status-go/services/utils/utils.go

package utils

import (
	"math/big"
	"strings"

	"github.com/ethereum/go-ethereum/accounts/abi/bind"
	"github.com/ethereum/go-ethereum/common"
	ethTypes "github.com/ethereum/go-ethereum/core/types"
	"github.com/status-im/status-go/account"
	"github.com/status-im/status-go/api/multiformat"
	"github.com/status-im/status-go/eth-node/crypto"
	"github.com/status-im/status-go/eth-node/types"
	prot_common "github.com/status-im/status-go/protocol/common"
)

func GetSigner(chainID uint64, accountsManager *account.GethManager, keyStoreDir string, from types.Address, password string) bind.SignerFn {
	return func(addr common.Address, tx *ethTypes.Transaction) (*ethTypes.Transaction, error) {
		selectedAccount, err := accountsManager.VerifyAccountPassword(keyStoreDir, from.Hex(), password)
		if err != nil {
			return nil, err
		}
		s := ethTypes.NewLondonSigner(new(big.Int).SetUint64(chainID))
		return ethTypes.SignTx(tx, s, selectedAccount.PrivateKey)
	}
}

func DeserializePublicKey(compressedKey string) (types.HexBytes, error) {
	rawKey, err := multiformat.DeserializePublicKey(compressedKey, "f")
	if err != nil {
		return nil, err
	}

	secp256k1Code := "fe701"
	pubKeyBytes := "0x" + strings.TrimPrefix(rawKey, secp256k1Code)

	pubKey, err := prot_common.HexToPubkey(pubKeyBytes)
	if err != nil {
		return nil, err
	}

	return crypto.CompressPubkey(pubKey), nil
}

func SerializePublicKey(compressedKey types.HexBytes) (string, error) {
	rawKey, err := crypto.DecompressPubkey(compressedKey)
	if err != nil {
		return "", err
	}
	pubKey := types.EncodeHex(crypto.FromECDSAPub(rawKey))

	secp256k1Code := "0xe701"
	base58btc := "z"
	multiCodecKey := secp256k1Code + strings.TrimPrefix(pubKey, "0x")
	cpk, err := multiformat.SerializePublicKey(multiCodecKey, base58btc)
	if err != nil {
		return "", err
	}
	return cpk, nil
}