如何在使用 web3j 创建新钱包文件时修复 'no such algorithm ecdsa for provider bc'

Question

我在最新版本的 android studio 上执行此操作，最低 SDK 版本为 15 个依赖项：

> implementation fileTree(dir: 'libs', include: ['*.jar'])
> implementation 'com.android.support:appcompat-v7:28.0.0'
> implementation 'com.android.support.constraint:constraintlayout:1.1.3'
> testImplementation 'junit:junit:4.12' androidTestImplementation
> 'com.android.support.test:runner:1.0.2' androidTestImplementation
> 'com.android.support.test.espresso:espresso-core:3.0.2' implementation
> 'org.web3j:core:4.2.0-android' implementation
> 'com.android.support:multidex:1.0.3' implementation
> 'com.squareup.okhttp3:okhttp:3.14.0' implementation
> "io.reactivex.rxjava2:rxjava:2.2.2"

我的代码是：

public String createWallet() throws Exception {
        String path = Environment.getExternalStoragePublicDirectory(DIRECTORY_DOWNLOADS).getPath().toString();
        String fileName = WalletUtils.generateNewWalletFile("password", new File(path));
        return path + fileName;
}

Answer 1

you can check here!

@serso 提供了一个函数 "setupBouncyCastle()"，您必须将其放入 class 并在 onCreat 中调用它。这将 Android 版本的 Bouncy Castle 替换为已发货的版本！就像他说的。 ^^

Answer 2

如果您正在准备带有 minifyEnabled 的发布版本，并且遇到此异常：

 java.security.NoSuchAlgorithmException: no such algorithm: ECDSA for provider BC

将这些行添加到 pro-gurd

-dontwarn java8.util.**
-dontwarn jnr.posix.**
-dontwarn com.kenai.**

#-keep class org.bouncycastle.**
-dontwarn org.bouncycastle.jce.provider.X509LDAPCertStoreSpi
-dontwarn org.bouncycastle.x509.util.LDAPStoreHelper

-keepclassmembers class org.web3j.protocol.** { *; }
-keepclassmembers class org.web3j.crypto.* { *; }

-keep class * extends org.web3j.abi.TypeReference
-keep class * extends org.web3j.abi.datatypes.Type

#-dontwarn java.lang.SafeVarargs
-dontwarn org.slf4j.**

谢谢Mimo Saha

如何在使用 web3j 创建新钱包文件时修复 'no such algorithm ecdsa for provider bc'

how to fix 'no such algorithm ecdsa for provider bc' while creating new wallet file using web3j

android

web3-java