Changes to Estimate gas cost of creating a transaction

added the new optional request property feeSponsorshipToken

added the optional property error/code to the response with the 400 status

added the optional property error/code to the response with the 401 status

added the optional property error/code to the response with the 409 status

added the optional property error/param to the response with the 400 status

added the optional property error/param to the response with the 401 status

added the optional property error/param to the response with the 409 status

the endpoint scheme security auth_token was added to the API

the endpoint scheme security better_auth was removed from the API

the security scope transactions:write was added to the endpoint's security scheme sk

the endpoint scheme security pk_identity_token was removed from the API