dumpwallet "filename"
Dumps all wallet keys in a human-readable format.
Arguments:
1. "filename" (string, required) The filename
Examples:
> bitcoin-cli dumpwallet "test"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "dumpwallet", "params": ["test"] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/