Source code of the bitcoin wallet application breadwallet, bit breadwallet

Source code of the bitcoin wallet application breadwallet, bit breadwallet

Breadwallet is a secure, reliable, and convenient bitcoin wallet that protects users from malware and common security issues in other applications and fully utilizes the security features provided by iOS, including AES hardware encryption, app sandbox and data protection, code signature, and keychain service. Breadwallet uses a simplified payment verification or SPV mode to retrieve data directly from the bitcoin network.

Project details: http://ios.662p.com/thread-2150-1-1.html

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How to view the bitcoin wallet private key?

Wallet encryption is used to automatically encrypt and store the wallet with the private key. The Bitcoin official client supports wallet encryption from version 0.4.0. The encrypted wallet prompts you to enter the password each time you make the payment. If the password is incorrect, the client rejects the payment. If you use the wallet (wallet. dat) that was backed up as early as possible, you can still trade normally. Considering the principles of bitcoin, we can also conclude that as long as a private key (wallet) exists, you can prove that you are the legal owner of the wallet, no matter whether the wallet (the core is the private key corresponding to an address) is encrypted or deleted, it cannot be rejected. When backing up the bitcoin wallet, pay attention to the existence of the bitcoin payment zero mechanism (for example, sending 50 btc of a complete 100 btc to an address, the system will send 50 btc to the address of the other party and return 50 btc to a new address on your client. This address will not be directly displayed in your address list ), every time 100 bitcoin messages are sent to another address or 100 different addresses are used to receive bitcoin messages, please back up your wallet again, otherwise, the Bitcoins returned and received by subsequent transactions will be lost permanently. In addition to wallet encryption, users can also generate their own offline paper wallet and brain wallet. Paper wallet: you only need to enter "dumpprivkey your Bitcoin address" on the console in the debugging window of the bitcoin official client before you encrypt your wallet (do not enclose it with quotation marks when entering it) to view your own private key, and then print out the private key and store it somewhere. Then, delete the wallet file on your computer to isolate the network of your wallet. A brain wallet uses a javascript script to customize a phrase that can be remembered permanently (it must be special and unique. It is recommended that the phrase be at least 16 characters long and can be used in both Chinese and English ), generate a pair of public and private keys, and then the user transfers all Bitcoin to this Bitcoin address (that is, the Public Key, in the future, you only need to remember this phrase to restore your wealth anywhere at any time (unless your phrase is unfortunately known and transferred by others ). To ensure absolute security, the Armory client separates the wallet from the client, and the wallet in the offline client is strictly encrypted and protected. If the online client needs to pay for bitcoin, it must be signed by a computer that has mastered the offline wallet, and then broadcast through the online client.

What resources does bitcoin wallet occupy on computers? Disk C is full, but the file cannot be found

Currently, the data capacity of bitcoin blockchain continues to grow by about 10 Gb, and many friends have not set the C disk to be too large when installing the system, are you worried that the C drive will blow up one day. Now let me learn how to migrate data. (Disable the Bitcoin client first)

1. Find the data folder of bitcoin;

XP---C: \ Documents and Settings \ username \ Application Data \ Bitcoin

Vista, win7 --- C: \ Users \ username \ AppData \ Roaming \ Bitcoin
(Note: AppData is hidden. Set to show hidden files .)

2. Cut the Bitcoin folder to another drive with a large space, such as an edisk;

3. Edit the Bitcoin shortcut on the desktop, copy the following line to the "target" column, and save it:

"C: \ Program Files \ Bitcoin \ bitcoin-qt.exe"-datadir = e: \ Bitcoin

Now, double-click the Bitcoin shortcut on the desktop, and the client starts, and your drive C is saved and the space is successfully released.