Contract/vswap prevent same token

[twwu123]

PR Details

Prevent users from depositing into V Swap contract if the input tokens are the same.

Motivation and Context

There would be some strange behaviour if users are allowed to swap between the same token, or if the liquidity token is the same as the swappable tokens.

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #286 (3fd9467) into exchange (17501fa) will increase coverage by 12.96%. The diff coverage is 100.00%.

@@              Coverage Diff              @@
##           exchange     #286       +/-   ##
=============================================
+ Coverage     59.70%   72.67%   +12.96%     
=============================================
  Files           207      207               
  Lines          7326     7468      +142     
  Branches        270      256       -14     
=============================================
+ Hits           4374     5427     +1053     
+ Misses         2952     2041      -911     

Impacted Files	Coverage Δ
...scala/vsys/blockchain/contract/ContractVSwap.scala	100.00% <100.00%> (ø)
src/main/scala/vsys/Application.scala	0.00% <0.00%> (ø)
...cala/vsys/api/http/contract/ContractApiRoute.scala	0.00% <0.00%> (ø)
...main/scala/vsys/blockchain/contract/Contract.scala	90.22% <0.00%> (+4.34%)	:arrow_up:
...ala/vsys/blockchain/contract/ContractTokenV2.scala	100.00% <0.00%> (+100.00%)	:arrow_up:
...ala/vsys/blockchain/contract/ContractVEscrow.scala	100.00% <0.00%> (+100.00%)	:arrow_up:
...ala/vsys/blockchain/contract/ContractVOption.scala	100.00% <0.00%> (+100.00%)	:arrow_up:
...vsys/blockchain/contract/ContractVStableSwap.scala	100.00% <0.00%> (+100.00%)	:arrow_up:
...ys/blockchain/contract/ContractNonFungibleV2.scala	100.00% <0.00%> (+100.00%)	:arrow_up:

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