Re: Sync too low when using BitCoinJ to create and host own wallet

2017-08-30 Thread Andreas Schildbach 
What do you mean by 3rd party API? What does that API do? Bitcoinj is
designed to use the Bitcoin P2P protocol.


On 08/30/2017 04:12 AM, Alex Yang wrote:
> What I need is to create the wallet and just call 3rd party APIs to make
> the transactions.
> 
> In this case,  Do we need to set up a bitcoin node or we can just use
> bitcoinj to create a wallet and then use 3rd party APIs(The APIs will
> handle the sync etc.)? 
> 
> 在 2017年8月28日星期一 UTC+8下午11:00:25，Andreas Schildbach写道：
> 
> You will need at least one node to sync from, typically Bitcoin Core or
> some fork of it. PeerGroup automatically discovers peers and
> connects to
> a number of them.
> 
> 
> On 08/28/2017 10:57 AM, Alex Yang wrote:
> > Thanks Andreas! Do we need to install and run bitcoin-core or we just
> > need to set up the checkpointing?
> >
> > 在 2017年8月28日星期一 UTC+8下午2:38:51，Andreas Schildbach写道：
> >
> > See this document on how set up checkpointing:
> >
> > https://bitcoinj.github.io/speeding-up-chain-sync
> 
> >  >
> >
> >
> > On 08/27/2017 07:22 PM, Alex Yang wrote:
> > > I need to use BitcoinJ to create and host wallet on my own
> website.
> > > However, it keeps downloading blocks and the sync seems taking
> > forever.
> > > I need to be able to create a wallet within a few seconds.
> > >
> > > Could anyone please advice what should i do to optimize the
> sync
> > time?
> > >
> > > |ECKey key = new ECKey(); Address addressFromKey =
> > key.toAddress(params);
> > > Wallet wallet = new Wallet(params); wallet.importKey(key); File
> > > blockFile = new File(“/tmp/bitcoinblocks”); BlockStore
> blockStore
> > = new
> > > MemoryBlockStore(params); BlockChain chain = new
> > > BlockChain(params,blockStore); PeerGroup peerGroup = new
> > > PeerGroup(params, chain); peerGroup.addPeerDiscovery(new
> > > DnsDiscovery(params)); peerGroup.addWallet(wallet);
> > peerGroup.start();
> > > peerGroup.downloadedBlockChain(); |
> > >
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> >
> >
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Re: Sync too low when using BitCoinJ to create and host own wallet

2017-08-28 Thread Andreas Schildbach 
You will need at least one node to sync from, typically Bitcoin Core or
some fork of it. PeerGroup automatically discovers peers and connects to
a number of them.


On 08/28/2017 10:57 AM, Alex Yang wrote:
> Thanks Andreas! Do we need to install and run bitcoin-core or we just
> need to set up the checkpointing?
> 
> 在 2017年8月28日星期一 UTC+8下午2:38:51，Andreas Schildbach写道：
> 
> See this document on how set up checkpointing:
> 
> https://bitcoinj.github.io/speeding-up-chain-sync
> 
> 
> 
> On 08/27/2017 07:22 PM, Alex Yang wrote:
> > I need to use BitcoinJ to create and host wallet on my own website.
> > However, it keeps downloading blocks and the sync seems taking
> forever.
> > I need to be able to create a wallet within a few seconds.
> >
> > Could anyone please advice what should i do to optimize the sync
> time?
> >
> > |ECKey key = new ECKey(); Address addressFromKey =
> key.toAddress(params);
> > Wallet wallet = new Wallet(params); wallet.importKey(key); File
> > blockFile = new File(“/tmp/bitcoinblocks”); BlockStore blockStore
> = new
> > MemoryBlockStore(params); BlockChain chain = new
> > BlockChain(params,blockStore); PeerGroup peerGroup = new
> > PeerGroup(params, chain); peerGroup.addPeerDiscovery(new
> > DnsDiscovery(params)); peerGroup.addWallet(wallet);
> peerGroup.start();
> > peerGroup.downloadedBlockChain(); |
> >
> > --
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> .
> 
> 
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Re: Sync too low when using BitCoinJ to create and host own wallet

2017-08-28 Thread Andreas Schildbach 
See this document on how set up checkpointing:

https://bitcoinj.github.io/speeding-up-chain-sync


On 08/27/2017 07:22 PM, Alex Yang wrote:
> I need to use BitcoinJ to create and host wallet on my own website.
> However, it keeps downloading blocks and the sync seems taking forever.
> I need to be able to create a wallet within a few seconds.
> 
> Could anyone please advice what should i do to optimize the sync time?
> 
> |ECKey key = new ECKey(); Address addressFromKey = key.toAddress(params);
> Wallet wallet = new Wallet(params); wallet.importKey(key); File
> blockFile = new File(“/tmp/bitcoinblocks”); BlockStore blockStore = new
> MemoryBlockStore(params); BlockChain chain = new
> BlockChain(params,blockStore); PeerGroup peerGroup = new
> PeerGroup(params, chain); peerGroup.addPeerDiscovery(new
> DnsDiscovery(params)); peerGroup.addWallet(wallet); peerGroup.start();
> peerGroup.downloadedBlockChain(); |
> 
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