bitcoin bitcoinj bitcoin-wallet android java blockchain commits branches releases Fetching contributors C Latest commit 2877485 Jun 16, 2017 Add .md filename suffix to the 3 READMEs to prepare for Markdown conv… Permalink README.md Welcome to Bitcoin Wallet, a standalone Bitcoin payment app for your Android device!This project contains several sub-projects: wallet: The Android app itself.This is probably what you're searching for.native-scrypt: Native code implementation for Scrypt.The C files are copied from the Java Scrypt project at GitHub.market: App description and promo material for the Google Play app store.integration-android: A tiny library for integrating Bitcoin payments into your own Android app (e.g.sample-integration-android: A minimal example app to demonstrate integration of Bitcoin payments into your Android app.You can build all sub-projects at once using Gradle: gradle clean build

The Secure, Shared Bitcoin WalletSecure your bitcoin with the open source, ‑multisignature wallet from BitPay.Get CopayCopay is a true bitcoin wallet, not an account service.bitcoin vs inr trendSecure your personal funds with multiple signatures, or just one.Take security into your own hands and avoid trusting third parties with your savings.bitcoin quote bloombergLike a joint-checking account, your Copay wallet can have multiple users.litecoin future 2017To send money, the group approves each transaction.Manage shared funds with friends and coworkers.ethereum gift cardsShare a wallet with your child and introduce them to bitcoin.bitcoin explained reddit

Copay makes sharing a wallet simple and secure.No more tedious address management.The Copay app securely stores multiple, distinct bitcoin wallets, allowing both business and privacy-conscious users to keep funds carefully separated.Manage personal, business, and testnet wallets easily, all without leaving the app.ethereum krakenCopay uses hierarchical-deterministic (HD) wallets, allowing for secure in-app wallet generation and backup.Press that send button with confidence.Copay is one of the first bitcoin wallets to support the full Bitcoin Payment Protocol (BIP 0070-0073).bitcoin wallet githubWhen you send money to a Payment Protocol-enabled merchant, Copay securely verifies that your payment will go to the right place.The first bitcoin wallet to bring testnet support to both iOS and Windows Phone.Copay includes native support for the Bitcoin Testnet, perfect for testing new bitcoin applications across multiple platforms.With multisignature (P2SH) and multiple wallet support, Copay makes it simple for developers to test and demo bitcoin applications without fumbling between other mobile apps.is bitcoin robot legit

Not only is the Copay app open source, the server is too.Enterprise and power users can take full control of their finances by deploying their own version of the Copay apps and Bitcore Wallet Service.Dozens of bitcoin developers have already contributed to Copay, and we're not finished yet.sell bitcoin to netellerEvery part of Copay, wallet and server, is available to be reviewed, improved, and developed by the community.You can follow along, discuss improvements, and join in on GitHub at bitpay/copay and bitpay/bitcore-wallet-service.Get the Copay Bitcoin WalletFind it on theiOS App StoreGet it onGoogle PlayDownload fromWindows Store Get theChrome AppAvailable forMac OS XDownload forWindowsGet it forLinux Download the latest source code from GitHub ›Prices In 
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HD Wallet
 Backups
Convenient Payment Proposal FlowCopay is a secure bitcoin wallet platform for both desktop and mobile devices.

Copay uses Bitcore Wallet Service (BWS) for peer synchronization and network interfacing.Binary versions of Copay are available for download at Copay.io. – See the section How to Verify Copay Signatures for details.For a list of frequently asked questions please visit the Copay FAQ.Note: This method should only be used for development purposes.When running Copay in a normal browser environment, browser extensions and other malicious code might have access to internal data and private keys.For production use, see the latest official releases.Clone the repo and open the directory: Ensure you have Node installed, then install and start Copay: Visit localhost:8100 to view the app.A watch task is also available to rebuild components of the app as changes are made.This task can be run in a separate process – while the server started by npm start is running – to quickly test changes.It's recommended that all final testing be done on a real device – both to assess performance and to enable features that are unavailable to the emulator (e.g.

Follow the Cordova Android Platform Guide to set up your development environment.When your developement enviroment is ready, run the start:android npm package script.Follow the Cordova iOS Platform Guide to set up your development environment.When your developement enviroment is ready, run the start:ios npm package script.The desktop version of Copay currently uses NW.js, an app runtime based on Chromium.To get started, first install NW.js on your system from the NW.js website.When NW.js is installed, run the start:desktop npm package script.Before building the release version for a platform, run the clean-all command to delete any untracked files in your current working directory.(Be sure to stash any uncommited changes you've made.)This guarantees consistency across builds for the current state of this repository.The final commands build the production version of the app, and bundle it with the release version of the platform being built.On success, the Chrome extension will be located at: browser-extensions/chrome/copay-chrome-extension.

To install it go to chrome://extensions/ in your browser and ensure you have the 'developer mode' option enabled in the settings.Then click on "Load unpacked chrome extension" and choose the directory mentioned above.To enable external services, set the COPAY_EXTERNAL_SERVICES_CONFIG_LOCATION or BITPAY_EXTERNAL_SERVICES_CONFIG_LOCATION environment variable to the location of your configuration before running the apply task.Copay implements a multisig wallet using p2sh addresses.It supports multiple wallets, each with its own configuration, such as 3-of-5 (3 required signatures from 5 participant peers) or 2-of-3.To create a multisig wallet shared between multiple participants, Copay requires the extended public keys of all the wallet participants.Those public keys are then incorporated into the wallet configuration and combined to generate a payment address where funds can be sent into the wallet.Conversely, each participant manages their own private key and that private key is never transmitted anywhere.

To unlock a payment and spend the wallet's funds, a quorum of participant signatures must be collected and assembled in the transaction.The funds cannot be spent without at least the minimum number of signatures required by the wallet configuration (2-of-3, 3-of-5, 6-of-6, etc.).Once a transaction proposal is created, the proposal is distributed among the wallet participants for each to sign the transaction locally.Finally, when the transaction is signed, the last signing participant will broadcast the transaction to the Bitcoin network.Copay also implements BIP32 to generate new addresses for peers.The public key that each participant contributes to the wallet is a BIP32 extended public key.As additional public keys are needed for wallet operations (to produce new addresses to receive payments into the wallet, for example) new public keys can be derived from the participants' original extended public keys.Once again, it's important to stress that each participant keeps their own private keys locally - private keys are not shared - and are used to sign transaction proposals to make payments from the shared wallet.

For more information regarding how addresses are generated using this procedure, see: Structure for Deterministic P2SH Multisignature Wallets.Since v1.2 Copay uses BIP39 mnemonics for backing up wallets.The BIP44 standard is used for wallet address derivation.Multisig wallets use P2SH addresses, while non-multisig wallets use P2PKH./bitpay/copay/blob/master/backupRecovery.md Previous versions of Copay used files as backups.See the following section.It is possible to recover funds from a Copay Wallet without using Copay or the Wallet Service, check the Copay Recovery Tool.Copay encrypts the backup with the Stanford JS Crypto Library.To extract the private key of your wallet you can use https://bitwiseshiftleft.github.io/sjcl/demo/, copy the backup to 'ciphertext' and enter your password.The resulting JSON will have a key named: xPrivKey, that is the extended private key of your wallet.That information is enough to sign any transaction from your wallet, so be careful when handling it!

The backup also contains the key publicKeyRing that holds the extended public keys of the Copayers.Depending on the key derivationStrategy, addresses are derived using BIP44 or BIP45.Wallets created in Copay v1.2 and forward always use BIP44, all previous wallets use BIP45.Also note that since Copay version v1.2, non-multisig wallets use address types Pay-to-PublicKeyHash (P2PKH) while multisig wallets still use Pay-to-ScriptHash (P2SH) (key addressType at the backup): | Copay Version | Wallet Type | Derivation Strategy | Address Type | |---|---|---|---|---| | <1.2 | All | BIP45 | P2SH | | >=1.2 | Non-multisig | BIP44 | P2PKH | | >=1.2 | Multisig | BIP44 | P2SH | | >=1.5 | Multisig Hardware wallets | BIP44 (root m/48') | P2SH | Using a tool like Bitcore PlayGround all wallet addresses can be generated.(TIP: Use the Address section for P2PKH address type wallets and Multisig Address for P2SH address type wallets).For multisig addresses, the required number of signatures (key m on the export) is also needed to recreate the addresses.

BIP45 note: All addresses generated at BWS with BIP45 use the 'shared cosigner index' (2147483647) so Copay address indexes look like: m/45'/2147483647/0/x for main addresses and m/45'/2147483647/1/y for change addresses.Since version 1.5, Copay uses the root m/48' for hardware multisignature wallets.This was coordinated with Ledger and Trezor teams.While the derivation path format is still similar to BIP44, the root was in order to indicate that these wallets are not discoverable by scanning addresses for funds.Address generation for multisignature wallets requires the other copayers extended public keys.Copay depends on Bitcore Wallet Service (BWS) for blockchain information, networking and Copayer synchronization.Switching between BWS instances is very simple and can be done with a click from within Copay.Copay supports Ledger and Trezor hardware wallets.Hardware wallet support is only available through the Chrome App.Ledger support is only available on multisig wallets.To use Ledger, you need to have the Ledger Chrome App installed, available at: /webstore/detail/ledger-wallet/kkdpmhnladdopljabkgpacgpliggeeaf To use Trezor, you need to have the Trezor Chrome Extension installed, available at: /webstore/detail/trezor-chrome-extension/jcjjhjgimijdkoamemaghajlhegmoclj To create or join a wallet using Ledger or Trezor go to: Add Wallet -> Create or Join -> Advanced options -> Wallet Seed -> select Trezor or Ledger Both devices support multiple accounts, so you can use them for multiple wallets.

Select the account and then click on create or join.It is also possible to import a wallet from a device using: Add Wallet -> Import -> Hardware wallet Here it is also necesary to select the account number.When creating or joining a wallet, Copay will ask for two public keys for the device.One public keys is used for the wallet itself and the other is used as an entropy source to create a private / public key pair for signing requests to the Wallet Service.Every time you need to sign a transaction, the device will be needed to perform the signature.Follow the on screen instructions after clicking the send or accept buttons./bitpay/copay/blob/master/backupRecovery.md#hardware-wallets Copay uses standard gettext PO files for translations and Crowdin as the front-end tool for translators.To join our team of translators, please create an account at Crowdin and translate the Copay documentation and application text into your native language.To download and build using the latest translations from Crowdin, please use the following commands: This will download all partial and complete language translations while also cleaning out any untranslated ones.