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# System prepended metadata

title: Advance ink!

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# Advance ink!


**Storage**

https://use.ink/datastructures/overview

- [ ]  Explaination
Assigned

- [ ] Code Walkthrough
Assigned

- [ ] Demo
Assigned


**Chain Extension**

https://use.ink/macros-attributes/chain-extension

- [ ]  Explaination
Assigned

- [ ] Code Walkthrough
Assigned

- [ ] Demo
Assigned

**Custom Environment**

https://use.ink/basics/chain-environment-types/

- [ ]  Explaination
Assigned

- [ ] Code Walkthrough
Assigned

- [ ] Demo
Assigned


**Cross Contract**

- [ ]  Explaination
Assigned

- [ ] Code Walkthrough
Assigned

- [ ] Demo
Assigned