feature: Smart Contract Tax Whitelist

[fragwuerdig]

This is the Whitelist that passed governance. Description of acceptance criteria can be found here. This Changeset includes:

• Add HasBurnTaxExemptionContract function to treasury keeper
• Incject wasm keeper dependency into treasury (by reference)
• Adjust test env mocking accordingly
• Write Tests

[nghuyenthevinh2000]

@alchemist-ti while waiting for USTC team response, can you work on this

[nghuyenthevinh2000]

@alchemist-ti I think the unit test is broken somehow, when I try with feeAmt * 2 for "MsgExecuteContract(exemption), MsgExecuteContract(normal)", it also passes as well. So this is false positive scenario.

[alchemist-ti]

@alchemist-ti I think the unit test is broken somehow, when I try with feeAmt * 2 for "MsgExecuteContract(exemption), MsgExecuteContract(normal)", it also passes as well. So this is false positive scenario.

@nghuyenthevinh2000 This test case makes sense. ExpectedFeeAmount means the minimum FeeAmount, if gas fee is greater than it, the transaction will pass.

[nghuyenthevinh2000]

@alchemist-ti I think the unit test is broken somehow, when I try with feeAmt * 2 for "MsgExecuteContract(exemption), MsgExecuteContract(normal)", it also passes as well. So this is false positive scenario.

@nghuyenthevinh2000 This test case makes sense. ExpectedFeeAmount means the minimum FeeAmount, if gas fee is greater than it, the transaction will pass.

ExpectedFeeAmount means the correct amount. I built this test case to ensure that fee calculation will be skipped only on whitelisted <-> whitelisted. Please have a look again.

[alchemist-ti]

ExpectedFeeAmount means the correct amount. I built this test case to ensure that fee calculation will be skipped only on whitelisted <-> whitelisted. Please have a look again.

For Cosmos, unused gas fees are not refunded, so if fee amount > min fee amount, fee amount will be deducted. If we want to check that taxes are calculated correctly, we should check treasury.TaxProceeds.

[nghuyenthevinh2000]

Confirmed working, thanks you @alchemist-ti