
lnd --bitcoin.active --bitcoin.testnet --debuglevel=debug --bitcoin.node=bitcoind --bitcoind.rpcuser=xxxx --bitcoind.rpcpass=xxxx --bitcoind.zmqpubrawblock=tcp://127.0.0.1:28332 --bitcoind.zmqpubrawtx=tcp://127.0.0.1:28333 --externalip=xxxx 
However, I didn't use --bitcoin.testnet. I used --bitcoin.mainnet instead. Is that ok? Are there any drawbacks to this? I can confirm that the wallet was created in ~/.lnd/data/chain/bitcoin/mainnet/ Also, my bitcoin.conf file has testnet=0. I haven't done anything else yet.
submitted by 1Tim1_15 to lightningnetwork [link] [comments]

How to I solo mine on testnet with a S17 miner?

I have a full node configured to run on the bitcoin testnet network. I also have access to a S17 miner.
How can I mine some testnet coins using my testnet full node and the S17 miner?
submitted by dmp1ce to BitcoinMining [link] [comments]

Bitcoin blockchain messages

A Brief History of Hidden Messages in the Bitcoin Blockchain
Embit Wallet - Bitcoin testnet wallet and messages
submitted by codecellar to Bitcoin [link] [comments]

We should learn from the mistakes of Litecoin: LTC is marketing itself with two use cases: 1) The silver of something something, 2) Testnet for BTC. That's not enough to be a top 10 coin anymore. Luckily, Bitcoin Cash is more than that!

We should learn from the mistakes of Litecoin: LTC is marketing itself with two use cases: 1) The silver of something something, 2) Testnet for BTC. That's not enough to be a top 10 coin anymore. Luckily, Bitcoin Cash is more than that! submitted by Egon_1 to btc [link] [comments]

Good example of why you need to wait for one (or many) confirmations

Here's an example of a Bitcoin (testnet) TXN that will never confirm. Other than the fact that the fee looks low, for the most part it looks valid. You'd have to do a bit of digging to realize that its parent is invalid making all children TXNs (including this one) the equivalent of a voided check.
The TXNs were exceedingly simple to create, required no programming experience and almost no technical expertise.
submitted by brianddk to Bitcoin [link] [comments]

นักพัฒนา Ethereum 2.0 จะเปิดการทดสอบ testnet "Zinken" เพิ่มเติมในอีกไม่กี่วันข้างหน้า - Bitcoin Addict

นักพัฒนา Ethereum 2.0 จะเปิดการทดสอบ testnet submitted by thaibitcoin to u/thaibitcoin [link] [comments]

Ethereum 2.0 ประกาศ Testnet ใหม่ชื่อ "Spadina" - Bitcoin Addict

Ethereum 2.0 ประกาศ Testnet ใหม่ชื่อ submitted by thaibitcoin to u/thaibitcoin [link] [comments]

Docker-compose bitcoind looses 8% of progress on a restart.

Howdy folks,
So I'm prototyping a new lightning centric social media concept. For dev work I'm leveraging docker-compose to handle the stack infrastructure, but whenever I kill or restart the bitcoin (testnet) node it looses 8% of progress and has to resync.
It's not a huge pain/will go away in the production environment, but I thought I'd ask if anybody has seen similar / knows how to get bitcoind to (more) gracefully exit.
submitted by DJBunnies to Bitcoin [link] [comments]

ANALISE BITCOIN & ETHEREUM - ETH 2.0 FASE 0 EM NOVEMBRO - SPADINA TESTNET - #DeFi - 16/09/2020 - Dicas sobre Bitcoin - Ganhe rápido

submitted by infocryptocoins to CertificadoDigital [link] [comments]

Bitcoin testnet faucet ? I’m writing about payment service and will be needing at least a few hundred or couple thousand tbtc ! anyone know where i get bitcoin testnet ? Help !

Bitcoin testnet!
submitted by bazzue to Bitcoin [link] [comments]

[How-To] Crafting an offline TXN with the trezorlib python API

With the rollout of the new 0.12.0 Trezor API, I thought it might be time to update some of my old offline_txn scripts. The following is about 80 lines of python that will craft and sign a VERY simple transaction on Testnet.
The new rollout also comes with some new tools. The build_tx.py that is useful in conjunction with the trezorctl sign_tx command.
Both of the methods below will produce a signed TXN that can then be imported into Electrum using the "Tools -> Load transaction -> From text" command.
Note: u/Crypto-Guide has a good walkthrough for installing trezorlib in Windows if you haven't already done that.

Example of using trezorctl btc sign-tx

This example uses the build_tx.py script to build JSON to feed to the sign-tx command. You will need to download the build_tx.py file from github. It is not automatically installed with the trezor package.
```

python build_tx.py | trezorctl btc sign-tx -

Coin name [Bitcoin]: Testnet Blockbook server [btc1.trezor.io]: tbtc1.trezor.io
Previous output to spend (txid:vout) []: e294c4c172c3d87991...060fad1ed31d12ff00:0 BIP-32 path to derive the key: m/84'/1'/0'/0/0 Input amount: 129999866 Sequence Number to use (RBF opt-in enabled by default) [4294967293]: Input type (address, segwit, p2shsegwit) [segwit]:
Previous output to spend (txid:vout) []:
Output address (for non-change output) []: 2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3 Amount to spend (satoshis): 129999706
Output address (for non-change output) []: BIP-32 path (for change output) []: Transaction version [2]: Transaction locktime [0]: Please confirm action on your Trezor device.
Signed Transaction: 0200000000010100ff121dd31ead0f06...f279b642d85c48798685f86200000000 ```

Example of using crafting a TXN using trezorlib directly

If your good with python, or want to see how everything works under the hood, here's 80 lines of python to generate a similar signed transaction.
```python

!/usbin/env python3

[repo] https://github.com/brianddk/reddit ... python/offline_txn.py

[req] pip3 install trezor

from trezorlib import btc, messages as proto, tools, ui from trezorlib import MINIMUM_FIRMWARE_VERSION as min_version from trezorlib.client import TrezorClient from trezorlib.transport import get_transport from trezorlib.btc import from_json from json import loads from decimal import Decimal from sys import exit

Tested with SLIP-0014 allallall seed (slip-0014.md)

User Provided Fields; These are pulled from test scripts

CHANGE THESE!!!

coin = "Testnet"

Get legacy UTXO prev_txn hex from blockbook server. For example:

https://tbtc1.trezor.io/api/tx-specific/ \

e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00

in1_prev_txn_s = '{"txid":' \ '"e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00"}'
in1_prev_index = 0 in1_addr_path = "m/84'/1'/0'/0/0" # allallall seed in1_amount = 129999867 out1_address = "2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3" out1_amount = in1_amount - 192

Defaults

tx_version = 2 tx_locktime = 0 sequence = 4294967293

Code

in1_prev_txn_j = loads(in1_prev_txn_s, parse_float=Decimal) in1_prev_hash = in1_prev_txn_j['txid'] in1_prev_hash_b = bytes.fromhex(in1_prev_hash) device = get_transport() client = TrezorClient(transport=device, ui=ui.ClickUI())
fw_version = (client.features.major_version, client.features.minor_version, client.features.patch_version) if fw_version < min_version[client.features.model]: print("Please flash to the latest FW") exit(1)
signtx = proto.SignTx( version = tx_version, lock_time = tx_locktime )
ins = [proto.TxInputType( address_n=tools.parse_path(in1_addr_path), prev_hash=in1_prev_hash_b, prev_index=in1_prev_index, amount=in1_amount, script_type=proto.InputScriptType.SPENDWITNESS, sequence=sequence )] outs = [proto.TxOutputType( address=out1_address, amount=out1_amount, script_type=proto.OutputScriptType.PAYTOADDRESS )]
txes = None for i in ins: if i.script_type == proto.InputScriptType.SPENDADDRESS: tx = from_json(in1_prev_txn_j) txes = {in1_prev_hash_b: tx} break
_, serialized_tx = btc.sign_tx(client, coin, ins, outs, details=signtx, prev_txes=txes) client.close() print(f'{{"hex": "{serialized_tx.hex()}"}}') ```
From here, you simple take the resultant TXN hex and import it into Electrum using the "Tools -> Load transaction -> From text" clickpath
submitted by brianddk to Bitcoin [link] [comments]

Why I'm Not Working With Crypto.com | Is It Too Late To Buy Bitcoin? | ETH 2.0 Final Testnet Launch

Why I'm Not Working With Crypto.com | Is It Too Late To Buy Bitcoin? | ETH 2.0 Final Testnet Launch submitted by DarkestChaos to CryptoCurrency [link] [comments]

[How-To] Crafting an offline TXN with the trezorlib python API

With the rollout of the new 0.12.0 API, I thought it might be time to update some of my old offline_txn scripts. The following is about 80 lines of python that will craft and sign a VERY simple transaction on Testnet.
The new rollout also comes with some new tools. The build_tx.py that is useful in conjunction with the trezorctl sign_tx command.
Both of the methods below will produce a signed TXN that can then be imported into Electrum using the "Tools -> Load transaction -> From text" command.
Note: u/Crypto-Guide has a good walkthrough for installing trezorlib in Windows if you haven't already done that.

Example of using trezorctl btc sign-tx

This example uses the build_tx.py script to build JSON to feed to the sign-tx command. You will need to download the build_tx.py file from github. It is not automatically installed with the trezor package.
```

python build_tx.py | trezorctl btc sign-tx -

Coin name [Bitcoin]: Testnet Blockbook server [btc1.trezor.io]: tbtc1.trezor.io
Previous output to spend (txid:vout) []: e294c4c172c3d87991...060fad1ed31d12ff00:0 BIP-32 path to derive the key: m/84'/1'/0'/0/0 Input amount: 129999866 Sequence Number to use (RBF opt-in enabled by default) [4294967293]: Input type (address, segwit, p2shsegwit) [segwit]:
Previous output to spend (txid:vout) []:
Output address (for non-change output) []: 2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3 Amount to spend (satoshis): 129999706
Output address (for non-change output) []: BIP-32 path (for change output) []: Transaction version [2]: Transaction locktime [0]: Please confirm action on your Trezor device.
Signed Transaction: 0200000000010100ff121dd31ead0f06...f279b642d85c48798685f86200000000 ```

Example of using crafting a TXN using trezorlib directly

If your good with python, or want to see how everything works under the hood, here's 80 lines of python to generate a similar signed transaction.
```python

!/usbin/env python3

[repo] https://github.com/brianddk/reddit ... python/offline_txn.py

[req] pip3 install trezor

from trezorlib import btc, messages as proto, tools, ui from trezorlib import MINIMUM_FIRMWARE_VERSION as min_version from trezorlib.client import TrezorClient from trezorlib.transport import get_transport from trezorlib.btc import from_json from json import loads from decimal import Decimal from sys import exit

Tested with SLIP-0014 allallall seed (slip-0014.md)

User Provided Fields; These are pulled from test scripts

CHANGE THESE!!!

coin = "Testnet"

Get legacy UTXO prev_txn hex from blockbook server. For example:

https://tbtc1.trezor.io/api/tx-specific/ \

e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00

in1_prev_txn_s = '{"txid":' \ '"e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00"}'
in1_prev_index = 0 in1_addr_path = "m/84'/1'/0'/0/0" # allallall seed in1_amount = 129999867 out1_address = "2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3" out1_amount = in1_amount - 192

Defaults

tx_version = 2 tx_locktime = 0 sequence = 4294967293

Code

in1_prev_txn_j = loads(in1_prev_txn_s, parse_float=Decimal) in1_prev_hash = in1_prev_txn_j['txid'] in1_prev_hash_b = bytes.fromhex(in1_prev_hash) device = get_transport() client = TrezorClient(transport=device, ui=ui.ClickUI())
fw_version = (client.features.major_version, client.features.minor_version, client.features.patch_version) if fw_version < min_version[client.features.model]: print("Please flash to the latest FW") exit(1)
signtx = proto.SignTx( version = tx_version, lock_time = tx_locktime )
ins = [proto.TxInputType( address_n=tools.parse_path(in1_addr_path), prev_hash=in1_prev_hash_b, prev_index=in1_prev_index, amount=in1_amount, script_type=proto.InputScriptType.SPENDWITNESS, sequence=sequence )] outs = [proto.TxOutputType( address=out1_address, amount=out1_amount, script_type=proto.OutputScriptType.PAYTOADDRESS )]
txes = None for i in ins: if i.script_type == proto.InputScriptType.SPENDADDRESS: tx = from_json(in1_prev_txn_j) txes = {in1_prev_hash_b: tx} break
_, serialized_tx = btc.sign_tx(client, coin, ins, outs, details=signtx, prev_txes=txes) client.close() print(f'{{"hex": "{serialized_tx.hex()}"}}') ```
From here, you simple take the resultant TXN hex and import it into Electrum using the "Tools -> Load transaction -> From text" clickpath
submitted by brianddk to TREZOR [link] [comments]

K's BitLotto - Beta Testers Wanted

Some time back I decided to write a draw-game style bitcoin lottery. That project is finally ready for beta testing.
The game is currently running on the Bitcoin Testnet in order to allow for more wild play and in case there was an issue with the book-keeping (though those seem to be all worked out).
I am looking for people willing to test the game with me and provide feedback. Just create an account and fund yourself either from your own testnet wallet or from a testnet faucet. Deposits require 1 confirmation to hit.
With your feedback, I can put this game up on the main net and we can all have a good time.

About K's BitLotto

http://test.ksbitlotto.com
If most instant gratification bitcoin games are the equivalent of Lottery Scratch-offs, then K's BitLotto is the big draw game.
There is a new game every 50 blocks. This works out to be roughly 3 games per day.
To play, you purchase one or more tickets with a random hash for a given game. If the last hexdigits of your ticket match the last hexdigits of the hash for the game's block, you win. Match at least two hexdigits to their proper position within the difficulty, and you win a lesser prize, the more you match, the greater the prize.
As more tickets are purchased for a game, the difficulty for winning the jackpot increases, and the more matching hexdigits are needed to win the Jackpot.
The difficulty for each game is clearly posted, as well as the progress towards the next difficulty. Minimum difficulty is 4 hexdigits.
If no ticket wins the Jackpot, the pot rolls over to the next game, and continues to roll over until there is a winner.
Tickets are 5 satoshi each, so players are encouraged to purchase several.
submitted by kenzal to BitcoinGambling [link] [comments]

ANALISE BITCOIN & ETHEREUM - NOVIDADES UNIBRIGHT - ETH 2.0 TESTNET MADALLA LANÇOU HOJE - 04/08/2020 - Dicas sobre Bitcoin - mais rápido dinheiro

ANALISE BITCOIN & ETHEREUM - NOVIDADES UNIBRIGHT - ETH 2.0 TESTNET MADALLA LANÇOU HOJE - 04/08/2020 - Dicas sobre Bitcoin - mais rápido dinheiro submitted by infocryptocoins to CertificadoDigital [link] [comments]

Why I'm Not Working With Crypto.com | Is It Too Late To Buy Bitcoin? | ETH 2.0 Final Testnet Launch (x-post from /r/cryptocurrency)

Why I'm Not Working With Crypto.com | Is It Too Late To Buy Bitcoin? | ETH 2.0 Final Testnet Launch (x-post from /cryptocurrency) submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Bitcoin May Explode, BTC On Every Block, Whatsapp Cash Ban ... Cardano Haskell Testnet Update, Bitcoin Halving, and Phase 2 of Cardano Ambassador Program Create A Wallet (Testnet V0.2) Cardano Shelley Testnet Launching; DASH InstantSend 2 seconds; Litecoin's Founder on Proof of Stake Blockchain tutorial 25: Testnet and faucets

Ethereum 2.0 ‘Dress Rehearsal’ Gets a Second Shot With Zinken Testnet Oct 1, 2020 at 14:49 UTC Updated Oct 1, 2020 at 14:50 UTC (BlueJay/ iStock/Getty Images Plus) Largest Testnet for Ethereum 2.0 Starts Attracting Stakers. Ethereum (ETH) has not moved as fast from mining to staking as previously promised. Instead, the network has taken a series of smaller steps. The testnet is an alternative Bitcoin block chain, to be used for testing.Testnet coins are separate and distinct from actual bitcoins, and are never supposed to have any value. This allows application developers or bitcoin testers to experiment, without having to use real bitcoins or worrying about breaking the main bitcoin chain. The ethereum 2.0 testnet has pretty much reached its goal of around 524,000 eth deposited to the smart contract. It is now good to go on August the 4th 2020 at around 1 to 2 PM London time when the genesis block of the ethereum 2.0 testnet goes live this Tuesday. Ethereum 2.0 developer will launch the network final public testnet on August 4, reaffirming the possibility of a 2020 launch of ETH 2.0.

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Bitcoin May Explode, BTC On Every Block, Whatsapp Cash Ban ...

NEW CHANNEL: https://www.youtube.com/channel/UCH9HlTrjyLmLRS0iE1P4rrg ----- Rich Dad Poor Dad: https://amzn.to/3cKJ4Ia C... ETHEREUM STAKING - Validator Client Inactivity Penalty on the Topaz Testnet (How much did I lose?) - Duration: 4:13. Kierin Mulholland - DeFi & Crypto Videos 510 views Pi Network project will officially start the Phase 2 (Testnet) from the Pi Day. ... Pi Network is trying to pull off what Bitcoin did back in 2008. Fore more information about pi network check out: willkommen zur Bitcoin-Informant Show Nr. 941. Heute sprechen wir über folgende Themen: Ethereum 2.0 Testnet wächst rapide, BaFin schließt Bitcoin-Automaten in ganz Deutschland & Indien will ... In this video we discuss updates with the Cardano Haskell Testnet node. We also talk about the Bitcoin halving and my perspectives on where we can anticipate price in the coming weeks.

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