can syncLead api update an anonymous lead to a known lead

[Anonymous]

can syncLead associate the munchkin cookie of an anonymous lead to a known lead, including pageviews,Campaigns

can syncLead update a known lead by  the munchkin cookie  ,and merge the anonymous lead's pageviews,Campaigns to the known lead ?

the more data transfer solution are as follows ：

1、mywebsite {cookie+pageviews,Campaigns} ------auto-----> marketo()
2、mywebsite {Email,firstname,... etc data} ---send-----> salesforce
3、mywebsite {cookie + Email }-----send(syncLead)----->marketo(syncLead)
4、salesforce{Email,firstname,... etc data} ---- send（ Marketo App）---->marketo


the steps above  ,is this solution works?

[Anonymous]

We did this for a very custom implementation with the help of their lead developer. I can't answer specifics on how the code was written, but we are updating and merging anonymous leads with known leads through the API.