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## Description
Closes: #10243
Charge the per-byte fee for the key length as for the values in gas meter
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## Description
Changes the `sdk.Msg` interface method `GetSigners() []string` to `GetSigners() []sdk.AccAddress`
Closes: #9885
+change GetSigner return type
+defer address checking to each msg's `ValidateBasic` method
+clean up consistency/redundancy issues in validate basic
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closes: #9239
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* enable secp256r1 in antehandlers
* Add sig verification benchamrk to find a sigverify fee
* adjust the gas fee
* enable secp256r1 in antehandlers
* Add sig verification benchamrk to find a sigverify fee
* adjust the gas fee
* Update the secp256r1 fee factor
* Update changelog
* regenerate docs
likhita-809
Tyler
atheeshp
Amaury
Alessio Treglia
Robert Zaremba
Marie Gauthier
Amaury Martiny