Anyone? I am sitting here waiting for a reply for the last three years 

I have started the bitcoind, waited it to synchronize with network and then stopped via bitcoin-cli stop (this is the correct way as per docs). After a few minutes I copied chainstate and run your software - unfortunately, it still dying with the same error. So it seems like there some problem with leveldb library - maybe it is too old (1.12.0) and incompatible with bitcoin core 0.16.0 database.

Ok I will be waiting and monitoring your git for the version which catches leveldb error.

Thank you for your help. I appreciate it.

Sure. Here is the script that stops my bitcoind. Is this correct stopping?


I stopped it before copying. I am using bitcoin core 0.16.0

I hope so. I have re-installed it two times from the scratch just now. Re-installed dependencies and even installed it under different user - same result.

Can you please take a look at the install log? Here is it: https://pastebin.com/z7h6sdmD

Anything suspicious? What additional info can I provide you with to identify/fix the problem?

Thank you very much!

Hello starmyc 

First of all, thanks for a great software. But I am struggling to get it working.

I am on CentOS 7 (7.5.1804)

You stated earlier in this thread that yum install leveldb-devel will be enough to install LevelDB on my OS but I found that CentOS repos doesn't have that lib, so i searched and found it on epel repo.

Running yum install leveldb-devel installed LevelDB 1.12.0 with headers. Then I installed chainstate with no errors, but when I try to run it I am getting this:


And this:

What am I doing wrong?
Thank you for your help!

dserrano5, great piece of code, works like a charm. The inline C code based on openssl you provided generates over 1500 pubkeys per second which is 5+ times more than any native Perl implementation of secp256k1 curve.

But it seems there might be significant improvement in speed if the code written using inline C based on libsecp256k1 (#include <secp256k1.h>) library. Unfortunately, I am not familiar with C enough to do that. Can anyone rewrite dserrano5's code to use libsecp256k1 lib to generate compressed/uncompressed pubkeys from private key? It should be working many times faster.

Thanks in advance! Would be glad to donate

PS: This is kind of an old thread but I think it not worth opening a new one so I decided posting here as here is all the pre-history present. Sorry if I am wrong.

UPD: The code seems to have a memory leak because after running it for 24 hours it takes 37% of memory on my server with 48Gb RAM.

Same here. Nine hours since last successful log in. While inspecting the network during login process there is a few HTTP 502 responses. Seems like some blockchain.info's server is down. No any official update on that.

P.S.: Transferred my coins away from BC.I to stay safe  

UPDATE: It works for me now