elasticsearch-js/docs/reference/api/IngestFingerprintProcessor.md

Interface IngestFingerprintProcessor

Name	Type	Description
fields	Fields	Array of fields to include in the fingerprint. For objects, the processor hashes both the field key and value. For other fields, the processor hashes only the field value.
ignore_missing	boolean	If true, the processor ignores any missing fields. If all fields are missing, the processor silently exits without modifying the document.
method	IngestFingerprintDigest	The hash method used to compute the fingerprint. Must be one of MD5, SHA-1, SHA-256, SHA-512, or MurmurHash3.
salt	string	Salt value for the hash function.
target_field	Field	Output field for the fingerprint.