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 > <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(); | > > > > -- > > You received this message because you are subscribed to the Google > > Groups "bitcoinj" group. > > To unsubscribe from this group and stop receiving emails from it, > send > > an email to bitcoinj+u...@googlegroups.com > > <mailto:bitcoinj+u...@googlegroups.com>. > > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google > Groups "bitcoinj" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to bitcoinj+unsubscr...@googlegroups.com > <mailto:bitcoinj+unsubscr...@googlegroups.com>. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "bitcoinj" group. To unsubscribe from this group and stop receiving emails from it, send an email to bitcoinj+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
