create_genesis.py

import json

genesis_path = "./genesis_export.json"
output_genesis = "./genesis_new.json"

def modify_genesis(export_json_path, output_json_path):
    with open(export_json_path, 'r') as f:
        export_data = json.load(f)
    
    # set a new chain id
    export_data['chain_id'] = "uni-420"

    # remove smart contract codes, not sure why but initgenesis fails
    export_data['app_state']['wasm']['codes'] = []
    export_data['app_state']['wasm']['contracts'] = []
    export_data['app_state']['wasm']['sequences'] = []

    # Set all validators to jailed except for kintsugi
    kintsugi_addr = "junovaloper1juczud9nep06t0khghvm643hf9usw45r23gsmr"
    kintsugi_byte_addr = "31E927F677282369B7E57D39FF9C47E3845BFDEA"
    kintsugi_conskey = "junovalcons1x85j0anh9q3kndl905ull8z8uwz9hl02y0n499"

    # replace mainnet pubkey with a new local pubkey
    replace_pubkey = "fscxRe/wWtcPp07H4WfiH89kQYEYBYTjRJi2TbhX+Lk="
    replace_byte_addr = "0FAF0893503B86A775C12F434BBC17EAD232C03F"
    replace_conskey = "junovalcons1p7hs3y6s8wr2wawp9ap5h0qhatfr9spl8qyt2s"

    kintval = {}
    new_total_vp = ""
    for val in export_data['validators']:
        if val['address'] == kintsugi_byte_addr:
            val['pub_key']['value'] = replace_pubkey
            val['address'] = replace_byte_addr
            kintval = val
            new_total_vp = val['power']
            break
    
    # remove all validators except kintsugi
    export_data['validators'] = [kintval]

    # replace pubkey and set all validators to jailed except mine
    for val in export_data['app_state']['staking']['validators']:
        if val['operator_address'] == kintsugi_addr:
            val['consensus_pubkey']['key'] = replace_pubkey
        else:
            val['jailed'] = True         

    # set total vp to the new total vp
    export_data['app_state']['staking']['last_total_power'] = new_total_vp

    # remove all validators last powers except mine
    kintlastpower = {}
    for valvp in export_data['app_state']['staking']['last_validator_powers']:
        if valvp['address'] == kintsugi_addr:   
            kintlastpower = valvp
            break
    
    export_data['app_state']['staking']['last_validator_powers'] = [kintlastpower]

    # reset gov params
    export_data['app_state']['gov']['params']['voting_period'] = "300s"
    export_data['app_state']['gov']['params']['quorum'] = "0.001000000000000000"
    
    # Convert the JSON data to a string
    export_data_str = json.dumps(export_data)
    
    # Replace all occurrences of kintsugi_conskey with replace_conskey
    export_data_str = export_data_str.replace(kintsugi_conskey, replace_conskey)
    
    # Convert the string back to JSON
    modified_data = json.loads(export_data_str)
    
    # Save the modified clean genesis file
    with open(output_json_path, 'w') as f:
        json.dump(modified_data, f, indent=2)
        
    print(f"Modified genesis file saved to {output_json_path}")

modify_genesis(genesis_path, output_genesis);