* Use cosmossdk.io/errors for deprecated error methods
* Update error registration with cosmossdk.io/errors
* Use cosmossdk.io/math for deprecated sdk.Int alias
* Fix modified proto file
* Update sdk.Int usage in swap hooks
* Update e2e test deprecated method usage
* swap module scaffolding
* global swap fee
* can't think of a reason for begin blocker; removing for abci.go for now;
* test pair types; refactor pair name logic; simplify pairs validation and
fix stack overflow error
* check comparison
* use test package
* init swap module genesis
* add basic marshall tests
* remove reward apy from pairs
* fix integration helpers
* use max swap fee constant; fix validation of swap fee; add tests to
cover param validation and param set setup
* use noerror over nil
* start genesis tests
* test param set validation mirrors param validation
* add genesis tests
* remove print statement
* add subtests for genesis test cases; add extra querier test for unknown
route; add keeper params testing
* add spec
* update swagger
* find replace hard -> swap in comments
* remove unused method
* rename pairs to allowed pools; pool is more commonly used, and
allowedPool makes it more clear what swap parameter is for. In
addition, we won't conflict with Pool data structure for storing a
created pool in the store.
* remove generated link
* missed spec rename
* validate token order for allowed pools
* fix swagger
* json should be snakecase; change allowedPools to allowed_pools
Co-authored-by: Nick DeLuca <nickdeluca08@gmail.com>