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package arbo
import "math/big"
// SwapEndianness swaps the order of the bytes in the byte slice.
func SwapEndianness(b []byte) []byte {
o := make([]byte, len(b))
for i := range b {
o[len(b)-1-i] = b[i]
}
return o
}
// BigIntToBytes converts a *big.Int into a byte array in Little-Endian
func BigIntToBytes(blen int, bi *big.Int) []byte {
// TODO make the length depending on the tree.hashFunction.Len()
b := make([]byte, blen)
copy(b[:], SwapEndianness(bi.Bytes()))
return b[:]
}
// BytesToBigInt converts a byte array in Little-Endian representation into
// *big.Int
func BytesToBigInt(b []byte) *big.Int {
return new(big.Int).SetBytes(SwapEndianness(b))
}