I think this would be a great use case for Bither. Keep your cold storage encrypted on a paper wallet and when you want to spend it, import it into a cold Bither wallet. Easy to make backups and the keys never touch the internet.

I didn't understand how to monitor cold HD account. I don't understand which QR I need to scan from the cold wallet to the hot. What is the process? Thanks.

今天从coinbase转了一笔比特币到bither钱包后，钱包就打不开了。 错误信息如下： 03-05 13:38:45.686 14275-14303/? E/UEHandler: java.lang.ExceptionInInitializerError at net.bither.bitherj.core.b.a(AddressManager.java:69) at net.bither.BitherApplication$1.run(BitherApplication.java:187) at java.lang.Thread.run(Thread.java:761) Caused by: java.lang.NullPointerException: Attempt to get length of null array at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:106) at net.bither.bitherj.e.a.a(Script.java:186) at net.bither.bitherj.e.a.<init>(Script.java:107) at net.bither.bitherj.core.Out.f(Out.java:160) at net.bither.bitherj.core.a.A(Address.java:172) at net.bither.bitherj.core.a.d(Address.java:141) at net.bither.bitherj.core.a.<init>(Address.java:86) at net.bither.bitherj.a.a.a.c(AbstractAddressProvider.java:968) at net.bither.bitherj.a.a.a.b(AbstractAddressProvider.java:42) at net.bither.bitherj.a.a.a$17.a(AbstractAddressProvider.java:709) at net.bither.bitherj.a.a.a$17.a(AbstractAddressProvider.java:703) at net.bither.d.a.b.b(AndroidDb.java:71) at net.bither.bitherj.a.a.f.b(AbstractProvider.java:38) at net.bither.bitherj.a.a.a.e(AbstractAddressProvider.java:703) at net.bither.bitherj.core.b.z(AddressManager.java:119) at net.bither.bitherj.core.b.<init>(AddressManager.java:57) at net.bither.bitherj.core.b.<clinit>(AddressManager.java:43) at net.bither.bitherj.core.b.a(AddressManager.java:69)  at net.bither.BitherApplication$1.run(BitherApplication.java:187)  at java.lang.Thread.run(Thread.java:761) 

另外，看了下这笔转账的transaction，发现输入和输出中有些比特币地址是bc1开头的，烦请帮助解决。

I'll use some pseudocode to explain.

There's an outer function which produces b random bytes by XORing two arrays of b bytes from two wrapper functions (one wrapper which eventually gets bytes from /dev/urandom, and one from your custom entropy mixer):

function get_random_bytes(b):
    return wrapper1_get_bytes_from_dev_urandom(b) ^ wrapper2_get_bytes_from_custom_mixer(b)

This would look fine to me if at least one of those wrapper functions generated uniform output e.g. if they looked like this:

function wrapper1_get_bytes_from_dev_urandom(b):
    return get_bytes_from_dev_urandom(b)

function wrapper2_get_bytes_from_custom_mixer(b):
    return get_bytes_from_custom_mixer(b)

But they don't look like the above, instead they both look something like this:

function wrapper1_get_bytes_from_dev_urandom(b):
    do
        bytes = get_bytes_from_dev_urandom(b)
    loop while bytes are all 0's
    return bytes

function wrapper2_get_bytes_from_custom_mixer(b):
    do
        bytes = get_bytes_from_custom_mixer(b)
    loop while bytes are all 0's
    return bytes

Neither ever returns all 0's, and therefore the get_random_bytes() will slightly favor returning all 0's[1]. If you only use this get_random_bytes() with b=32 to create private keys and k's for signatures, this is a non-issue presuming that you'd discard an all 0's result anyways. However if you use get_random_bytes() for other purposes, or if keys are produced by calling get_random_bytes(1) 32 times, it might be an issue (especially when b is small). I couldn't say how much of an issue; I'm no cryptographer....

[1] Specifically get_random_bytes(b) will produce an all 0's output about (2^8b - 1) / (2^8b - 2) times more frequently than any other particular result, which for b=1 is a perhaps noticeable 0.4% greater number of 0's produced.

Installed the app yesterday, was working well at that point.

Restarting it today, it stops right after displaying the splashscreen, sometime several time in a row.

I used adb to look at the log, and the error is the following (usually multiple times in a row).

I/MultiDex( 9066): VM has multidex support, MultiDex support library is disabled.
E/Vold    (  321): Failed to find mounted volume for /storage/sdcard1/Android/data/net.bither/cache/
W/Vold    (  321): Returning OperationFailed - no handler for errno 0
W/ContextImpl( 9066): Failed to ensure directory: /storage/sdcard1/Android/data/net.bither/cache
E/Vold    (  321): Failed to find mounted volume for /storage/sdcard1/Android/data/net.bither/cache/
W/Vold    (  321): Returning OperationFailed - no handler for errno 0
W/ContextImpl( 9066): Failed to ensure directory: /storage/sdcard1/Android/data/net.bither/cache
E/UEHandler( 9066): java.lang.ExceptionInInitializerError
E/UEHandler( 9066): 	at net.bither.BitherApplication$1.run(BitherApplication.java:187)
E/UEHandler( 9066): 	at java.lang.Thread.run(Thread.java:818)
E/UEHandler( 9066): Caused by: java.lang.NullPointerException: Attempt to get length of null array
E/UEHandler( 9066): 	at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:60)
E/UEHandler( 9066): 	at net.bither.bitherj.e.a.a(Script.java:186)
E/UEHandler( 9066): 	at net.bither.bitherj.e.a.<init>(Script.java:107)
E/UEHandler( 9066): 	at net.bither.bitherj.core.Out.f(Out.java:160)
E/UEHandler( 9066): 	at net.bither.bitherj.core.a.z(Address.java:171)
E/UEHandler( 9066): 	at net.bither.bitherj.core.a.d(Address.java:140)
E/UEHandler( 9066): 	at net.bither.bitherj.core.a.<init>(Address.java:85)
E/UEHandler( 9066): 	at net.bither.bitherj.a.a.a.c(AbstractAddressProvider.java:968)
E/UEHandler( 9066): 	at net.bither.bitherj.a.a.a.b(AbstractAddressProvider.java:42)
E/UEHandler( 9066): 	at net.bither.bitherj.a.a.a$17.a(AbstractAddressProvider.java:709)
E/UEHandler( 9066): 	at net.bither.bitherj.a.a.a$17.a(AbstractAddressProvider.java:703)
E/UEHandler( 9066): 	at net.bither.d.a.b.b(AndroidDb.java:71)
E/UEHandler( 9066): 	at net.bither.bitherj.a.a.f.b(AbstractProvider.java:38)
E/UEHandler( 9066): 	at net.bither.bitherj.a.a.a.e(AbstractAddressProvider.java:703)
E/UEHandler( 9066): 	at net.bither.bitherj.core.b.z(AddressManager.java:119)
E/UEHandler( 9066): 	at net.bither.bitherj.core.b.<init>(AddressManager.java:57)
E/UEHandler( 9066): 	at net.bither.bitherj.core.b.<clinit>(AddressManager.java:43)

I did check and the folder in /storage/sdcard1/… is there. I moved it aside in case, and restarded, it was recreated and now contains:

cache:
    ad
    bither
        error.log

cache/bither/error.log contains another copy of the error

java.lang.ExceptionInInitializerError
	at net.bither.BitherApplication$1.run(BitherApplication.java:187)
	at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NullPointerException: Attempt to get length of null array
	at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:60)
	at net.bither.bitherj.e.a.a(Script.java:186)
	at net.bither.bitherj.e.a.<init>(Script.java:107)
	at net.bither.bitherj.core.Out.f(Out.java:160)
	at net.bither.bitherj.core.a.z(Address.java:171)
	at net.bither.bitherj.core.a.d(Address.java:140)
	at net.bither.bitherj.core.a.<init>(Address.java:85)
	at net.bither.bitherj.a.a.a.c(AbstractAddressProvider.java:968)
	at net.bither.bitherj.a.a.a.b(AbstractAddressProvider.java:42)
	at net.bither.bitherj.a.a.a$17.a(AbstractAddressProvider.java:709)
	at net.bither.bitherj.a.a.a$17.a(AbstractAddressProvider.java:703)
	at net.bither.d.a.b.b(AndroidDb.java:71)
	at net.bither.bitherj.a.a.f.b(AbstractProvider.java:38)
	at net.bither.bitherj.a.a.a.e(AbstractAddressProvider.java:703)
	at net.bither.bitherj.core.b.z(AddressManager.java:119)
	at net.bither.bitherj.core.b.<init>(AddressManager.java:57)
	at net.bither.bitherj.core.b.<clinit>(AddressManager.java:43)
	... 2 more

Anything i can do to fix it?

Hope this is the right place for this. Through a hardware defect I lost an old Bither cold wallet on an Android phone. As far as I remember it was not an HD wallet, e.g. from an older Bither version. I have the encrypted private key and the password to decrypt it. What is the best way to decrypt this key?

I made a private key for a new faucet, not expecting to get paid, but then they did pay and now I don't remember the password. Not a big deal because it's a tiny amount, but now I want to try using HDM, and I have to know the password for that too.

I could uninstall and re-install, but I hate to delete private keys. Before I wipe the wallet I thought I would check here to see if there were any options for me.

I probably just mashed on the keyboard for the password. Otherwise I think I would have wrote it down. EDIT: but maybe not if I had to enter the password twice, yikes. EDIT: gah, nevermind. I just remembered it.

https://www.youtube.com/watch?v=vyB83rUF5Sg&frags=pl%2Cwn

I cannot get into the app to get to my bitcoins.

Please fix the bug and update the app i will donate a nice amount to guys please!!

冷钱包扫描了交易二维码以后，没有反应。

似乎是 class QRCodeTxTransport 中的 formatQRCodeTransport 没有对非BTC地址的TX做处理。

isAddressHex 如果非BTC地址返回false

private static boolean isAddressHex(String str) {
    System.out.println("Is Address check, " + str);
    boolean isAddress = false;
    if (str.length() % 2 == 0) {
        try {
            String address = Base58.hexToBase58WithAddress(str);
            isAddress = Utils.validBicoinAddress(address);
            System.out.println(isAddress);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

热钱包是ANDROID手机，冷钱包是IOS。 获取BTG时，用冷钱包签名BTG发送交易时，扫描完成后直接退出，无任何提示！ 原以为需要升级冷钱包，把冷钱包里的面私钥全部作废，删除冷钱包，然后联网重新安装冷钱包，又重新逐笔导入新的私钥，他妈的折腾了一个小时。 重新在热钱包获取BTG，冷钱包扫描完交易后还是直接退出！！！

比太包钱包究竟在搞什么？！难道不知道用户用你的钱包很大程度上是看中冷、热存储功能吗？连一个领取BTG的功能都做不完善，还让用户怎么放心用！ 而且最可气的是发送BTG地址只能发到比特派钱包地址，强迫用户使用比特派钱包，增加用户的转账成本，我看你们也是快了！反正我以后是不会用了，去你妈的！

之前使用 bitcoinj 生成 HD 账户后，可以自行指定 HD 路径进行生成。

例如根据 bip-0044.mediawiki的path-levels 生成新地址，其路径是 m / purpose' / coin_type' / account' / change / address_index 其层级为 6（包括 m）。

那么比太钱包 HD 账户生成新地址的 HD 路径是如何规划的？层级多深？

@bithernet

Hi I'm trying to monitor my cold wallet (non HD one) and getting an error "Monitor bither cold failed" Any idea how could this be fixed? Thanks.

Hi Team

In the recent Play Store policy, it will become mandatory for you to fill out the Data Safety Section. Since this is an OSS Android app, it will make sense to have it as a part of the repository as well.

I have run the scan using my tool here on your repo, attached the scan results. I found the following 4 data types & 0 SDKs.

If this is helpful, do use our free tool to generate Play Store Data Safety report: https://github.com/Privado-Inc/privado

Also, do share your feedback & thanks for the OSS app 😄

funding.yml file https://docs.github.com/en/github/administering-a-repository/displaying-a-sponsor-button-in-your-repository

github sponsors https://github.blog/2020-03-24-getting-started-with-github-sponsors/

This commit from 2015 update the bitcoin donation address to: 1BitherUnNvB2NsfxMnbS35kS3DTPr7PW5 from 1BsTwoMaX3aYx9Nc8GdgHZzzAGmG669bC3 https://github.com/bither/bither-android/commit/1a80b72f0ed614ae26109d96fa1ab034fd2883e9

The new address is in repo & app in:

https://github.com/bither/bither-android/blob/1a80b72f0ed614ae26109d96fa1ab034fd2883e9/README.md#donation https://github.com/bither/bither-android/blob/a35f73d977bc901fdcbe384087800550c738707c/bither-android/res/values/strings.xml#L612

while in wiki the old address is used in:

1. Content of QR-Codes-content-format page: https://github.com/bither/bither-android/wiki/QR-Codes-content-format

In this way, our donation address: 1BsTwoMaX3aYx9Nc8GdgHZzzAGmG669bC3

2. every footer of wiki page like: https://github.com/bither/bither-android/wiki

Donate : 1BsTwoMaX3aYx9Nc8GdgHZzzAGmG669bC3 Google Play

https://github.com/bither/bither-android/blob/c4f4a684a0b88c7bfe8425dd0c1135ed2371c072/build.gradle#L9

latest: 4.2.2

https://github.com/bither/bither-android/blob/5455fdb71d18b68b719db18e056c85fe2ed1e61d/bither-android/build.gradle#L27

latest: 3.17.3

https://github.com/bither/bither-android/blob/5455fdb71d18b68b719db18e056c85fe2ed1e61d/bither-android/build.gradle#L28

latest: 28.0.0

https://github.com/bither/bither-android/blob/5455fdb71d18b68b719db18e056c85fe2ed1e61d/bither-android/build.gradle#L30

latest: 3.4.1

https://github.com/bither/bither-android/blob/5455fdb71d18b68b719db18e056c85fe2ed1e61d/bither-android/build.gradle#L31

latest: 1.0.3

https://github.com/bither/bither-android/blob/5455fdb71d18b68b719db18e056c85fe2ed1e61d/bither-android/build.gradle#L32

latest: 1.1.1-6