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bech32.go
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bech32.go
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package bech32
import (
"errors"
"fmt"
"github.com/btcsuite/btcutil/bech32"
)
// GetFromBech32 decodes a byte string from a Bech32 encoded string.
func GetFromBech32(bech32str, prefix string) ([]byte, error) {
if len(bech32str) == 0 {
return nil, errors.New("decoding Bech32 address failed: must provide an address")
}
hrp, bz, err := DecodeAndConvert(bech32str)
if err != nil {
return nil, err
}
if hrp != prefix {
return nil, fmt.Errorf("invalid Bech32 prefix; expected %s, got %s", prefix, hrp)
}
return bz, nil
}
//ConvertAndEncode converts from a base64 encoded byte string to base32 encoded byte string and then to bech32
func ConvertAndEncode(hrp string, data []byte) (string, error) {
converted, err := bech32.ConvertBits(data, 8, 5, true)
if err != nil {
return "", err
}
return bech32.Encode(hrp, converted)
}
//DecodeAndConvert decodes a bech32 encoded string and converts to base64 encoded bytes
func DecodeAndConvert(bech string) (string, []byte, error) {
hrp, data, err := bech32.Decode(bech)
if err != nil {
return "", nil, err
}
converted, err := bech32.ConvertBits(data, 5, 8, false)
if err != nil {
return "", nil, err
}
return hrp, converted, nil
}