github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/tequilapi/contract/tokens.go (about)

     1  /*
     2   * Copyright (C) 2022 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package contract
    19  
    20  import (
    21  	"math/big"
    22  
    23  	"github.com/mysteriumnetwork/payments/crypto"
    24  	"github.com/shopspring/decimal"
    25  )
    26  
    27  // TokensZero zero amount
    28  var TokensZero = Tokens{Wei: "0", Ether: "0", Human: "0"}
    29  
    30  // HumanPrecision default human ether amount precision
    31  const HumanPrecision = 6
    32  
    33  // Tokens a common response for ethereum blockchain monetary amount
    34  type Tokens struct {
    35  	Wei   string `json:"wei"`
    36  	Ether string `json:"ether"`
    37  	Human string `json:"human"`
    38  }
    39  
    40  // NewTokens convenience constructor for Tokens
    41  func NewTokens(amount *big.Int) Tokens {
    42  	if amount == nil {
    43  		return TokensZero
    44  	}
    45  
    46  	ethers := crypto.BigMystToDecimal(amount)
    47  
    48  	return Tokens{
    49  		Wei:   amount.String(),
    50  		Ether: ethers.String(),
    51  		Human: ethers.Truncate(HumanPrecision).String(),
    52  	}
    53  }
    54  
    55  // NewTokensFromDecimal convenience constructor for Tokens
    56  func NewTokensFromDecimal(amount decimal.Decimal) Tokens {
    57  	return Tokens{
    58  		Wei:   crypto.DecimalToBigMyst(amount).String(),
    59  		Ether: amount.String(),
    60  		Human: amount.Truncate(HumanPrecision).String(),
    61  	}
    62  }
    63  
    64  func (t Tokens) String() string {
    65  	return t.Human
    66  }