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as a non-block producer, how do I know I'm uploading a transaction to the true eos blockchain and not an impersonator? What methods exist to verify that? Example: websites use certificates.

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There is a chain ID for each chain that is unique. You can retrieve this with the get info API/cleos call.

You also enter this if you're say loading a new network into scatter.

cleos --url <API ENDPOINT HERE> get info

http://127.0.0.1:8888/v1/chain/get_info

This is the main net:

{
  "server_version": "2fc5d1cb",
  "chain_id": "aca376f206b8fc25a6ed44dbdc66547c36c6c33e3a119ffbeaef943642f0e906",
  "head_block_num": 35934160,
  "last_irreversible_block_num": 35933831,
  "last_irreversible_block_id": "02244e87d51eefbce234da2f8238e8df20aff331bc9c66081e3d7b702bb7f178",
  "head_block_id": "02244fd02601f1067306775c02c4ec4ae8fb796ad375af66cdaa86cc6dcc048d",
  "head_block_time": "2019-01-06T02:06:51.500",
  "head_block_producer": "cochainworld",
  "virtual_block_cpu_limit": 34468896,
  "virtual_block_net_limit": 1048576000,
  "block_cpu_limit": 176723,
  "block_net_limit": 1045864,
  "server_version_string": "mainnet-1.5.0-dirty"
}
  • so that's a digital signature? Who has the private key to sign? – mar233 Jan 6 at 4:34
  • 1
    @mar233 chain_id is just a hash value of eosio::genesis_state. – conr2d Jan 7 at 6:22

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