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README.md

Blocknet's Blockchain Configuration Files

This repository contains:

  • The blockchain configuration files needed for trustless exchange(XBridge) on the Blocknet Protocol;
  • An overview of the file structure and contents;
  • Directions on how to create configuration files from scratch;
  • Directions on how to setup configuration files for use of the Blocknet Protocol;
  • Directions on how to test a blockchain for compatibility with XBridge;
Website API Documentation Discord

Table of contents

Configuration File Overview

The data structure of the configuration files is designed to accommodate for versioning. There are 5 data sets as follows:

  • manifest-latest.json - Contains the latest official master data and versioning reference of each blockchain.
  • manifest.json - Contains the work-in-progress master data and versioning reference of each blockchain.
  • manifests - Contains archived manifest versions that align with Blocknet wallet releases.
  • xbridge-confs - Contains the versioned XBridge configuration files for each blockchain.
  • wallet-confs - Contains the versioned wallet configuration files for each blockchain.

Manifest File

The manifest-latest.json contains an array of objects with each object containing versioning information for each supported blockchain. The format of each object is as follows:

{
    "blockchain": "",
    "ticker": "",
    "ver_id": "",
    "ver_name": "",
    "conf_name": "",
    "dir_name_linux": "",
    "dir_name_mac": "",
    "dir_name_win": "",
    "repo_url": "",
    "versions": [],
    "xbridge_conf": "",
    "wallet_conf": ""
}
Key Description
blockchain The name of the blockchain: Blocknet, Dogecoin, Syscoin, etc. This is user-facing, case-sensitive, and should remain consistent across all version groups for this blockchain.
ticker The abbreviation used to represent this blockchain on exchanges: BLOCK, DOGE, SYS, etc. Use all uppercase letters.
ver_id This ID must be unique, not change, and is case-sensitive. The format used is the wallet's configuration file name (without the extension), followed by a double-hyphen, then the initial wallet version added to this compatibility versioning group: blocknetdx--v3.9.16, dogecoin--v1.10.0-dogeparty, syscoin--3.0.5.0, etc.
ver_name User viewable and user friendly name for the blockchain version group. This can be changed/renamed and is used to indicate the blockchain versioning group. For example, Blocknet's current ver_name is Blocknet v3.9.16+. If a new version group was created for the next waller version release, the ver_name could be changed to Blocknet v3.9.16-v3.9.22.
conf_name The name of the wallet's configuration file (with the extension): blocknetdx.conf, dogecoin.conf, syscoin.conf, etc. This is case-sensitive and should be written exactly as it is in the file name.
dir_name_linux This is the name of the blockchain's folder in the data directory: blocknetdx, dogecoin, syscoincore, etc. This is case-sensitive and should be written exactly as it is in the folder name.
dir_name_mac This is the name of the blockchain's folder in the data directory: BlocknetDX, Dogecoin, SyscoinCore, etc. This is case-sensitive and should be written exactly as it is in the folder name.
dir_name_win This is the name of the blockchain's folder in the data directory: BlocknetDX, Dogecoin, SyscoinCore, etc. This is case-sensitive and should be written exactly as it is in the folder name.
repo_url This is the URL of the wallet’s Github repository: https://github.com/BlocknetDX/BlockDX, https://github.com/dogecoin/dogecoin, https://github.com/syscoin/syscoin, etc. Do not include trailing slashes.
versions This is an array of wallet versions compatible with the referenced xbridge_conf and wallet_conf configuration files. The versioning used is case-sensitive and must be exactly the same as tagged in the Github repo for each release: v3.9.16 (Blocknet), v1.10.0-dogeparty (Dogecoin), 3.0.5.0 (Syscoin), etc.
xbridge_conf This is the name of the XBridge configuration file within the xbridge-confs folder. The title of this file should be the same as the ver_id.
wallet_conf This is the name of the wallet configuration file within the wallet-confs folder. The title of this file should be the same as the ver_id.

Example Manifest Object

{
    "blockchain": "Blocknet",
    "ticker": "BLOCK",
    "ver_id": "blocknetdx--v3.9.16",
    "ver_name": "Blocknet v3.9.16+",
    "conf_name": "blocknetdx.conf",
    "dir_name_linux": "blocknetdx",
    "dir_name_mac": "BlocknetDX",
    "dir_name_win": "BlocknetDX",
    "repo_url": "https://github.com/BlocknetDX/BlockDX",
    "versions": [
      "v3.9.16",
      "v3.9.20",
      "v3.9.22"
    ],
    "xbridge_conf": "blocknetdx--v3.9.16.conf",
    "wallet_conf": "blocknetdx--v3.9.16.conf"
}

XBridge Configuration Files

The XBridge configuration files are versioned for each blockchain using the manifest file as a key. The format of each file is as follows:

[TICKER]                        # Ticker used to represent the blockchain on exchanges;
Title=                          # Name of the blockchain with spaces removed;
Address=                        # Retired legacy setting, can be left blank;
Ip=127.0.0.1                    # Client IP, localhost or IP of machine(VM/VPS);
Port=                           # Wallet RPC port listed in the wallet conf;
Username=                       # Wallet RPC username created in the wallet conf;
Password=                       # Wallet RPC password created in the wallet conf;
AddressPrefix=                  # Decoded public address, Base58 > HEX(0,2) > decimal;
ScriptPrefix=                   # Decoded P2SH address, Base58 > HEX(0,2) > decimal;
SecretPrefix=                   # Decoded private key, Base58 > HEX(0,2) > decimal;
COIN=                           # Coin precision defined in source code COIN =;
MinimumAmount=0                 # Minimum exchange amount, leave value set to '0';
TxVersion=                      # The `version` value found in raw transactions;
DustAmount=0                    # Leave value set to '0';
CreateTxMethod=                 # Type of transaction method: BTC, SYS, DGB, etc;
GetNewKeySupported=true         # Leave value set to 'true';
ImportWithNoScanSupported=true  # Leave value set to 'true';
MinTxFee=0                      # Leave value set to '0', adjust fee in 'FeePerByte';
BlockTime=                      # The blockchain's block time in seconds;
FeePerByte=                     # The fee per byte to send a transaction;
Confirmations=0                 # Number of confirmations to complete exchange;

Example XBridge File

File Name: blocknetdx--v3.9.16.conf

[BLOCK]
Title=Blocknet
Address=
Ip=127.0.0.1
Port=41414
Username=Blockhead
Password=fa506e4a01a7
AddressPrefix=26
ScriptPrefix=28
SecretPrefix=154
COIN=100000000
MinimumAmount=0
TxVersion=1
DustAmount=0
CreateTxMethod=BTC
GetNewKeySupported=true
ImportWithNoScanSupported=true
MinTxFee=0
BlockTime=60
FeePerByte=20
Confirmations=0

The file name should match the value of the manifest file's xbridge_conf key for the version group that these XBridge values pertain to.

Wallet Configuration Files

The wallet configuration files are versioned for each blockchain using the manifest-latest.json file as a key. The format of each file is as follows:

server=1                        # Enable/disable command line and JSON-RPC commands;
listen=1                        # Enable/disable peer connections;
rpcuser=                        # Custom username, must match in xbridge.conf;
rpcpassword=                    # Custom password, must match in xbridge.conf;
rpcallowip=127.0.0.1            # Client IP, localhost or IP of machine(VM/VPS);
port=                           # Port to listen for connections on;
rpcport=                        # Port to listen for JSON-RPC connections on;
addresstype=legacy              # Remove if not a Segwit supported blockchain;
changetype=legacy               # Remove if not a Segwit supported blockchain;

Example Wallet File

File Name: blocknetdx--v3.9.16.conf

listen=1
server=1
rpcallowip=127.0.0.1
rpcuser=Blockhead
rpcpassword=fa506e4a01a7
port=41412
rpcport=41414

The file name should match the value of the manifest file's wallet_conf key for the version group that these XBridge values pertain to.

Creating Configuration Files

The below sections explain the process to for creating an XBridge and wallet configuration files from scratch.

Creating an XBridge File

In this explanation, Blocknet wallet v3.9.22 will be used as an example throughout the process of creating an XBridge configuration file. The name this file is saved as should be the same as the ver_id of the original manifest version group it was created for. Blocknet example: "ver_id": "blocknetdx--v3.9.16" yields blocknetdx--v3.9.16.conf;

Setting Procedure
[TICKER] --> [BLOCK] The ticker is the abbreviation used to represent a blockchain on exchanges. This can be easily discovered by visiting any of the exchanges that list Blocknet, such as Bittrex. Here the ticker can be seen as BLOCK. This is used in the head of the file as [BLOCK].
Title=Blocknet The title is the name of the blockchain with the spaces removed. For Blocknet it's simply Blocknet.
Address= This address setting is not currently used and can be left blank.
IP=127.0.0.1 This is the IP of the client wallet. Default should be set to 127.0.0.1 and if needed, can be changed by the end user when setting up the configuration files for the given environment.
Port=41414 This is the RPC port for the wallet and must be the same value as rpcport in the wallet configuration file. Most Qt wallets will list a default suggested RPC port under Help > Command-line options > Server Options. In here will be a line similar to the following:
Listen for JSON-RPC connections on <port> (default: 41414 or testnet: 41419)
As shown, the RPC port is 41414. If this port is used by another blockchain, an arbitrary available port may be used.
Username= This should be left blank and filled out by the end user.
Password= This should be left blank and filled out by the end user.
AddressPrefix=26 There are multiple steps to obtain the address prefix:
1) Copy a public address, ie: BUE65eaeh3NZwNm2p5yKSstxteYvShi4yu;
2) Visit this online Base58 tool: lenschulwitz.com;
3) Paste the address in the Bitcoin Address Base58 Decoder input and decode the address to a HEX string: 1A04CDFFBA976B79C0D25F06C56151FEF6A2A3156BD60F2398;
4) Copy the first 2 characters of the HEX string: 1A;
5) Visit this online HEX converter tool: binaryhexconverter.com;
6) Paste the 2 characters in the HEX value input and convert it to decimal value: 26;
7) The address prefix is 26;
ScriptPrefix=28 The script prefix follows the same process as the address prefix, but with a P2SH public address instead of a regular public address. Follow these steps to obtain the P2SH public address and prefix:
1) Open the wallet's debug console;
2) Type validateaddress <pub address>, replacing <pub address> with a public address, and press Enter;
3) From the JSON output, copy the value of "pubkey";
4) In the console type decodescript <pubkey output>, replacing <pubkey output> with the value copied in the previous step, and press Enter;
5) From the JSON output, copy the value of "p2sh", which is the P2SH public address;
6) Perform the steps provided for AddressPrefix using this P2SH public address;
SecretPrefix=154 The secret prefix follows the same process as the address prefix also, but with a private key instead of a public address. Follow these steps to obtain the private key and prefix:
1) Open the wallet's debug console;
2) Type dumpprivkey <pub address>, replacing <pub address> with a public address, and press Enter;
3) Copy the console output, which is the private key;
4) Perform the steps provided for AddressPrefix using this private key;
COIN=100000000 Coin precision determined in source code. COIN=100000000 = 1.00000000 & COIN=1000000 = 1.000000
MinimumAmount=0 This is the minimum exchange amount. Keep this value set to 0.
TxVersion=1 The transaction version is the value of "version" in raw transactions. There are two ways this value can be found.
Method 1:
1) Check if the blockchain explorer has raw transaction JSON in the transaction detail pages. For Blocknet, this can be found in the explorer Raw Transaction tab.
2) In the JSON, the version can be found as the second key-value pair: "version": 1.
Method 2
1) Alternatively, the transaction version number can be found using a wallet's debug console.
2) Open the wallet's debug console;
• Type getrawtransaction <tx id>, replacing <tx id> with a transaction ID(hash): 060f838a8df0e089350834c1ef541418f2f9e1bca952bdcc0f4dbe64af2188c6;
3) Copy the console output, which is a HEX string that needs to be decoded;
4) In the console type decoderawtransaction <hex string>, replacing <hex string> with the outputted HEX string;
5) In the JSON output, the version can be found as the second key-value pair: "version": 1.
DustAmount=0 This specifies the dust amount threshold. Keep this value set to 0.
CreateTxMethod=BTC The transaction method refers to the type of transaction procedure that is used for the blockchain. The different types can be found by looking at the variations of xbridgewalletconnector files in the Blocknet Github, such as BTC, DGB, or SYS. Example: xbridgewalletconnectordgb.cpp;
GetNewKeySupported=true Keep this value set to true.
ImportWithNoScanSupported=true Keep this value set to true.
MinTxFee=0 This can be used to set a minimum transaction fee, but most of the time it works best to keep this value set to 0 and instead adjust the value of FeePerByte.
BlockTime=60 This is the blockchain's block time in seconds, which is usually readily available. For Blocknet it's 60 seconds. If this is not available then a close estimate can be calculated in two ways:
Method One:
1) Visit the explorer and expand the list to view the last 500 blocks.
2) Record how long ago the time of the 500th block was, or the difference in time between the most recent block and the 500th block. 3) The block time would be the time in seconds divided by 500: BlockTime = (time in seconds)/500;
Method Two:
1) Open the wallet's debug console;
2) Type getmininginfo and press Enter;
3) From the JSON output, copy the values of difficulty and networkhashps;
4) The block time would be 2^32 time the difficulty, divided by the network hashrate: BlockTime = 2^32 * difficulty / networkhashps;
FeePerByte=20 The fee per byte is how much to charge per byte for an exchange. This can be calculated by looking in the wallet send function for the recommended fee per byte and then multiplying it by 2-2.5 since there's 2 transactions that take occur in an exchange: one transaction from one party's address to the P2SH address and then a second transaction from the P2SH address to the counterparty's address.
Confirmations=0 Confirmations is the minimum amount of transaction confirmations required until funds are spent and an exchange is complete. Requiring more confirmations increases the time and exchange take but makes it more secure as the network verifies the data. By default, the number confirmations required is set to 0.

Creating a Wallet File

In this explanation, Blocknet wallet v3.9.22 will be used as an example throughout the process of creating an wallet configuration file. The name this file is saved as should be the same as the ver_id of the original manifest version group it was created for. Blocknet example: "ver_id": "blocknetdx--v3.9.16" yields blocknetdx--v3.9.16.conf;

Setting Procedure
listen=1 Keep this set to 1 as is enables command line and JSON-RPC commands.
server=1 Keep this set to 1 as it enables peer connections.
rpcallowip=127.0.0.1 This is the IP of the client wallet. Default should be set to 127.0.0.1 and if needed, can be changed by the end user when setting up the configuration files for the given environment.
rpcuser= This should be left blank and filled out by the end user.
rpcpassword= This should be left blank and filled out by the end user.
port=41412 his is the port that peers connect to for the wallet. Most Qt wallets will list a default suggested port under Help > Command-line options > Connection Options. In here will be a line similar to the following:
Listen for connections on <port> (default: 41412 or testnet: 41474)
As shown, the port is 41412. If this port is used by another blockchain, an arbitrary available port may be used.
rpcport=41414 This is the RPC port for the wallet and must be the same value as Port in the XBridge configuration file. Most Qt wallets will list a default suggested RPC port under Help > Command-line options > Server Options. In here will be a line similar to the following:
Listen for JSON-RPC connections on <port> (default: 41414 or testnet: 41419)
As shown, the RPC port is 41414. If this port is used by another blockchain, an arbitrary available port may be used.

Additional Note

Blocknet does not require addresstype= or changetype=, nor does any other blockchain that does not support Segwit. If the blockchain does support Segwit, then simply add the following to the end of the file:

addresstype=legacy
changetype=legacy

The reason this is needed is that with Segwit, the public address generated has the same prefix as the P2SH address prefix, which causes issues. Setting the values as legacy specifies that only legacy(non Segwit) addresses should be used.

File Comments

When adding comments to a configuration file, there are some conventions to use:

  • Comment format:
    # This is a comment. It starts with a pound key(#), followed by a space, then the comment.
  • Comments should be on a new line;
  • If is is a general comment about the file, the comment should be at the top of the file with a newline beneath it;
  • If the comment is about a specific line, use a newline before the comment as well as after the line(s) the comment is in reference to.

Correct Format Example:

# This would be a general comment about the file

server=1
listen=1
rpcuser=
rpcpassword=
rpcallowip=127.0.0.1
enableaccounts=1
staking=0

# This comment is about the ports
port=3777
rpcport=3776

addresstype=legacy
changetype=legacy

Incorrect Format Example:

# General comment about the file that should have a newline after
server=1
listen=1

# Comment just for rpcuser, should be a newline after rpcuser
rpcuser=
rpcpassword=
rpcallowip=127.0.0.1    # This comment should be on a new line
enableaccounts=1
staking=0
# This comment is about the ports, should have a newline above
port=3777
rpcport=3776

addresstype=legacy
changetype=legacy
# Another general comment about the file that should be at the top of the file

Setup Configuration Files

The XBridge and wallet configuration files in this repo are named and organized for versioning. In order to properly set up an environment for use with the Blocknet Protocol's XBridge component, additional steps must be taken.

Setup xbridge.conf

The xbridge.conf is a single file includes a main heading, followed by a newline, followed by the contents of all the individual XBridge configuration file of any blockchain being used with each one separated by a newline.

Heading Format:

[MAIN]
ExchangeWallets=
  • The heading must be at the top of the file.
  • The leading line [MAIN] does not change.
  • The ExchangeWallets= setting is used to list the blockchains to be supported. In other words, any blockchain that will be used in an exchange must be listed here. If running a Service Node, only the blockchains that the node will support should be listed here. The values taken are the blockchain [TICKER] values from the individual XBridge configuration file.

Heading Example:

[MAIN]
ExchangeWallets=BTC,SYS,BLOCK,DGB,QTUM,DASH,XZC,BITG,LTC,DOGE,PIVX,XSN,MONA,ZOI,VIA,LBC

After the heading, the contents of the individual XBridge configuration files of the blockchains listed under ExchangeWallets are listed. To find the proper XBridge settings for each blockchain, first find the version group in the manifest file for each blockchain that has the wallet version to be used listed in the "versions" array (if a version is not listed then it is not yet supported). Copy the contents of each file and paste it into the xbridge.conf file. For an example of what a complete and properly formatted xbridge.conf file looks like, take a look at the example-xbridge.conf file in this repo.

Make sure to update the following for each configuration entry:

Setting Procedure
IP=127.0.0.1 This is the IP of the client wallet and must be the same as the value for rpcallowip in the wallet configuration file. In most cases this can be left as localhost 127.0.0.1, but may need an another IP if using a VM, VPS, or some other non local setup.
Username=Blockhead The username is made up and the value must be the same as created in the wallet configuration file.
Password=fa506e4a01a7 The password is made up and the value must be the same as created in the wallet configuration file.

Setup Wallet Files

Each blockchain wallet installation has a configuration file; for Blocknet it is blocknetdx.conf. These contents are to be replaced by the contents of the wallet configuration file referenced in the respective manifest-latest.json version group. To find the proper wallet configuration for each blockchain, first find the version group in the manifest-latest.json file for each blockchain that has the wallet version to be used listed in the "versions" array (if a version is not listed then it is not yet supported). Copy the contents of each referenced wallet configuration file and paste it into the configuration file of the downloaded wallet.

Make sure to update the following for each configuration entry:

Setting Procedure
rpcallowip=127.0.0.1 This is the IP of the client wallet and must be the same as the value for IP in the xbridge.conf entry for this blockchain. In most cases this can be left as localhost 127.0.0.1, but may need an another IP if using a VM, VPS, or some other non local setup.
rpcuser=Blockhead The username is made up and the value must be the same as created in the xbridge.conf entry for this blockchain.
rpcpassword=fa506e4a01a7 The password is made up and the value must be the same as created in the xbridge.conf entry for this blockchain.

Testing a Blockchain for Compatibility

To attempt an exchange to test compatibility, the following will be needed:

  • A small amount above dust value of the blockchain's token, Blocknet's token(BLOCK) for the exchange network fee, and token of a compatible blockchain to trade against, which can also be BLOCK. Depending on the token's unit value, $1-3 USD should work fine.
  • Run the full nodes for each of the blockchains being tested on a testnet Service Node with the composed configuration files. Contact a contributor for tBLOCK or see if the chains can be added to existing testnet Service Nodes.
  • Two instances of each blockchain used in testing must be run, with each having the respective configuration files. Exchanges cannot be taken by the client that created them.
  • Make sure debug=1 is set in the blocknetdx.conf file to receive full debug logs if there's an issue.

Once the test environment is ready, create an order and conduct a loop exchange by taking the order that was created with the other set of clients. The exchange will either be successful or present errors in the debug log.

Successful Exchange

If the exchange is successful, a commit should be made to the respective configuration files. There are a few variations of scenarios:

New wallet version, existing blockchain, existing configurations, existing version group:
If a successful exchange was confirmed for a new wallet version using the same xbridge_conf and wallet_conf listed under a single existing manifest version group, then all that is needed is to update that version group versions array with the new wallet version as is listed in the tag of the Github release.

New wallet version, existing blockchain, existing configurations, new version group:
If a new wallet version is successful using xbridge_conf and wallet_conf from two different manifest version groups, then a new version group must be created. This new version group would have this new wallet as the only version listed under versions, as is listed in the tag of the Github release, with a new ver_id, the respective XBridge and wallet configuration files used listed for xbridge_conf and wallet_conf, and any other changes that may be required.

New wallet version, existing blockchain, new configurations, new version group:
If a new wallet version is successful using a newly generated XBridge or wallet configuration file, then a new manifest version group must be created as well as the new configuration file. This new version group would have this new wallet as the only version listed under versions, as is listed in the tag of the Github release, with a new ver_id, the respective XBridge and wallet configuration files used listed for xbridge_conf and wallet_conf, and any other changes that may be required.

New blockchain, new configurations, new version group:
If a successful exchange was confirmed for a new blockchain, then a new manifest version group must be created as well as the new configuration files.

Contributing

Want to help build the internet of blockchains? Check out our contributing documentation.

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