Review and adjust system components affected by Policy contract minimum GAS price setting #162
Description
Rationale
Native Policy (#7) contract introduces MinGASPrice setting. This setting is integrated into both txpool state-dependent verification and node state verification (#6). This setting directly affects the node's end-users those transactions may be declined due to insufficient GAS price.
Implementation
Within the scope of this issue we need to check all the places where newly-introduced Policy setting may affect the user's experience or the node behaviour. Ref. #7 (comment) as an example, one of such places is eth_gasPrice API.