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Your own chain

(CPU) Mining your own chain#

Generating genesisStateDigestHex#

You will need to generate your genesisStateDigestHex, this is a Base16 representation of the genesis state roothash and generated by configuring your chains values in src/main/resources/testnet.conf and then compiling the node.


You will need to have sbt installed, a build tool for Scala.

SDKMAN is the easiest way to get setup with sbt.

curl -s "" | bash 
sdk install sbt

Compiling the node#

sbt assembly

This will create an ergo.jar at /target/scala*/ergo-*.jar

Configuring your .conf file#

Your testnet.conf should look like this at this stage;

ergo {
  networkType = "testnet"

  node {
    mining = true
    offlineGeneration = true
    useExternalMiner = false

  #chain {
  #     genesisStateDigestHex = "Still to be generated at this stage"

scorex {

 network {
    bindAddress = ""
    nodeName = "ergo-testnet-5"
    #knownPeers = []

 restApi {
    # Hex-encoded Blake2b256 hash of an API key. Should be 64-chars long Base16 string.
    # Below is hash corresponding to API_KEY = "hello" (with no quotes)
    apiKeyHash = "324dcf027dd4a30a932c441f365a25e86b173defa4b8e58948253471b81b72cf"

Running the node#

java -jar -Xmx4G ergo-*.jar --testnet -c testnet.conf

The console should return a new genesisStateDigestHex value, place that inbetween the quotation marks and uncomment the lines above.

Restart your node and it will now CPU-mine its own chain!