fix: support fee calculation for BifrostPolkadot

[hqwangningbo]

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[cla-bot-2021]

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[TarikGul]

Hey @hqwangningbo, Thanks for the contribution. This is my bad as I need to remove the guide for adding fee calculation. But @substrate/calc calcFee is no longer supported in Sidecar. This is because weight_to_fee and length_to_fee is no longer exposed in substrate. We are working to expand the algorithm to support all chains fees by default without anyone having to add their fee config. The following PR #974 and discussion can be seen here.

I will leave this PR up if you still want the config for the controllers in, but if you want accurate partialFee abstraction, for now it is advised to use ?feeByEvent=true query param for /blocks. Let me know if you still want it in.

[hqwangningbo]

Hey @TarikGul,thank you for your work. I understand 😊

[TarikGul]

@hqwangningbo, if you revert the changes in calc we can still push this in with the Bifrost controller configs. :)

[hqwangningbo]

@hqwangningbo, if you revert the changes in calc we can still push this in with the Bifrost controller configs. :)

Hey @TarikGul, I have updated it.

[TarikGul]

LGTM, @hqwangningbo is there an active node for bifrost_polkadot right now to double check the specName?

[hqwangningbo]

LGTM, @hqwangningbo is there an active node for bifrost_polkadot right now to double check the specName?

yes , we have😊. wss://hk.p.bifrost-rpc.liebi.com/ws