Create a Blockchain
Learn how to create a Subnet and a blockchain record on the P-Chain by issuing the CreateSubnetTx and CreateChainTx transactions using the Builder Tooling.
Now that you have Core wallet set up and some AVAX on the P-Chain you can create a Subnet. You will
do this by issuing a CreateSubnetTx transaction. This will create a Subnet that is uniquely
identified by the transaction hash of the CreateSubnetTx transaction.
The CreateSubnetTx transaction only has a single parameter: The owner of the Subnet. The owner can
add blockchains to the Subnet and convert it to an L1. With the conversion to an L1 the owner will lose its
privileges. Therefore, the owner is only relevant during the creation time and does not have to be
secured by a multi-sig if an immediate conversion to an L1 is planned. We will just use your P-Chain
address as the owner.
Click Create Subnet below to issue the CreateSubnetTx transaction:
Checking requirements...
Next you will issue the CreateChainTx on the P-Chain to create the blockchain record. The
CreateChainTx transaction has the following parameters:
name: The name of the chainsubnetID: The ID of the Subnet you want to add the chain tovmID: The ID of the Virtual Machine that will be used to run the chain.genesisData: The genesis configuration of the chain
The tool below will use the Subnet you just created. Give your chain a name (or keep the suggested one) and leave the Virtual Machine set to Subnet EVM.
The Genesis Builder tool allows us to configure many aspects of the blockchain like permissioning, its tokenomics and the transaction fee mechanism. Feel free to browse through the different configuration options, but for now don't change any of the defaults.
Finally, click Create Chain. This will create the P-Chain record for your blockchain and associate it
with the Subnet created in the step above.
The blockchain will be uniquely identified by the transaction hash of the CreateChainTx transaction.
If Core shows an "internal error" when you click Create Chain right after creating your Subnet,
the Subnet may not have been indexed yet. Wait a minute and try again.
Checking requirements...
Congratulations! You have successfully created a blockchain record on the P-Chain. The blockchain does not have any validator nodes yet, so we can't connect our wallet to it or issue any transactions just yet. You will learn how to do that in the next section.
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