Latest posts of: natecv8

Hi John,

Thanks for all your work on ABE, it's a great piece of software. I have loaded in a few blockchains now, but there's one in particular I am having issues with and I see some strange behaviour that I haven't been able to understand. I am trying to load in the Datacoin blockchain which is a primecoin based chain with additional data structures for storing data in the blockchain.

I understand Abe won't be able to parse the data component which I am going to do separately with Datacoin tools, I am looking to import the transaction information via RPC however ABE is making a strange RPC call that the daemon doesn't like causing it to fail.

I have defined the coin details in abe.conf and specified the genesis block transaction:

Code:

import-tx += 01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff350002e7033068747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3332353733352e30ffffffff0100e1f50500000000000000000000

datadir += [{
        "dirname": "/usr/src/dev/bitcoin/blockchain/datacoin/",
        "chain": "Datacoin",
        "code3": "DTC",
        "address_version": "\u001e",
        "loader": "rpc",
        "conf": "/usr/src/dev/bitcoin/blockchain/datacoin/datacoin.conf"
      }]

However when I run abe, it throws an error from the RPC call to get the next block:

Code:

python -m Abe.abe --config abe.conf

Falling back to default (Bitcoin) policy.
RPC failed: ('http protocol error', 0, 'got a bad status line', None)
Failed to catch up {'blkfile_offset': 0, 'blkfile_number': 1, 'chain_id': 11, 'loader': u'rpc', 'conf': u'/usr/src/dev/bitcoin/blockchain/datacoin/datacoin.conf', 'dirname': u'/usr/src/dev/bitcoin/blockchain/datacoin/', 'id': 18L}
Traceback (most recent call last):
  File "Abe/DataStore.py", line 2511, in catch_up
    raise Exception("RPC load failed")
Exception: RPC load failed

I did a tcpdump of the RPC request and I can see that for some reason, Abe is requesting block height 'x' which is causing the daemon to immediately drop the connection. The same command from the command line also throws an error:

Code:

POST http://127.0.0.1:11777 HTTP/1.0
Content-Type: application/x-www-form-urlencoded
Content-Length: 70
Authorization: Basic [...]
Host: 127.0.0.1:11777
User-Agent: Python-urllib/1.17

{"params": [0], "jsonrpc": "2.0", "method": "getblockhash", "id": "x"}

Any idea where the x is coming from? I looked all through DataStore.py at where get_blockhash is used and from what I can see it's meant to be requsting block height 0.