Imports keys from a wallet dump file (see dumpwallet). Requires a new wallet backup. Only for legacy wallets.
filenamestringREQUIREDcurl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"importwallet","params":["/tmp/dump.txt"]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/null