getblockhash

blockchain safe since 0.6.0

returns the header hash of a block at the given height in the local best block chain.

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Run this RPC switch to raw JSON

Call from your own code

Replace $BITCOIN_RPC_USER / $BITCOIN_RPC_PASSWORD with credentials from your bitcoind's bitcoin.conf, and replace localhost:8332 with your node's RPC address.

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getblockhash height

Returns hash of block in best-block-chain at height provided.

Arguments:
1. height         (numeric, required) The height index

Result:
"hash"         (string) The block hash

Examples:
> bitcoin-cli getblockhash 1000
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getblockhash", "params": [1000] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/

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