Downloading the blockchain manually
(guide previously here https://www.reddit.com/r/nyancoins/comments/39q86v/downloading_the_nyancoin_blockchain_manually/ )
For those who'd like to download a snapshot of the blockchain manually and save themselves some time:
(Note: this may not work cross-platform, the snapshots were created on windows and may not work on Linux or MacOS X)
Downloading a Blockchain snapshot
These Snapshots are provided by me (/u/vmp32k) in irregular intervals.
Verify snapshot authenticity
Simple: SHA1 hashsum comparison
Generate a SHA1 hash sum of the snapshot you downloaded and compare it to the hash sum in the table above:
A hash-sum mismatch may indicate a broken download or that the file has been tampered with.
Advanced: check GPG signature validity
Download my GnuPG public key and import it (this only needs to be done once):
wget https://wiki.nyan.space/admin-at-nyan.space.asc gpg --import admin-at-nyan.space.asc
and check the validity of the signature:
# Download the matching signature from the table above (if you haven't already) # wget https://nyan.space/2016-10-16_NyanCoin-Blockchain.tar.xz.asc gpg --verify 2016-10-16_NyanCoin-Blockchain.tar.xz.asc
GnuPG might tell you that the signature is untrusted but valid, this is completely fine.
If GnuPG can not validate the signature, the snapshot or signature download may be broken or been tampered with.
Extracting a Blockchain snapshot
The snapshot contains everything you need to get your Wallet synchronized quickly:
Extract these three files to your wallet directory:
%APPDATA% is a special environment variable on Windows PCs which always points to the current users' "Roaming Application Data" directory. If the
NyanCoin directory doesn't exist, you can create it either manually or by running the NyanCoin wallet first. Don't forget to shut down the wallet again before you extract the snapshot.
Extract the snapshot to the .nyancoin sub-directory in your home directory:
tar xvfJ 2016-10-16_NyanCoin-Blockchain.tar.xz -C ~/.nyancoin/.
You may need to create the
.nyancoin directory if it doesn't exist already before running tar.
On Mac OS X:
<to be written>