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Groestlcoin Samourai Testnet v0.98.86.1 released

Started by gruve_p, June 22, 2019, 11:03:02 PM

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Groestlcoin Samourai Testnet is a wallet for the streets. A modern Groestlcoin wallet handforged to keep your transactions private, your identity masked, and your funds secure. Its main advantages are extremely portable and highly secure mobile Groestlcoin HD wallet.

We built a wallet that Groestlcoin Testnet deserves. If you are looking for a wallet that Silicon Valley will never build, the regulators will never allow, and the VC's will never invest in. This is the right wallet for you!

Changelog Groestlcoin Samourai Testnet v0.98.86.1:
• PayNym may use Segwit addresses
• Offline mode
• Address calculation tools
• PayNym address calculation tool
• Updated transaction sequence: compose-sign-broadcast
• Display wallet amounts by address type
• Full BIP84/bech32 support
• STONEWALL spend support. Break the assumptions of blockchain analysis with mathematically provable doubt between sender and recipient of your transactions. We provide increased doubt linking the inputs and outputs of a transaction. STONEWALL creates special transactions that provide strong statistical doubt as to the link between sender and recipient. Most groestlcoin wallets leave a trail of meta-data on the blockchain that surveillance firms use to deanonymize you. STONEWALL automatically helps guard against address clustering and other deanonymization attacks. Turn the tables on surveillance firms by using the same caliber tools they use.
• Ricochet 2.0 multi-hop spend. A free tool that adds extra hops of history to your transaction. Stump the blacklists and help guard against unjust 3rd party account closures. Centralized services suspend users and lock funds based on bogus blacklists and reports published by Blockchain Analytics companies. These companies scan the history of the last 4 transactions associated with the incoming addresses. Your coins can be frozen for their past activity. Even if they weren't in your control at the time. Ricochet doesn't solve the problem of blacklists but it does present a means of attacking the way spies build those blacklists. The wallet broadcasts the last transaction to the final destination with the correct amount.
• Sweep BIP84 (Bech32) & BIP49 (P2SH-P2WPKH) private keys
• Displays YPUB of BIP49 account, ZPUB of BIP84 account
• Added blockbook blockexplorer
• Batch send. Batch transactions throughout the day to save on transaction fees. Make one large batch transaction instead of multiple small transactions.
• Improved fee selection & display
• Optional setting: like-typed outputs (better privacy) vs all segwit outputs (lower fees)
• Block utxo of non-broadcast transactions
• Push any signed transaction (hex format) via 'broadcast transaction hex' in settings
• Sign messages with Segwit (P2SH-P2WPKH) privkey
• Like-typed inputs (p2pkh or segwit) will match type of outputs (wallet balance permitting)
• All utxo are now "blockable" and will not be spent if so marked
• Optionally show redeem script of Segwit utxo
• Full support for Segwit (P2SH-P2WPKH). SegWit transactions are more efficient than other legacy transaction types. With SegWit enabled by default, you pay less in miner fees when transacting with Groestlcoin Samourai Testnet Wallet and benefit from cheaper transactions.
• Balance & utxo via Chainz backend API
• New metadata format
• Improved wallet recovery UI/UX
• Custom fee lower limit now 20 gro/b
• Sign messages with any utxo privkey
• Add Upbit as street price
• Updated launch icon
• Updated Splash screen
• Optionally show privkey of utxo
• CPFP (child-pays-for-parent) for unconfirmed sent transactions
• CPFP (child-pays-for-parent) for unconfirmed received transactions
• Display static fees
• Allow custom fee on spend
• Spend via preferred trusted full node
• UTXO list
• Dynamic fee for BIP47 notif tx
• Use updated Orbot

• Open source and unlicensed.
• Refresh button - Query instant the Groestlcoin Network.
• Military Grade Encryption - Groestlcoin Samourai Testnet is encrypted on the phone using AES-256 encryption.
• Strong Default Protection with BIP 44 and BIP 39 - Groestlcoin Samourai Testnet enforces a BIP 39 passphrase on wallet creation, hardening the security of your wallet right out of the gate.
• Secure PIN Login - Use a 5-8 digit PIN to access your wallet. PIN screen is randomized on every load to thwart screen recording spyware.
• You control your private keys - Private keys are created and stored on your device and are never communicated with any server or anyone.
• Certificate Pinning - Protects HTTPS websites from impersonation using fraudulent certificates issued by compromised certificate authorities.
• No address reuse - Groestlcoin Samourai testnet never reuses addresses, never leaking valuable metadata about you and your purchase habits.
• Randomized change outputs - Groestlcoin Samourai testnet is the only wallet to randomize the number of change outputs for each send, making gathering wallet address metadata more difficult.
• Deterministic inputs/outputs positioning - Groestlcoin Samourai Testnet positions the inputs/outputs of each transaction deterministically after a send, decreasing the effectiveness of block chain snooping.
• Avoid linking previous change outputs - Groestlcoin Samourai Testnet parses all previous transactions before building a new transaction to make sure it isn't leaking valuable metadata about your and your wallet.
• Tor and VPN Support - Groestlcoin Samourai Testnet is enabled with Tor and VPN support allowing you the ability to route all transactions through an anonymous IP address.
• Send in your favorite currency - Instant currency conversion makes it easier to send Groestlcoin. Local currency exchange rates provided by Cryptopia and Bittrex.
• Export your wallet anywhere, anytime - You may export your wallet to any Groestlcoin wallet than follows BIP 39,44 specifications.
• Restore any HD wallet - You may restore an existing HD wallet from any wallet provider with or without a BIP 39 passphrase
• Choose your favorite Block Explorer - Most popular block explorers are available to view transactions on the web.
• Block Chain Privacy - Basic transaction obscuring on block chain with change address manipulation. Groestlcoin Samourai Testnet anonymization feature uses tricks with inputs and outputs of your own wallet that create transactions on the blockchain designed to confuse outsiders.
• BIP 47 "PayNyms" support - The first full BIP 47 implementation, bringing privacy to public payment addresses. Payment channels are a brand new way to privately send and receive Groestlcoin Testnet without sharing addresses or losing privacy.
• Thwart blockchain based surveillance and censorship - Circumvent financial surveillance with the most advanced privacy enhancing technologies on the market.
• Transactional Privacy - Groestlcoin Samourai Testnet has formulated multiple algorithms that help preserve your transactional privacy.
• Advanced Sending - Groestlcoin Samourai Testnet gives you fine grained control over privacy and miners fees with every send.
• Remote SMS Commands - The first Groestlcoin testnet wallet to hide itself and offer a remote self destruct button.
• Stealth Mode - Operate silently on the device.

When you share a normal address publicly, you are giving surveillance firms a starting point to track you. PayNyms defend against this type of 'First Touch' attack by never revealing an address to anyone other than the sender and recipient of the transaction.
Unlike ordinary groestlcoin testnet addresses you cannot search for a PayNym on the blockchain, so you can't see the balance or transactions associated with a PayNym. Feel free to share your PayNym with your friends and family, or even post it to your social media profile, no one can see your balance.
Connect to your friends, family, and anyone else. Once connected there will no longer be a need to request a groestlcoin testnet address, the PayNym is all you need.
Unlike ordinary groestlcoin testnet addresses a PayNym can be re-used multiple times without worrying about privacy damaging address reuse.

How to use PayNyms
Scan a PayNym code to open a PayNym channel - A PayNym channel will be created between both wallets by sending a special transaction on the blockchain. This is called a broadcast transaction and requires 1 network confirmation to confirm.
Tap to send - Once the broadcast transaction is confirmed the PayNym channel is open. Simply tap the channel name to send Groestlcoin testnet directly to that wallet. No need to know their address.
Your wallet now has a PayNym that you can share - Your PayNym code is unique to the wallet and never changes. You can publish and share your PayNym without a loss of privacy for you or the sender.
No address needed - When your Paynym code is added by another wallet you will be able to receive Groestlcoin testnet without ever sharing a Groestlcoin testnet address. You can optionally send Groestlcoin testnet back to the other wallet without sharing addresses.

Stealth Mode & Remote Commands
To remotely retrieve your wallet seed for backup/restore. Send an SMS to your phone with the following message: SW seed YOUR_PIN_CODE
You will receive the HEX seed of your wallet in response which you can use to restore access to your Groestlcoin.
To remotely wipe your wallet send an SMS to your phone with the following message: SW wipe YOUR_PIN_CODE
You will receive confirmation that the wallet has been securely wiped from the device.
If your phone is stolen and the thief has switched the SIM Card you can still initiate remote commands. With Sim Switch Defence enabled Groestlcoin Samourai Testnet will send your registered trusted number an SMS as soon as the SIM card is changed on your stolen phone. You can now send a remote wipe command to the new number.
While in Stealth Mode Groestlcoin Samourai Testnet will not appear on your phone home screen, app list, launcher, or recent apps. To open your wallet once it is in Stealth Mode you must dial a special code: **YOUR_PIN_CODE#
If the code has been entered correctly Groestlcoin Samourai Testnet will launch.

It is appreciated if feedback of the following is provided:
1. Can you receive coins? (small amounts to avoid losing them)
2. Can you send coins?
3. Can you scan a QR code from another phone.
4. Can you request coins via email or other android service?
5. How long does it take to query the blockchain?
6. Does it calculate exchange rates properly?
7. Does the Refresh button work?
8. Can you use the wallet through VPN?
9. Can you use the wallet through TOR?
10. Is the stealth mode working properly?
11. Is the remote self destruct working properly?
12. Can you receive coins over a payment channel? (small amounts to avoid losing them)
13. can you send coins over a payment channel?
14. Is Ricochet send working properly?
15. Is the Batch Spend working properly?
16. Are you able to chose from multiple blockexplorers?
17. Are you able to export and import your wallet?
18. Is the scramble pin option working?

This application is unlicensed. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.

Important note:
The Google version is the same as on the Google Play store and it will not support some Stealth and Remote functions. The Full version supports all functions.  If you install the Google version, you can still manually install the full version and your wallet will not be lost.

Known Issue:
If sending multiple payments right after one another, make sure you see the last sent payment before sending another.  If you don't see it press the refresh button.

The application may have unfound bugs and problems. To leave feedback: 
1.  PM hashengineering on bitcointalk:;u=155038
2.  Email: [email protected]
3.  Reports of errors can also be posted in this topic.

Groestlcoin Samourai Testnet is available in the Google play store without the Stealth and Remote functions:

Groestlcoin Samourai Testnet full version is available here:

Source code: - The Groestlcoin Samourai Testnet Source code