rlp.go

rlp.go

package main

import (
	"fmt"

	"github.com/ethereum/go-ethereum/rlp"
)

type Envelope struct {
	A uint
}

func encodeSeparately(envelopes ...Envelope) [][]byte {
	rst := [][]byte{}
	for _, e := range envelopes {
		buf, err := rlp.EncodeToBytes(e)
		if err != nil {
			panic(err)
		}
		rst = append(rst, buf)
	}
	return rst
}

func main() {
	first := Envelope{A: 10}
	second := Envelope{A: 20}
	data := []Envelope{first, second}
	buf1, err := rlp.EncodeToBytes(data)
	if err != nil {
		panic(err)
	}
	buf2, err := rlp.EncodeToBytes(encodeSeparately(first, second))
	if err != nil {
		panic(err)
	}
	fmt.Println(buf1, buf2)

	var rst []Envelope
	err = rlp.DecodeBytes(buf1, &rst)
	if err != nil {
		panic(err)
	}
	fmt.Println(rst)

	err = rlp.DecodeBytes(buf2, &rst)
	if err != nil {
		panic(err)
	}
	fmt.Println(rst)
}

[196 193 10 193 20] [198 130 193 10 130 193 20]
[{10} {20}]
panic: rlp: expected input list for main.Envelope, decoding into ([]main.Envelope)[0]

goroutine 1 [running]:
main.main()
/home/dd/status/src/github.com/status-im/status-go/triage.go:48 +0x493
exit status 2