How to get notified of a new block using bitcoinj?

[ringti...@gmail.com]

Hi,

Am looking on how to get notified of the arrival of a new block. Can this be done? will it contain the block height info and the relay as well as timestamp?

thanks

[Andreas Schildbach]

Have a look at NewBestBlockListener and the
org.bitcoinj.core.AbstractBlockChain.addNewBestBlockListener() method.
If you prefer an example, the BuildCheckpoints tool (in the tools
subproject) has some code that does this.

[Nana]

great thanks appreciate it!

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massacre

[Nana]

Hi Andreas,

A few more things then i promise i wont bother again

1. how does one know if a new block is marked as "orphaned"?

2. through bitcoinj, can you get all block details, well height and then the timestamp? are these timestamps all UTC timezone? or the timezone of who finds the block?

Great thanks

Regards,

Neil

--

massacre

[Nana]

Hi

Am stuck

import org.bitcoinj.net.discovery.DnsDiscovery; //cant find this

my pom file

<dependency>

    <groupId>org.bitcoinj</groupId>

    <artifactId>bitcoinj-core</artifactId>

    <version>0.14.5</version>

</dependency>

<!-- https://mvnrepository.com/artifact/net.sf.jopt-simple/jopt-simple -->

<dependency>

    <groupId>net.sf.jopt-simple</groupId>

    <artifactId>jopt-simple</artifactId>

    <version>4.3</version>

</dependency>

<!-- https://mvnrepository.com/artifact/org.bitcoinj/bitcoinj-tools -->

<dependency>

    <groupId>org.bitcoinj</groupId>

    <artifactId>bitcoinj-tools</artifactId>

    <version>0.14.5</version>

</dependency>

any help please?

--

massacre

[Andreas Schildbach]

1. There is a second listener called ReorganizeListener. Orphaned blocks
will be in "oldBlocks".

2. Have a look at the "Block" class. The timestamp is UTC, but be aware
it can drift quite a bit (up to 2 hours) according to consensus.

On 11/09/2017 05:51 AM, Nana wrote:
> Hi Andreas,
>
> A few more things then i promise i wont bother again
>
> 1. how does one know if a new block is marked as "orphaned"?
> 2. through bitcoinj, can you get all block details, well height and then
> the timestamp? are these timestamps all UTC timezone? or the timezone of
> who finds the block?
>
> Great thanks
>
> Regards,
> Neil
>
>
> On Wed, Nov 8, 2017 at 7:18 PM, Nana <ringti...@gmail.com
> <mailto:ringti...@gmail.com>> wrote:
>
> great thanks appreciate it!
>
>
> On Wed, Nov 8, 2017 at 6:46 PM, Andreas Schildbach
> <and...@schildbach.de <mailto:and...@schildbach.de>> wrote:
>
> Have a look at NewBestBlockListener and the
> org.bitcoinj.core.AbstractBlockChain.addNewBestBlockListener()
> method.
> If you prefer an example, the BuildCheckpoints tool (in the tools
> subproject) has some code that does this.
>
>
> On 11/07/2017 11:24 AM, ringti...@gmail.com

> <mailto:ringti...@gmail.com> wrote:
> >
> > Hi,
> >
> > Am looking on how to get notified of the arrival of a new
> block. Can this
> > be done? will it contain the block height info and the relay
> as well as
> > timestamp?
> >
> > thanks
> >
>
>
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> <https://groups.google.com/d/topic/bitcoinj/Y4Z-v782D04/unsubscribe>.

> To unsubscribe from this group and all its topics, send an email

> to bitcoinj+u...@googlegroups.com
> <mailto:bitcoinj%2Bunsu...@googlegroups.com>.

> For more options, visit https://groups.google.com/d/optout

> <https://groups.google.com/d/optout>.
>
>
>
>
> --
> massacre
>
>
>
>
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