How-to list on an Exchange
- 1 Overview
- 2 Standard Information
- 3 Technical Setup
- 4 Technical Integration
- 5 Examples
- 6 Appendix
VeriBlock is a decentralized blockchain and any exchange can list the coin.
CoinMarketCap provides a list of common exchanges:
An unofficial list of exchanges that VBK is listed on can be found here:
Most exchanges will need basic information, usually collected in a form:
Details on MainNet launch: MainNet_Launch_Overview
|Name of Coin||VeriBlock|
|Coin trading symbol||VBK|
|Project official website||https://www.VeriBlock.org/|
|Logo for coin 1000|
|Logo for coin 32|
|Logo for other sizes||Other Logos|
|MainNet Launch date||25-Mar-19|
|Latest version of project whitepaper||http://bit.ly/vbk-wp-pop (May 13, 2019)|
|Link to sourcecode||https://github.com/VeriBlock|
|What country is the project based in?||Cayman Islands|
|Official blockchain explorer||https://explore.veriblock.org|
|Is the token an ERC20?||No|
|Is there a ledger or "rich list"?||https://explore.veriblock.org/api/stats/ledger|
|Maximum Supply||2.1 Billion|
|Divisibility||8 Decimal Places (0.00000001 VBK)|
|Token Type||Native blockchain|
|Forked from another coin?||No, custom development|
|How many token holders do you have||This changes, but can be seen from the rich list|
|Which industry does your project belong to||Infrastructure utility coin for all industries|
|Short Description||VeriBlock and its novel Proof-of-Proof (“PoP”) consensus protocol is the first and only technology in the world to allow any blockchain to inherit Bitcoin’s unprecedented thermodynamic Proof-of-Work security in an entirely Decentralized, Trustless, Transparent, and Permissionless (“DTTP”) manner.|
|Key Feature 1||Bitcoin-Level Double-Spend Protection: Transactions on VeriBlock-secured blockchains have the same security as transactions on Bitcoin itself.|
|Key Feature 2||Early Attack Detection: Early Attack Detection (EAD) metrics emitted by VeriBlock-secured blockchains describe the security of a particular transaction at any point in time.|
|Key Feature 3||Mobile/Lightweight ("CPU") Mining: Proof-of-Proof mining can be performed with minimal hardware requirements (a PoP miner could even run on a phone or Raspberry Pi).|
|BTC Talk Announcement||https://bitcointalk.org/index.php?topic=3133450.0|
More technical details can be found here: HowTo_Integrate_NodeCore_with_a_Service
The NodeCore daemon is the full-node software for the VeriBlock blockchain.
Run an instance of NodeCore
The hardware and software requirements to run NodeCore are here: NodeCore_Operations#Requirements
Connect to NodeCore
Test basic connection with the NodeCore CommandLine
Once NodeCore is running, you'll want to optimize it for the needs of an exchange, such as secure remote connections and lower peer count to increase stability. See #Securing NodeCore.
Configure NodeCore by updating the properties file (see: nodecore.properties) and restarting.
#NodeCore Configuration #allow grpc connectivity via whitelisting rpc.bind.address=0.0.0.0 rpc.whitelist.addresses=220.127.116.11,18.104.22.168 #limit the max peers peer.max.count=12 #disable bootstrap peers peer.bootstrap.enabled=false peer.external.hosts=22.214.171.124\:7500,126.96.36.199\:7500
Use Offline Wallet
The NodeCore suite has an Offline Wallet CLI, which may be useful for exchanges: Offline Wallet CLI
This allows offline wallet functionality such as creating a new address, encrypting wallets, or creating (but not broadcasting) a transaction.
There are multiple layers of security:
|Security Feature||Description||See More|
|IP WhiteListing||The client's IP must be whitelisted in order to connect to a remote node.||NodeCore Networking|
|Wallet encryption||A wallet file is encrypted. Encrypted wallets can be managed through gRPC commands or using the offline wallet CLI..||Wallet Encryption|
|Multisig addresses||The wallet takes multiple signatures, so funds can remain safe despite a particular private key or wallet being compromised, if general multisig good-practices are followed.||How to Submit Multisig Tx|
|Offline address creation||A wallet can be created and managed without any network connectivity.||https://github.com/VeriBlock/offline-wallet-cli|
|gRPC password (with TLS)||The gRPC connection has a password, and the communication channel is encrypted.||NodeCore_Networking#Passwords|
Occasionally, NC will need updating. The following instructions cover updating an instance of NodeCore running on a Linux machine. It assumes that you have already downloaded and unzipped/untarred the folder containing the new NodeCore software you want to migrate to.
See: NodeCore_Operations#Start to run NodeCore in a loop
#in NC_CLI, stop old NodeCore (downtime starts here): stopnodecore #on NodeCore box, move the mainnet folder with all the blockchain data: mv /<path>/nodecore-0.4.X+1/bin/mainnet /<path>/nodecore-4.X+2/bin/mainnet cd /<path>/nodecore-0.4.X+2/bin #run the loop version (more robust): ./nodecore-loop
where ./nodecore-loop may be the file:
while true do ./nodecore read -t 30 echo Restarting NodeCore... done
It is important to have a reasonable sleep/pause time (such as 30 seconds) to make it easy to stop the node (stopnodecore) gracefully without it automatically restarting.
Running an exchange requires standard operations that must be automated, including creating addresses, tracking incoming coins, and sending coins.
HTTP API Examples
Most often, an exchange will call the http api using their preferred language.
Most exchanges will either:
- Call SendCoins directly -> very easy: NodeCore_HTTP_API#sendcoins
- Create a signed transaction and submit to the network -> here is an end-to-end example of calling the http api: https://github.com/VeriBlock/nodecore-js/blob/master/packages/core/example/2_create_and_submit.js
The following repo demonstrates calling such functions in C#:
Java samples can be inferred from the GUI wallet: https://github.com/VeriBlock/nodecore-wallet-ui
The above file also shows how to automate encryption/decryption of wallets.
Community members have created python and node.js samples [DISCLAIMER: These are community contributions and may change]:
- Python --> https://github.com/speedrunner911/vbk-grpc-python-examples
- Node --> https://github.com/speedrunner911/vbk-grpc-node-examples
Can call the API for sendcoins NodeCore_HTTP_API#sendcoins But an exchange may need to submit a signed transaction instead:
Here is a step-by-step explanation: https://github.com/VeriBlock/nodecore-js/tree/master/packages/core#examples
Here is a single-file end-to-end example: https://github.com/VeriBlock/nodecore-js/blob/master/packages/core/example/2_create_and_submit.js