Invalid genesis file with puppeth and geth

[wbt]

In a simple use of puppeth to generate a genesis block, and then use of geth to read it in, I am getting an error that it's missing required field 'gasLimit' though the field seems to be present in the genesis block.

System information

Geth Version: 1.8.2-stable
Git Commit: b8b9f7f
Architecture: amd64
Protocol Versions: [63 62]
Go Version: go1.9.2
Operating System: Windows 10

Puppeth to create Genesis block

PS> ./puppeth.exe
+-----------------------------------------------------------+
| Welcome to puppeth, your Ethereum private network manager |
|                                                           |
| This tool lets you create a new Ethereum network down to  |
| the genesis block, bootnodes, miners and ethstats servers |
| without the hassle that it would normally entail.         |
|                                                           |
| Puppeth uses SSH to dial in to remote servers, and builds |
| its network components out of Docker containers using the |
| docker-compose toolset.                                   |
+-----------------------------------------------------------+

Please specify a network name to administer (no spaces or hyphens, please)
> bugdemo

Sweet, you can set this via --network=bugdemo next time!

INFO [03-14|12:22:31] Administering Ethereum network           name=bugdemo
WARN [03-14|12:22:31] No previous configurations found         path=.puppeth\\bugdemo

What would you like to do? (default = stats)
 1. Show network stats
 2. Configure new genesis
 3. Track new remote server
 4. Deploy network components
> 2

Which consensus engine to use? (default = clique)
 1. Ethash - proof-of-work
 2. Clique - proof-of-authority
> 1

Which accounts should be pre-funded? (advisable at least one)
> 0x5AEDA56215b167893e80B4fE645BA6d5Bab767DE
> 0x

Specify your chain/network ID if you want an explicit one (default = random)
>
INFO [03-14|12:23:21] Configured new genesis block

What would you like to do? (default = stats)
 1. Show network stats
 2. Manage existing genesis
 3. Track new remote server
 4. Deploy network components

Contents of Genesis block file

For brevity, I have omitted most of accounts 00...FF which each have a 1 Wei balance in the genesis block file produced by puppeth (I don't fully understand why, but that seems to be an unrelated issue). Otherwise, this is the block file verbatim.

{
  "genesis": {
    "config": {
      "chainId": 24965,
      "homesteadBlock": 1,
      "eip150Block": 2,
      "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
      "eip155Block": 3,
      "eip158Block": 3,
      "byzantiumBlock": 4,
      "ethash": {}
    },
    "nonce": "0x0",
    "timestamp": "0x5aa94c4f",
    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "gasLimit": "0x47b760",
    "difficulty": "0x80000",
    "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "coinbase": "0x0000000000000000000000000000000000000000",
    "alloc": {
      "0000000000000000000000000000000000000000": {
        "balance": "0x1"
      },
      "00000000000000000000000000000000000000ff": {
        "balance": "0x1"
      },
      "5aeda56215b167893e80b4fe645ba6d5bab767de": {
        "balance": "0x200000000000000000000000000000000000000000000000000000000000000"
      }
    },
    "number": "0x0",
    "gasUsed": "0x0",
    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
  }
}

Note the line "gasLimit": "0x47b760", which looks as present as any other.

Attempts to Run: Actual Behavior

PS> mkdir ./data/bugdemo
PS> ./geth.exe --datadir data/bugdemo init .puppeth/bugdemo
Fatal: invalid genesis file: missing required field 'gasLimit' for Genesis

(Output of mkdir omitted but successful).
For comparison:

PS> ./geth.exe --datadir data/bugdemo init .puppeth/nofile
Fatal: Failed to read genesis file: open .puppeth/nofile: The system cannot find the file specified.

Expected behaviour

I expected the init to complete successfully and not report 'gasLimit' was missing, as it seems to be there in the JSON.

[CJHackerz]

Same issue I having

[gueux]

It looks like puppeth generate one useless level of JSON object:
{ "genesis": {} }

Try to omit "genesis" section as in official example of genesis block:
https://github.com/ethereum/go-ethereum/wiki/Private-network

[fgimenez]

@wbt I think you should not use ~/.pupppeth/bugdemo as the genesis file, when you get to the last step in the issue description you should actually export the genesis configuration to a file:

What would you like to do? (default = stats)
 1. Show network stats
 2. Manage existing genesis
 3. Track new remote server
 4. Deploy network components
> 2

 1. Modify existing fork rules
 2. Export genesis configuration
 3. Remove genesis configuration
> 2

Which file to save the genesis into? (default = bugdemo.json)
> 
INFO [04-05|17:02:23] Exported existing genesis block 

In my case that gives a proper genesis file:

$ cat ./bugdemo.json
{
  "config": {
    "chainId": 47279,
    "homesteadBlock": 1,
    "eip150Block": 2,
    "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "eip155Block": 3,
    "eip158Block": 3,
[.......]

Hope this helps.

[ghost]

Меня беся ваши папеты как и вы

…

On Thu, 5 Apr 2018 21:10 Federico Gimenez, ***@***.***> wrote: @wbt <https://github.com/wbt> I think you should not use ~/.pupppeth/bugdemo as the genesis file, when you get to the last step in the issue description you should actually export the genesis configuration to a file: What would you like to do? (default = stats) 1. Show network stats 2. Manage existing genesis 3. Track new remote server 4. Deploy network components > 2 1. Modify existing fork rules 2. Export genesis configuration 3. Remove genesis configuration > 2 Which file to save the genesis into? (default = bugdemo.json) > INFO [04-05|17:02:23] Exported existing genesis block In my case that gives a proper genesis file: $ cat ./bugdemo.json { "config": { "chainId": 47279, "homesteadBlock": 1, "eip150Block": 2, "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000", "eip155Block": 3, "eip158Block": 3, [.......] Hope this helps. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#16317 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Ac3rNUj1NPYXdbspVsJreQ6T3DOocM3yks5tljP0gaJpZM4Sq-k1> .

[holiman]

Yup, @fgimenez is correct, use the exported genesis instead