getblockhash (0.21.0.0 RPC) getblockhash height Returns hash of block in best-block-chain at height provided. Arguments: 1. height (numeric, required) The height index Result: "hex" (string) The block hash Examples: > elements-cli getblockhash 1000 > curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "getblockhash", "params": [1000]}' -H 'content-type: text/plain;' http://127.0.0.1:7041/