How to implement datum

We generate datum script using below :

cardano-cli transaction hash-script-data --script-data-file ${datum_name}.datum

It generates the datum script. once we have datum we need to incluide it into transaction
that is generated on cli again

cardano-cli transaction build
–tx-in ${utxoin}
–tx-out-datum-hash ${hashes[0]}
–metadata-json-file metadata.json \

Please let me know how to do above datum using nami-wallet-api?