Hi Minh,

do you mean you run a bitcoin core full node locally and want to connect 
bitcoinj to it? I didn't try that but you'll have to use a Peer instead of 
a PeerGroup and configure the Peer with IP 127.0.0.1 I guess.

@J-Miguel: I'll answer later today after work.

Best regards,

Tobias

On Wednesday, January 11, 2017 at 5:25:34 AM UTC+1, Minh Le Quang wrote:
>
> Hi Tobias,
> *   Can you tell me "how to user bitcoinj with my localhost"?*
>
> Best regards,
>
> Vào 05:26:38 UTC+7 Thứ Tư, ngày 11 tháng 1 năm 2017, Tobias B. đã viết:
>>
>> Hi J-Miguel,
>>
>> I'm doing excatly that for quite some time now: Using bitcoinj in the 
>> backend of a spring boot webapplication (still in development). The a bit 
>> frustrating thing I noticed is that bitcoinj is not really built to handle 
>> the bitcoin payment logic for potentially many users. It's my impression 
>> that it's really made for phone wallets or small scale bitcoin 
>> applications. 
>> In my post here 
>> https://groups.google.com/forum/#!topic/bitcoinj/FFI0qtIl4PU you see 
>> that it's not really possible to sync bitcoinj once you have a big number 
>> of keys in your wallet (e.g. ~200k). Maybe that's possible once you run 
>> your own full node and connect bitcoinj to it - I'm not sure. But also 
>> bitcoinj can't "forget" old issued keys that you'll not expect to receive 
>> payments to. So every address you ever issued and showed to a user will be 
>> tracked for ever and cause a listener callback for every new block. So the 
>> amount of work your application has to handle every 10 minutes will grow 
>> over time.
>>
>> And yes I use the WalletAppKit class it bundles a lot of things like 
>> saving the wallet to disk, connecting it to the peerGroup etc. I still 
>> operate outside of the wallet logic, you have access to the internal 
>> objects such as transactions, issued receive addresses via 
>> walletKit.wallet()
>>
>> Best regards,
>>
>> Tobias
>>
>> Am Dienstag, 10. Januar 2017 21:59:55 UTC+1 schrieb jmiguel rodriguez:
>>>
>>>
>>> Hi,
>>>
>>> This is my first message here, so hello to everyone. And (many, many, 
>>> many) thanks to Mr. Andreas Schilbach for this amazing piece of code. 
>>>
>>> Well... I'm just starting playing int this arena so I'm a bit confused 
>>> with all infrastructure (not with blockchain technology but with bitcoinj 
>>> internals).  As far as I can see, it looks bitcoinj it's more oriented to 
>>> GUI (javafx, andrond) than webapps. At least, the WalletAppKit class look 
>>> like that to me.
>>>
>>> Should I be able to use WalletAppKit for starting in a Web (Grails, 
>>> Spingboot based) application?. Would it be better approach to use 
>>> 'low-level' classes directly than alll the threaded and hellish callback 
>>> GUI style?.  If this is the best way, where could I find a good (updated) 
>>> tutorial?
>>>
>>> Thank you all in advanced!
>>>
>>>
>>>  regards,  
>>>  jmiguel
>>>
>>>

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