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// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package params

// GasTable organizes gas prices for different ethereum phases.
type GasTable struct {
    ExtcodeSize uint64
    ExtcodeCopy uint64
    Balance     uint64
    SLoad       uint64
    Calls       uint64
    Suicide     uint64

    ExpByte uint64

    // CreateBySuicide occurs when the
    // refunded account is one that does
    // not exist. This logic is similar
    // to call. May be left nil. Nil means
    // not charged.
    CreateBySuicide uint64
}

// Variables containing gas prices for different ethereum phases.
var (
    // GasTableHomestead contain the gas prices for
    // the homestead phase.
    GasTableHomestead = GasTable{
        ExtcodeSize: 20,
        ExtcodeCopy: 20,
        Balance:     20,
        SLoad:       50,
        Calls:       40,
        Suicide:     0,
        ExpByte:     10,
    }

    // GasTableEIP150 contain the gas re-prices for
    // the EIP150 phase.
    GasTableEIP150 = GasTable{
        ExtcodeSize: 700,
        ExtcodeCopy: 700,
        Balance:     400,
        SLoad:       200,
        Calls:       700,
        Suicide:     5000,
        ExpByte:     10,

        CreateBySuicide: 25000,
    }
    // GasTableEIP158 contain the gas re-prices for
    // the EIP15* phase.
    GasTableEIP158 = GasTable{
        ExtcodeSize: 700,
        ExtcodeCopy: 700,
        Balance:     400,
        SLoad:       200,
        Calls:       700,
        Suicide:     5000,
        ExpByte:     50,

        CreateBySuicide: 25000,
    }
)