Dumps all wallet keys in a human-readable format to a server-side file. Only for legacy wallets.
filenamestringREQUIREDcurl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"dumpwallet","params":["/tmp/dump.txt"]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/{
"filename": "/tmp/dump.txt"
}