Change node: dynamically set a property

[moebius]

This is possible with a jsonata expression ($eval) - here you can see an example:

Allow target to be also a jsonata expression

In the source field i can enter something like this: $eval(payload[0].payload.cfg.p1,payload[1]) which returns a field in payload[1], defined by the string in .p1 (like "payload.data.val")