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package ethutil
import (
"fmt"
"math/big"
)
// The different number of units
var (
Douglas = BigPow(10, 42)
Einstein = BigPow(10, 21)
Ether = BigPow(10, 18)
Finney = BigPow(10, 15)
Szabo = BigPow(10, 12)
Shannon = BigPow(10, 9)
Babbage = BigPow(10, 6)
Ada = BigPow(10, 3)
Wei = big.NewInt(1)
)
//
// Currency to string
// Returns a string representing a human readable format
func CurrencyToString(num *big.Int) string {
switch {
case num.Cmp(Douglas) >= 0:
return fmt.Sprintf("%v Douglas", new(big.Int).Div(num, Douglas))
case num.Cmp(Einstein) >= 0:
return fmt.Sprintf("%v Einstein", new(big.Int).Div(num, Einstein))
case num.Cmp(Ether) >= 0:
return fmt.Sprintf("%v Ether", new(big.Int).Div(num, Ether))
case num.Cmp(Finney) >= 0:
return fmt.Sprintf("%v Finney", new(big.Int).Div(num, Finney))
case num.Cmp(Szabo) >= 0:
return fmt.Sprintf("%v Szabo", new(big.Int).Div(num, Szabo))
case num.Cmp(Shannon) >= 0:
return fmt.Sprintf("%v Shannon", new(big.Int).Div(num, Shannon))
case num.Cmp(Babbage) >= 0:
return fmt.Sprintf("%v Babbage", new(big.Int).Div(num, Babbage))
case num.Cmp(Ada) >= 0:
return fmt.Sprintf("%v Ada", new(big.Int).Div(num, Ada))
}
return fmt.Sprintf("%v Wei", num)
}
// Common big integers often used
var (
Big1 = big.NewInt(1)
Big2 = big.NewInt(2)
Big0 = big.NewInt(0)
Big32 = big.NewInt(32)
Big256 = big.NewInt(0xff)
)
// Creates an ethereum address given the bytes and the nonce
func CreateAddress(b []byte, nonce *big.Int) []byte {
addrBytes := append(b, nonce.Bytes()...)
return Sha3Bin(addrBytes)[12:]
}
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