preciousblock

preciousblock "blockhash" Treats a block as if it were received before others with the same work. A later preciousblock call can override the effect of an earlier one. The effects of preciousblock are not retained across restarts. Arguments: 1. blockhash (string, required) the hash of the block to mark as precious Result: null (json null) Examples: > bitcoin-cli preciousblock "blockhash" > curl --user myusername --data-binary '{"jsonrpc": "2.0", "id": "curltest", "method": "preciousblock", "params": ["blockhash"]}' -H 'content-type: application/json' http://127.0.0.1:8332/

Signature

preciousblock(blockhash: string) → any

Code samples

curl --user "$RPC_USER:$RPC_PASS" \
  --data-binary '{"jsonrpc":"1.0","id":"docs","method":"preciousblock","params":["\"<blockhash>\""]}' \
  -H 'content-type: text/plain;' \
  http://127.0.0.1:8332/

bitcoin-cli preciousblock "blockhash"

curl --user myusername --data-binary '{"jsonrpc": "2.0", "id": "curltest", "method": "preciousblock", "params": ["blockhash"]}' -H 'content-type: application/json' http://127.0.0.1:8332/

import requests
r = requests.post(
    "http://127.0.0.1:8332/",
    auth=("$RPC_USER", "$RPC_PASS"),
    json={
        "jsonrpc": "1.0",
        "id": "docs",
        "method": "preciousblock",
        "params": ["\"<blockhash>\""],
    },
    timeout=30,
)
print(r.json())

const res = await fetch("http://127.0.0.1:8332/", {
  method: "POST",
  headers: {
    "content-type": "application/json",
    "authorization": "Basic " + btoa(`${process.env.RPC_USER}:${process.env.RPC_PASS}`),
  },
  body: JSON.stringify({
    jsonrpc: "1.0",
    id: "docs",
    method: "preciousblock",
    params: ["\"<blockhash>\""],
  }),
});
console.log(await res.json());

Parameters

Name	Type	Req.	Description
blockhash	`string`	yes	the hash of the block to mark as precious

Result

Type: any

null (json null)

Source: services/core-node/bcore/src/rpc/blockchain.cpp:1590

C++ symbol: preciousblock

Code samples

curl --user "$RPC_USER:$RPC_PASS" \
  --data-binary '{"jsonrpc":"1.0","id":"docs","method":"preciousblock","params":["\"<blockhash>\""]}' \
  -H 'content-type: text/plain;' \
  http://127.0.0.1:8332/

bitcoin-cli preciousblock "blockhash"

curl --user myusername --data-binary '{"jsonrpc": "2.0", "id": "curltest", "method": "preciousblock", "params": ["blockhash"]}' -H 'content-type: application/json' http://127.0.0.1:8332/

import requests
r = requests.post(
    "http://127.0.0.1:8332/",
    auth=("$RPC_USER", "$RPC_PASS"),
    json={
        "jsonrpc": "1.0",
        "id": "docs",
        "method": "preciousblock",
        "params": ["\"<blockhash>\""],
    },
    timeout=30,
)
print(r.json())

const res = await fetch("http://127.0.0.1:8332/", {
  method: "POST",
  headers: {
    "content-type": "application/json",
    "authorization": "Basic " + btoa(`${process.env.RPC_USER}:${process.env.RPC_PASS}`),
  },
  body: JSON.stringify({
    jsonrpc: "1.0",
    id: "docs",
    method: "preciousblock",
    params: ["\"<blockhash>\""],
  }),
});
console.log(await res.json());