forked from rocket-pool/rocketpool-go
/
abi.go
63 lines (49 loc) · 1.63 KB
/
abi.go
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package rocketpool
import (
"bytes"
"compress/zlib"
"encoding/base64"
"fmt"
"github.com/ethereum/go-ethereum/accounts/abi"
)
// Decode, decompress and parse a zlib-compressed, base64-encoded ABI
func DecodeAbi(abiEncoded string) (*abi.ABI, error) {
// base64 decode
abiCompressed, err := base64.StdEncoding.DecodeString(abiEncoded)
if err != nil {
return nil, fmt.Errorf("Could not decode base64 data: %w", err)
}
// zlib decompress
byteReader := bytes.NewReader(abiCompressed)
zlibReader, err := zlib.NewReader(byteReader)
if err != nil {
return nil, fmt.Errorf("Could not decompress zlib data: %w", err)
}
defer func() {
_ = zlibReader.Close()
}()
// Parse ABI
abiParsed, err := abi.JSON(zlibReader)
if err != nil {
return nil, fmt.Errorf("Could not parse JSON: %w", err)
}
// Return
return &abiParsed, nil
}
// zlib-compress and base64-encode an ABI JSON string
func EncodeAbiStr(abiStr string) (string, error) {
// zlib compress
var abiCompressed bytes.Buffer
zlibWriter := zlib.NewWriter(&abiCompressed)
if _, err := zlibWriter.Write([]byte(abiStr)); err != nil {
return "", fmt.Errorf("Could not zlib-compress ABI string: %w", err)
}
if err := zlibWriter.Flush(); err != nil {
return "", fmt.Errorf("Could not zlib-compress ABI string: %w", err)
}
if err := zlibWriter.Close(); err != nil {
return "", fmt.Errorf("Could not zlib-compress ABI string: %w", err)
}
// base64 encode & return
return base64.StdEncoding.EncodeToString(abiCompressed.Bytes()), nil
}