Como forjar revelar operação por rpc

eu segui este artigo Para construir a operação. Mas quandotento construir uma operação de revelação,ela semprefalhou.

params:

 {
    "contents": [
        {
            "kind": "reveal",
            "source": "tz1buwfQ3j7gTSM5QU8bmG2YnfH8zEnsjm92",
            "fee": "1000000",
            "counter": "540140",
            "gas_limit": "100000",
            "storage_limit": "100000",
            "phk": "edpkvJ4LqnbAVXoK12Q1HFuP42UTWcfJtixgKVimCEeStCZwi91x9B"
        }
    ],
    "branch": "BM42s1GKSg6zSyNunMWEiix6weFcynCCUS3QwJ246hvb81uSCCW"
}
 

Resposta:

 Failed to parse the request body: No case matched:
  At /kind, unexpected string instead of endorsement
  At /kind, unexpected string instead of seed_nonce_revelation
  At /kind, unexpected string instead of double_endorsement_evidence
  At /kind, unexpected string instead of double_baking_evidence
  At /kind, unexpected string instead of activate_account
  At /kind, unexpected string instead of proposals
  At /kind, unexpected string instead of ballot
  Missing object field public_key
  At /kind, unexpected string instead of transaction
  At /kind, unexpected string instead of origination
  At /kind, unexpected string instead of delegation
 

e minhafontee phkestão corretos.

I followed this article to construct operation. But when I try to construct a reveal operation, it always failed.

params:

{
    "contents": [
        {
            "kind": "reveal",
            "source": "tz1buwfQ3j7gTSM5QU8bmG2YnfH8zEnsjm92",
            "fee": "1000000",
            "counter": "540140",
            "gas_limit": "100000",
            "storage_limit": "100000",
            "phk": "edpkvJ4LqnbAVXoK12Q1HFuP42UTWcfJtixgKVimCEeStCZwi91x9B"
        }
    ],
    "branch": "BM42s1GKSg6zSyNunMWEiix6weFcynCCUS3QwJ246hvb81uSCCW"
}

response:

Failed to parse the request body: No case matched:
  At /kind, unexpected string instead of endorsement
  At /kind, unexpected string instead of seed_nonce_revelation
  At /kind, unexpected string instead of double_endorsement_evidence
  At /kind, unexpected string instead of double_baking_evidence
  At /kind, unexpected string instead of activate_account
  At /kind, unexpected string instead of proposals
  At /kind, unexpected string instead of ballot
  Missing object field public_key
  At /kind, unexpected string instead of transaction
  At /kind, unexpected string instead of origination
  At /kind, unexpected string instead of delegation

and my source and phk is correct.