The importwallet RPC imports keys from a wallet dump file (see dumpwallet). Requires a new wallet backup to include imported keys.
importwallet "filename"
*bitcoin-cli help importwallet
importwallet "filename" Imports keys from a wallet dump file (see dumpwallet). Requires a new wallet backup to include imported keys. Note: Blockchain and Mempool will be rescanned after a successful import. Use "getwalletinfo" to query the scanning progress. Arguments: 1. filename (string, required) The wallet file Result: null (json null) Examples: Dump the wallet > bitcoin-cli dumpwallet "test" Import the wallet > bitcoin-cli importwallet "test" Import using the json rpc call > curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "importwallet", "params": ["test"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/