forked from cerc-io/ipld-eth-server
70 lines
1.1 KiB
Go
70 lines
1.1 KiB
Go
package bin
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import (
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"encoding/hex"
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"io"
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mc "github.com/multiformats/go-multicodec"
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base "github.com/multiformats/go-multicodec/base"
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)
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var (
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HeaderPath = "/base16/"
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Header = mc.Header([]byte(HeaderPath))
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multic = mc.NewMulticodecFromCodec(Codec(), Header)
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)
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type codec struct{}
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type decoder struct {
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r io.Reader
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}
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func (d decoder) Decode(v interface{}) error {
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out, ok := v.([]byte)
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if !ok {
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return base.ErrExpectedByteSlice
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}
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buf := make([]byte, hex.EncodedLen(len(out)))
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_, err := d.r.Read(buf)
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if err != nil {
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return err
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}
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_, err = hex.Decode(out, buf)
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return err
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}
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func (codec) Decoder(r io.Reader) mc.Decoder {
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return decoder{r}
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}
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type encoder struct {
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w io.Writer
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}
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func (e encoder) Encode(v interface{}) error {
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slice, ok := v.([]byte)
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if !ok {
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return base.ErrExpectedByteSlice
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}
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buf := make([]byte, hex.EncodedLen(len(slice)))
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hex.Encode(buf, slice)
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_, err := e.w.Write(buf)
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return err
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}
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func (codec) Encoder(w io.Writer) mc.Encoder {
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return encoder{w}
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}
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func Codec() mc.Codec {
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return codec{}
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}
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func Multicodec() mc.Multicodec {
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return multic
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}
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