Could you suggest any solution for this issue. I have also tried to save
wallet object in database using WalletProtoBuf but i was not able to
synchronize wallet and also faced issues like balance mismatch and dead
transaction , so i revert back to my previous approach (HashMap).
Based on your reply bitcoinj is not suitable for creating web application .
It would be great, if you could able to suggest some solution to solve this
issue because we are using bitcoinj in 4 project . 1 project is in
production with around 700 users.
On Tuesday, November 14, 2017 at 1:00:18 AM UTC+5:30, Andreas Schildbach
wrote:
>
> It's known issue. Bitcoinj is designed around the assumption of approx.
> one wallet per device (or at least only a low number). The "webwallet"
> usecase has always been excluded.
>
>
> On 11/13/2017 06:32 PM, Ajit Soman wrote:
> > I have a java web application. When ever a user signup i create a wallet
> > for them. I use the below code to create wallet for user and put that
> > wallet object in Map<String,Wallet>.
> >
> > |
> > /**
> > * This is the global map that maintain wallet across application. When
> ever
> > * i have to get balance or make transaction i use wallet object in the
> map.
> > *
> > * The main reason for doing this is that Wallet object in map will
> always
> > * be in synchronization with the blockchain
> > */
> > Map<String,Wallet>applicationWalletMap =newHashMap<String,Wallet>();
> >
> >
> > publicvoidcreateWalletForUser()throwsIOException{
> > intbits =128;
> > SecureRandomrandom =newSecureRandom();
> > DeterministicKeyChaindeterminstickeychain
> > =newDeterministicKeyChain(random,bits);
> > DeterministicSeedseed =determinstickeychain.getSeed();
> > System.out.println("seed "+seed.getSeedBytes());
> > Walletwallet =Wallet.fromSeed(TestNet3Params.get(),seed);
> > ECKeyeckey =newECKey();
> > wallet.importKey(eckey);
> > StringfileName =UUID.randomUUID().toString();
> > wallet.saveToFile(newFile("/opt/"+fileName+".dat"));
> > System.out.println("Wallet has been created");
> > applicationWalletMap.put(fileName,wallet);
> > }
> > |
> >
> >
> >
> > Also I put all user's synchronized wallet object in
> > *applicationWalletMap *when i start web application.
> >
> > The issue is that when user keep on increasing the size
> > of *applicationWalletMap *increases. *This consumes a lot of RAM*. So is
> > there is any efficient way to handle this problem.
> >
> > Thanks in advance
> >
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