Airdrop (#628)

* Airdrop

* airdrop with signature

* benchmark tests

* Partial changes

* remove unused

* remove failsafe and refund from eth airdrop

* reorg

* no sig airdrop for eth

* claim condition id and reset

* cleanup

* prefix ERC

* fix

* unit tests wip

* rename

* update tests

* Update

* receive and withdraw functions

* cleanup

* fix uid check

* test revert cases

* update claim hash generation and merkle root checks

* tests

* gasreport

* Add onlyOwner for airdrop functions

* isClaimed view function

* remove conditionId param from isClaimed

* events

* update isClaimed

* update dependencies

* fix

---------

Co-authored-by: Jake Loo <[email protected]>

Author: kumaryash90

.gitmodules

@@ -22,3 +22,6 @@
 [submodule "lib/dynamic-contracts"]
 	path = lib/dynamic-contracts
 	url = https://github.com/thirdweb-dev/dynamic-contracts
+[submodule "lib/solady"]
+	path = lib/solady
+	url = https://github.com/vectorized/solady