54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
package offchain
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import (
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"encoding/base64"
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"encoding/hex"
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"fmt"
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)
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const (
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noEncoder = "no-encoding"
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b64Encoder = "base64"
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hexEncoder = "hex"
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)
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type encodingFunc = func([]byte) (string, error)
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// noEncoding returns a byte slice as a string.
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func noEncoding(digest []byte) (string, error) {
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return string(digest), nil
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}
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// base64Encoding returns a byte slice as a b64 encoded string.
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func base64Encoding(digest []byte) (string, error) {
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return base64.StdEncoding.EncodeToString(digest), nil
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}
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// hexEncoding returns a byte slice as a hex encoded string.
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func hexEncoding(digest []byte) (string, error) {
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return hex.EncodeToString(digest), nil
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}
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// getEncoder returns a encodingFunc bases on the encoder id provided.
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func getEncoder(encoder string) (encodingFunc, error) {
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switch encoder {
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case noEncoder:
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return noEncoding, nil
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case b64Encoder:
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return base64Encoding, nil
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case hexEncoder:
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return hexEncoding, nil
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default:
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return nil, fmt.Errorf("unknown encoder: %s", encoder)
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}
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}
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func encodeDigest(encodingFormat string, digest []byte) (string, error) {
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encoder, err := getEncoder(encodingFormat)
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if err != nil {
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return "", err
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}
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return encoder(digest)
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}
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