/
coin.go
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/
coin.go
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// Copyright 2021 Evmos Foundation
// This file is part of Evmos' Ethermint library.
//
// The Ethermint 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 Ethermint 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 Ethermint library. If not, see https://github.com/evmos/ethermint/blob/main/LICENSE
package types
import (
"math/big"
sdkmath "cosmossdk.io/math"
sdk "github.com/cosmos/cosmos-sdk/types"
)
const (
// AttoPhoton defines the default coin denomination used in Ethermint in:
//
// - Staking parameters: denomination used as stake in the dPoS chain
// - Mint parameters: denomination minted due to fee distribution rewards
// - Governance parameters: denomination used for spam prevention in proposal deposits
// - Crisis parameters: constant fee denomination used for spam prevention to check broken invariant
// - EVM parameters: denomination used for running EVM state transitions in Ethermint.
AttoPhoton string = "aphoton"
// BaseDenomUnit defines the base denomination unit for Photons.
// 1 photon = 1x10^{BaseDenomUnit} aphoton
BaseDenomUnit = 18
// DefaultGasPrice is default gas price for evm transactions
DefaultGasPrice = 20
)
// PowerReduction defines the default power reduction value for staking
var PowerReduction = sdkmath.NewIntFromBigInt(new(big.Int).Exp(big.NewInt(10), big.NewInt(BaseDenomUnit), nil))
// NewPhotonCoin is a utility function that returns an "aphoton" coin with the given sdkmath.Int amount.
// The function will panic if the provided amount is negative.
func NewPhotonCoin(amount sdkmath.Int) sdk.Coin {
return sdk.NewCoin(AttoPhoton, sdk.NewIntFromBigInt(amount.BigInt()))
}
// NewPhotonDecCoin is a utility function that returns an "aphoton" decimal coin with the given sdkmath.Int amount.
// The function will panic if the provided amount is negative.
func NewPhotonDecCoin(amount sdkmath.Int) sdk.DecCoin {
return sdk.NewDecCoin(AttoPhoton, sdk.NewIntFromBigInt(amount.BigInt()))
}
// NewPhotonCoinInt64 is a utility function that returns an "aphoton" coin with the given int64 amount.
// The function will panic if the provided amount is negative.
func NewPhotonCoinInt64(amount int64) sdk.Coin {
return sdk.NewInt64Coin(AttoPhoton, amount)
}