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Bitcoin / Development & Technical Discussion / Blockchain explorer reads from a chain not from external database
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on: June 28, 2019, 05:42:00 AM
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I have done a lot of research but 100% of open source blockexplorers I found use external database to store blockchain information. There are few so-called "crawlers" but they are all too old and just for a few simple calls.
What I made at the end is Bitcoin RPC compatible blockchain explorer written in GoLang which reads blocks and tx data directly from the chain and use external database just for some collected or calculated data which can not be pulled directly from a chain, as are addresses data, rich list, etc..
My point was, why should I use an external database when there is one already, a chain. Please just don't tell me MySQL or MongoDB is so much faster that is mandatory to use them. After I did a lot of tests I found my way was enough fast and with the usage of some cache I got really good results, even it runs from a local FreeBSD machine connected with ADSL 10/1Mbits I was getting so fast results from distant locations that I was amazed.
Starting point whit which I was confused was the number of confirmations of a single block which rises when a new block appears on the network. So, or it is needed to be read again from a chain or needs to have some script to update that number in a database. That is how I end up with this "direct from blockchain" technic.
Please share some thoughts on this if you know some particular reasons why should be external database based or do you find my way better to do.
Thank you all in advance.
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Alternate cryptocurrencies / Service Announcements (Altcoins) / [ANN] BitStickers.net - Cryptocoin stickers crowd funding
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on: August 26, 2015, 07:03:40 PM
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We are proud to present our new service crowd funded printing of sticker for fans of crypto currencies.Because of to many coins popping out each day there is no chance to follow all with print. We decided to ask communities first and when community wants to make stickers we help by organizing crowd funding and print. As the minimum we need to print is 5000 pcs ($250) which is to high number for most of the communities we decide to split print on 8 slots, so communities can fund together full print. | Rules:
Number of positions : 8
One graphic can be on 1 or maximum 8 positions.
Each coin can have one or more graphics.
Community must provide graphics.
Graphics must be round vector or minimum 1000px1000px image.
One position funding price $40
Number of shares 40
One share price $1
Size 35mm
Print 600pcs
8 slots at once
8 slots can be each different design
Full batch 5000pcs $250
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Printing starts when all 8 positions are sold.
After position funding is fulfilled another round starts automatically, so you can fund two or more positions.
In period of 10 days after production is done all participants of funding can claim their share of printed stickers and order them free, paying only shipping expenses.
Community will get coupon code with which members can order free stickers that nobody claimed (maximum 20pcs), also paying only shipping expenses.
Printing is done on format which contains 8 circle positions each 35mm diameter.
All positions must be sold before printing start.
If you are interested in printing all 8 slots for your coin we will offer a discount of 5000pcs for $250.
If this arrangement is claimed, there is no need to wait for other positions to be sold once payment is made.
Contact us for arrangement.
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NEXT PRINT BATCH:Available designs for crowd funding:
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Alternate cryptocurrencies / Announcements (Altcoins) / [ANN] ParallelCoin - DUO - SHA256 + Scrypt | HardFork Soon!!! We are going Go!
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on: June 22, 2015, 10:30:14 PM
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 WEB SITEWhat is Parallelcoin?Parallelcoin is an new digital currency that enables instant payments to anyone, anywhere in the world. Parallelcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Parallelcoin is also the name of the open source software which enables the use of this currency. ParallelCoin specificationsMulti-algo proof of work crypto currency. Fair release with no premine, no IPO and no ICO. Algorithms: SHA256D & SCRYPT Abbreviation: DUO Total Coins: 1,000,000 Block Reward: Blocks 1-998 = 0.02 DUO (Fair Release) | Blocks > 998 = 2 DUO Block Time: 5 minutes Halving Interval: 250,000 blocks P2P Port: 11047 (21047 Testnet) RPC Port: 11048 (21048 Testnet) DownloadsPlease note: The old Parallelcoin wallet-qt (v1.0.0.0) does still work. The new Parallelcoin wallet-qt (v1.2.0.0) was done to change the main overview page back to normal qt-view. If your wallet does not want to start syncing:Try adding these nodes to your configuration (parallelcoin.conf file located in the wallet folder): addnode=185.69.55.35:11047
addnode=46.28.107.182:11047
addnode=91.206.16.214:11047
addnode=157.161.128.62:11047
addnode=85.15.179.171:11047
addnode=103.254.148.9:11047
addnode=144.217.73.92:11047
addnode=165.227.110.22:11047
addnode=194.135.88.119:11047
addnode=73.164.170.207:11047
addnode=76.176.77.120:11047
addnode=89.40.12.55:11047
addnode=coins.prohashing.com:6245
ResourcesTakeover infoThere are a few of us which like the idea of this coin very much. We (the community) think that the coin has a big potential and is worth to continue. There is no premine and the multi-algo sha256d and scrypt was and is trendsetting. So the time is right for a restart. The original developer, Parallaxis (probably Blazr2) was last active on 19th of August 2014 on Bitcointalk. Over the last year we tried to get in contact, but there has neven been a reply on all our messages. So we kept supporting Parallelcoin over all the months and finally the time has come for a community takeover. We created a new Parallelcoin website, block explorer, nodes, a Parallelcoin sha256d pool and achieved that DUO is available for trading on Cryptopia coin exchange. You can be part of this community. Start to mine Parallelcoin and spread the word. If you have further ideas that could help and support the coin (new exchanges, new pools, whatever else), do not hesitate to post your ideas to this new thread. OLD THREADMarketingTwitter and signature campaign soon!  |
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Other / Meta / Alternate cryptocurrencies > Announcements (Shitcoins)
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on: June 04, 2015, 02:23:42 PM
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I have an idea.
Why don't moderators make section Alternate cryptocurrencies > Announcements (Shitcoins)
It is more than obvious when some "dev" make OP for some new coin is it shit or not.
What makes some coin shit?
Lack of info, poor design, no roadmap, newbie profile, dev not posting in topic etc...
So when some coin proved to be shit just move its topic there.
I know this idea looks quite unserious, but in see of shitcoin people can not see true values and the point of this technology and only thing is someone is trying to take money someone else by not doing a thing beside alter some coin's code, release it as new coin, ask for ICO or some other scammers technique, and than vanish with stupid people's money.
Also I know Alternate cryptocurrencies > Announcements (Shitcoins) will never happen but those are my thoughts.
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Economy / Services / ░▒░▒▓ ▓ ▓ Crowd funded Bitcoin node ▓ ▓ ▓▒░▒░
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on: May 26, 2015, 06:46:02 PM
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A full node is a program that fully validates transactions and blocks. Almost all full nodes also help the network by accepting transactions and blocks from other full nodes, validating those transactions and blocks, and then relaying them to further full nodes. Most full nodes also serve lightweight clients by allowing them to transmit their transactions to the network and by notifying them when a transaction affects their wallet. If not enough nodes perform this function, clients won’t be able to connect through the peer-to-peer network—they’ll have to use centralized services instead. Many people and organizations volunteer to run full nodes using spare computing and bandwidth resources—but more volunteers are needed to allow Bitcoin to continue to grow. This document describes how you can help and what helping will cost you. ░▒░▒▓ ◈◈ 99 shares - $1 per share ◈◈ ▓▒░▒░ NODE SPECIFICATIONS:
Period: 1 year
Dedicated IP: 1
CPU: 2 x 2.40 GHz
RAM: 2048 MB
Storage: 80 GB
Bandwidth: 2 TB Spread the word: [url=https://bitnodes.net/services/crowdfunding/bitcoin-node/][img]https://bitnodes.net/media/cf/bitcoin-fund-b.jpg[/img][/url]  [url=https://bitnodes.net/services/crowdfunding/bitcoin-node/][img]https://bitnodes.net/media/cf/bitcoin-fund-wide-a.jpg[/img][/url] Crowd funding is not limited to one node. After we collect funds for one node we will start another funding for second node and so on. |
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Alternate cryptocurrencies / Service Announcements (Altcoins) / [ANN] BITNODES - crypto coin managed node hosting services - node crowd funding
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on: May 12, 2015, 07:50:23 PM
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Cryptocurrency Node
Full-Managed Hosting Service
No crypto coin node configuration knowledge?
No time to build crypto coin node and manage it?
Look no more!
We have a solution for you!
Simple as 1 2 3!
1.Choose configuration - 2.Fill coin info - 3.Pay
Services are fully managed by us. User needs to provide an only contact e-mail and to pay expenses of the chosen service. After service setup user gets a confirmation e-mail with IP address of a server on which services are hosted after what user can check the status of service he paid. There is no control panel or any further actions required from the user.- All services are anonymous, we are not collecting any information or request anything except e-mail and payment
- Request RPC user and password if need and we will configure RPC allow to your IP address
- We handle all node and blockchain maintenance, upgrades, security and data backups
- No need for any server configuration knowledge or waisting time dealing with node
- Every new crypto coin in our system get free block explorer with first node
- Our standard delivery time for services is 24h for most crypto coins
- Free hostname for every node NODE-NAME.bitnodes.net
- As payment method we accept over 50 crypto coins
- 24/7 monitoring and uptime check
- All services are year based
Crowd funding
10 nodes on 10 different geographical locations all over the world
Funding node starts with 400 shares.
One share is $1 worth.
You can choose with which amount of shares you want to support building your coin node network.
If your coin is not listed here please contact us and we will make a new fund for your coin’s node network.
Here is list of coins for which we have made fund. If you are a developer of some coin and want your coin to get in our system for crowdfunded node please contact us over the site or here by PM.
Setup of node crowd funding is free of charge!
You just need to confirm to us that you are interested, and place a node crowd funding banner or link in your OP or on your website.
-------------------------------------------------- Examples:| | -----------------
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Accepted methods of paymentAutomatic  ManualWe accept any cryptocurrency which is on an exchange and have trade volume. We keep the right to accept or reject the payment method. If you want to pay in any crypto coin which is not on the automatic list please contact us for further details.
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Economy / Services / PHP developer needed
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on: February 10, 2015, 06:03:07 AM
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Hello community members, I need some experienced PHP developer to do some job for me. There is few PHP scripts I want to adjust for my needs. Please PM if interested so we can discus is it possible to do that and which price could be for that jobs. Thank you!  |
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Economy / Goods / For merchants - Bitcoin Accepted Here Sticker Simple Pack
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on: June 21, 2014, 12:57:15 PM
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Bitcoin accepted here sticker is for indoor use, non water proof, for merchants. This sticker applies inside by your cashregister or other place. Printed on self-adhesive vinyl with easy peel-and-stick back using high quality inks with protective PVC coating. Available in Opaque (white). Price: $10Bitcoin Accepted Here Sticker Simple Pack contain:- Bitcoin Accepted Here Sticker 316x116mm x 1
- Bitcoin Accepted Here Sticker 159x58mm x 10
- Bitcoin Accepted Here Sticker 79x29mm x 10
- Bitcoin Accepted Here Sticker 40x19mm x 20
- Bitcoin Accepted Here Sticker For Inside Window 157x58mm x 3
 ORDER |
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Alternate cryptocurrencies / Marketplace (Altcoins) / DOGE BQC CLR DEM DGB EAC HBN OGC PHS PXC QRK RED WDC SBC ARG ELC Stickers
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on: January 29, 2014, 05:58:12 PM
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Hello community, I am happy to announce new altcoin stickers on Bitstickers.net. Dogecoin, BBQCoin, Copperlark, Deutsche eMark, Digibyte, Earthcoin, Hobo Nickels, Online Gaming Coin, Phenixcoin, Philosopherstone, Quark coin, Redcoin, Worldcoin, Stablecoin, Argentum, Elacoin and some other that we had before but in bigger format. Check out my shop: http://bitstickers.net/product-category/altcoins/ |
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Alternate cryptocurrencies / Marketplace (Altcoins) / LTC FTC ANC CGB DGC EXC FST FRK MEC GLD XPM MEM TRC TAG Stickers
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on: December 20, 2013, 10:00:33 PM
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I am happy to announce altcoin stickers on Bitstickers.net. Anoncoin, Cryptogenic Bullion, Digitalcoin, Digitalcoin, Extremecoin, Fastcoin, Feathercoin, Franko, Goldcoin, Litecoin, Megacoin, Memecoin, Primecoin, Tagcoin and Terracoin. Check out my shop: http://bitstickers.net/product-category/altcoins/ |
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Bitcoin / Bitcoin Discussion / BTC no more real p2p ?
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on: June 21, 2013, 01:54:56 PM
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As I see year from now there will be no miners with small power, not counting GPU miners, that is already almost dead for mining btc, but small power that will be 100GH/s per miner next year, because as it looks like there will be just few big asic farms that will hold the bitcoin network, because network will rise so much that for all small miners will be not rentable.
So my conclusion is that btc is loosing peer to peer system, if all ends on 10 peers we will again have system that is in hands of few. Ok shares of many people in that hashing power but all infrastructure will be centralized, power will not be in peoples hands if you understand me.
Am I wrong or this is next level of evolution of bitcoin?
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