Message Properties - GogoVega/node-red-contrib-firebase-realtime-database GitHub Wiki

Below are two tables showing the properties of the incoming and outgoing message:

Input

Property	Description	Type	Firebase IN	Firebase GET	Firebase OUT
payload	The data to add/modify to the database	string, boolean, number, array, object or null	:x:	:x:	:white_check_mark:
method	The method of writing data	string	:x:	:x:	:white_check_mark:
listener	The listener type	string	:white_check_mark:	:x:	:x:
constraints	The Query Constraints to apply	object	:white_check_mark:	:white_check_mark:	:x:
priority	The priority to be applied to the data	number	:x:	:x:	:white_check_mark:
topic	The path where to read/write the data	string	:white_check_mark:	:white_check_mark:	:white_check_mark:

Output

Property	Description	Type
payload	Contains your query data from the database	string, boolean, number, array, object or null
previousChildName	Contains the key of the previous child, by sort order, or null if it is the first child	string, undefined or null
priority	The priority of the data	number or null
topic	The last part of the data path	string