Example genesis.json for an Ethereum blockchain

genesis.json

{
  "config": {
    "chainId": 33,
    "homesteadBlock": 0,
    "eip155Block": 0,
    "eip158Block": 0
  },
  "nonce": "0x0000000000000033",
  "timestamp": "0x0",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "gasLimit": "0x8000000",
  "difficulty": "0x100",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "coinbase": "0x3333333333333333333333333333333333333333",
  "alloc": {}
}

What is the meanng of all theses terms

Does anyone know where I can find the docs for the definitions of each property. Is there a genesis.json API doc?

Dear colleagues, terribly sorry to ask if I can use the same as above values in sample file?

Hi Guys, this link clearly explains about the genesis.json file.
https://gist.github.com/0mkara/b953cc2585b18ee098cd

You may also want to consider using byzantiumBlock in the config definition for some of the newer compilers.
see - ethereum/go-ethereum#16931

Thanks for sharing!

Thanks for sharing

Sorry to bother but I got a message when using this json file:
Fatal: Failed to write genesis block: unsupported fork ordering: eip150Block not enabled, but eip155Block enabled at 0
Could you please update this gist?

Sorry to bother but I got a message when using this json file:
Fatal: Failed to write genesis block: unsupported fork ordering: eip150Block not enabled, but eip155Block enabled at 0
Could you please update this gist?

Simply remove these 3 lines
Line 4,5,6

"homesteadBlock": 0,
"eip155Block": 0, 

"eip158Block": 0

Does anyone know where I can find the docs for the definitions of each property. Is there a genesis.json API doc?

just search them on internet and you are good to go.

Thanks for sharing

how to download this file?

It is Possible to Copy and Paste the Code in a File Named genesis-block.json and then Place it in the Folder where you will Initialise, Probably Geth, to Start

пасыба брат

Gitbashhere

json

def extract_genesis_data(filepath):
with open(filepath, 'r') as file:
data = json.load(file)

# استخراج التوكنات
tokens = data.get("app_state", {}).get("tokens", [])
print("🪙 Tokens:")
for token in tokens:
    print(f"- Name: {token['name']}")
    print(f"  Symbol: {token['symbol']}")
    print(f"  Total Supply: {token['total_supply']}")
    print(f"  Owner: {token['owner']}")
    print(f"  Mintable: {token['mintable']}")
    print()

# استخراج العناوين
accounts = data.get("app_state", {}).get("accounts", [])
print("🧾 Addresses:")
for acc in accounts:
    name = acc.get("name", "N/A")
    addr = acc.get("address")
    is_validator = "✅" if acc.get("consensus_addr") else "❌"
    print(f"- Name: {name}, Address: {addr}, Validator: {is_validator}")

: Binance Chain Native Token
Symbol : BNB
Total Supply (smallest unit) : 20000000000000000
Owner Address : bnb1ultyhpw2p2ktvr68swz56570lgj2rdsadq3ym2
Mintable : False

json

def extract_genesis_data(filepath):
with open(filepath, 'r') as file:
data = json.load(file)

# استخراج التوكنات
tokens = data.get("app_state", {}).get("tokens", [])
print("🪙 Tokens:")
for token in tokens:
    print(f"- Name: {token['name']}")
    print(f"  Symbol: {token['symbol']}")
    print(f"  Total Supply: {token['total_supply']}")
    print(f"  Owner: {token['owner']}")
    print(f"  Mintable: {token['mintable']}")
    print()

# استخراج العناوين
accounts = data.get("app_state", {}).get("accounts", [])
print("🧾 Addresses:")
for acc in accounts:
    name = acc.get("name", "N/A")
    addr = acc.get("address")
    is_validator = "✅" if acc.get("consensus_addr") else "❌"
    print(f"- Name: {name}, Address: {addr}, Validator: {is_validator}")

📂 استخدم هذا السطر لتشغيل البرنامج على ملف معين:

extract_genesis_data("genesis.json")