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How do I retrieve the genesis block for my chain?

The genesis block for a Kaleido chain can be retrieved locally by invoking the /genesis API. The block contains environmental configuration data such as EIP implementations, block period, target gas limit, etc…

To retrieve the block use the GET method against the /genesis endpoint, with the consortia and environment IDs specified in the path. For example:

curl -X GET -H 'Authorization: Bearer {APIKEY}' -H 'Content-Type: application/json' https://console.kaleido.io/api/v1/consortia/{consortia_id}/environments/{environment_id}/genesis | jq

If your environment’s home region is outside of the US, update the baseline URL accordingly. For example:

  • EU Frankfurt – https://console-eu.kaleido.io/api/v1
  • APAC Sydney – https://console-ap.kaleido.io/api/v1
  • APAC Seoul – https://console-ko.kaleido.io/api/v1

A successful call will return a parsed block, optionally displayed as a JSON object if you leverage jq. The following is the genesis block for a Geth clique PoA created against a 1.0.10 versioned environment:

  "alloc": {
    "62a338f7c9e30c1b9cef3312107fdcfd173afaa0": {
      "balance": "1000000000000000000000000000"
  "coinbase": "0x0000000000000000000000000000000000000000",
  "config": {
    "homesteadBlock": 1,
    "eip150Block": 2,
    "eip155Block": 3,
    "eip158Block": 3,
    "byzantiumBlock": 4,
    "clique": {
      "period": 5,
      "epoch": 30000
    "chainId": 589523943
  "difficulty": "0x1",
  "extraData": "0x000000000000000000000000000000000000000000000000000000000000000062a338f7c9e30c1b9cef3312107fdcfd173afaa00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  "gasLimit": "0x2FEFD800",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "nonce": "0x0",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp": "0x00"

Refer to the API Documentation for the full specification.