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Project Description

sqlChain is a compact SQL layer that runs on top of bitcoind. It extends the query options on the blockchain with a priority placed on low storage overhead. It provides multiple API (compatible) interfaces:

  • Insight API (plus some extensions, like /api/closure)
  • Blockchain.info API (including websocket)
  • RPC via POST, GET urls
  • Web Interface (using bootstrap, integrated with API backend, primarily a demo)
  • Electrum Server

(at this time a demo server is being tested locally, but later will be hosted publicly)

sqlChain currently consists of three daemon programs.

  • sqlchaind - monitors bitcoind and updates a mysql database
  • sqlchain-api - provides multiple API interfaces over the mysql database
  • sqlchain-electrum - runs a private electrum server over the sqlchain-api layer

Recent Updates

Added sqlchain-init and installation guide (INSTALL.md) to help users get up and running. I’ve tested some more on Amazon EC2 and now also on a regular VPS account. So it’s starting to get some workout and more bugs fixed. It sure runs faster on the VPS. I’ve found you can build a custom bitcoind and then rsync it up to the server and place in /usr/local/bin to override the default package install. That works.

Added pruning support using “manual pruning”, prune=1 in bitcoin.conf. This currently requires a custom build with PR #7871 but it’s fairly painless and a better way of dealing with pruning blocks once they’ve been processed into MySQL. With the current blockchain size of 101 GB I’m hopeful this will cut down total storage to about half, maybe.

sqlchain-api now uses the gevent.websocket module to provide a low overhead, highly concurrent, WSGI based server. In theory, thousands of connections could use either the websocket, or more simply, the long polling sync api.

A new blkdat module enables syncing directly from block files. Now sqlchain can build sql data even as bitcoind syncs itself, saving a lot of time on low-end systems.

sqlChain is still Alpha level software under active development (not ready for prime time) - but I’m busy on getting it there. For this reason the IRC peer discovery for public Electrum servers is not yet implemented, and wont be until enough testing has been completed.

TODO

  • open server for demo purposes as public api
  • more testing on Electrum server operation
  • look further into pruning spent trxs (most of blob.dat) for a wallet api with even lower storage needs
Release History

Release History

0.1.25

This version

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0.1.24

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0.1.23

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0.1.21

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0.1.20

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0.1.19

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0.1.17

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0.1.16

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0.1.15

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0.1.14

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0.1.13

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0.1.12

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0.1.10

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0.1.9

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
sqlchain-0.1.25.tar.gz (278.3 kB) Copy SHA256 Checksum SHA256 Source Jan 12, 2017

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