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Dash Core provides several network options designed to let developers test their applications with reduced risks and limitations.
When run with no arguments, all Dash Core programs default to Dash's main network (mainnet). However, for development, it's safer and cheaper to use Dash's test network (testnet) where the duffs spent have no real-world value. Testnet also relaxes some restrictions (such as standard transaction checks) so you can test functions which might currently be disabled by default on mainnet.
To use testnet, use the argument
dash-qt or add
testnet=1 to your
dash.conf file as described earlier. To get free duffs for testing, check the faucets listed below. Some are community supported and due to potentially frequent Testnet changes, one or more of them may be unavailable at a given time:
Testnet is a public resource provided for free by Dash Core Group and members of the community, so please don't abuse it.
For situations where interaction with random peers and blocks is unnecessary or unwanted, Dash Core's regression test mode (regtest mode) lets you instantly create a brand-new private block chain with the same basic rules as testnet---but one major difference: you choose when to create new blocks, so you have complete control over the environment.
Many developers consider regtest mode the preferred way to develop new applications. The following example will let you create a regtest environment after you first configure dashd.
> dashd -regtest -daemon Dash Core server starting
dashd in regtest mode to create a private block chain.
## Dash Core dash-cli -regtest generate 101
Generate 101 blocks using a special RPC which is only available in regtest mode. This takes less than a second on a generic PC. Because this is a new block chain using Dash's default rules, the first blocks pay a block reward of 500 dash. Unlike mainnet, in regtest mode only the first 150 blocks pay a reward of 500 dash. However, a block must have 100 confirmations before that reward can be spent, so we generate 101 blocks to get access to the coinbase transaction from block #1.
dash-cli -regtest getbalance 500.00000000
Verify that we now have 500 dash available to spend.
You can now use Dash Core RPCs prefixed with
Regtest wallets and block chain state (chainstate) are saved in the
regtest subdirectory of the Dash Core configuration directory. You can safely delete the
regtest subdirectory and restart Dash Core to start a new regtest. (See the Developer Examples Introduction for default configuration directory locations on various operating systems. Always back up mainnet wallets before performing dangerous operations such as deleting.)
The complete set of regtest-specific arguments can be found on the
dashd Arguments and Commands page.
Developer networks (devnets) have some aspects of testnet and some aspects of regtest. Unlike testnet, multiple independent devnets can be created and coexist without interference. Devnets can consist of nodes running on the same computer, on a small private network, or distributed across the internet.
Each devnet is identified by a name which is hardened into a "devnet genesis" block that is automatically positioned at height 1. Validation rules ensure that a node from
devnet=test1 will not accept blocks from
devnet=test2. This is done by checking the expected devnet genesis block. Also, the devnet name is put into the sub-version field of the
version message. If a node connects to the wrong network, it will immediately be disconnected.
The genesis block of the devnet is the same as the one from regtest. This starts the devnet with a very low difficulty, allowing quick generation of a sufficient balance to create a masternode.
To use devnet, use the argument
dash-qt or add
devnet=<name> to your
dash.conf file as described earlier.
Devnets must be assigned both
-rpcport unless they are not listening (
-listen=0). It is possible to run a devnet on a private (RFC1918) network by using the
Example devnet start command:
> dashd -devnet=mydevnet -rpcport=18998 -port=18999 -daemon Dash Core server starting
Devnets can use 3 devnet-specific options to enable quickly mining large amounts of Dash. This enables quick establishment of test masternodes, etc. The following
dash.conf excerpt shows these configuration options in use:
# First 1000 blocks mined with the lowest difficulty (like regtest) # and first 500 blocks mined with a block subsidity multiplied by 10 # This allows immediate MN registration (DIP3 activates on block 2) minimumdifficultyblocks=1000 highsubsidyblocks=500 highsubsidyfactor=10
The complete set of devnet-specific arguments can be found on the
dashd Arguments and Commands page.
Devnet wallets and block chain state (chainstate) are saved in the
devnet-<name> subdirectory of the Dash Core configuration directory. You can safely delete the
devnet-<name> subdirectory and restart Dash Core to start a new devnet. (See the Developer Examples Introduction for default configuration directory locations on various operating systems. Always back up mainnet wallets before performing dangerous operations such as deleting.)
An old devnet can be easily dropped and a new one started just by destroying all nodes and recreating them with a new devnet name. This works best in combination with an automated deployment using something like Ansible and Terraform. The Dash Network Deploy tool provides a way to do this.
Network type comparison
Each network type has some unique characteristics to support development and testing. The tables below summarize some of the significant differences between the 4 network types.
To enable or disable sporks on a regtest or devnet, set
dash.confconfig file. Any valid Dash address / private key can be used. You can get an address using the
getnewaddressRPC and retrieve its private key using the
|Network Type||Difficulty adjustment algorithm|
|Testnet||Mainnet algorithm, but allows minimum difficulty blocks if no blocks are created for 5 minutes|
|Regtest||Mines blocks at the minimum difficulty level|
|Devnet||Mainnet algorithm after 4001 blocks unless overridden by devnet-specific options|
See chainparams.cpp for details on other differences
Updated 25 days ago