status-go/services/personal/api.go

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package personal
import (
"context"
"errors"
"strings"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
2020-01-02 09:10:19 +00:00
"github.com/status-im/status-go/account"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/params"
"github.com/status-im/status-go/rpc"
)
var (
// ErrInvalidPersonalSignAccount is returned when the account passed to
// personal_sign isn't equal to the currently selected account.
ErrInvalidPersonalSignAccount = errors.New("invalid account as only the selected one can generate a signature")
)
// SignParams required to sign messages
type SignParams struct {
Data interface{} `json:"data"`
Address string `json:"account"`
Password string `json:"password"`
}
// RecoverParams are for calling `personal_ecRecover`
type RecoverParams struct {
Message string `json:"message"`
Signature string `json:"signature"`
}
// PublicAPI represents a set of APIs from the `web3.personal` namespace.
type PublicAPI struct {
rpcClient *rpc.Client
rpcTimeout time.Duration
}
// NewAPI creates an instance of the personal API.
func NewAPI() *PublicAPI {
return &PublicAPI{
rpcTimeout: 300 * time.Second,
}
}
// SetRPC sets RPC params (client and timeout) for the API calls.
func (api *PublicAPI) SetRPC(rpcClient *rpc.Client, timeout time.Duration) {
api.rpcClient = rpcClient
api.rpcTimeout = timeout
}
// Recover is an implementation of `personal_ecRecover` or `web3.personal.ecRecover` API
func (api *PublicAPI) Recover(rpcParams RecoverParams) (addr types.Address, err error) {
ctx, cancel := context.WithTimeout(context.Background(), api.rpcTimeout)
defer cancel()
var gethAddr common.Address
err = api.rpcClient.CallContextIgnoringLocalHandlers(
ctx,
&gethAddr,
api.rpcClient.UpstreamChainID,
params.PersonalRecoverMethodName,
rpcParams.Message, rpcParams.Signature)
addr = types.Address(gethAddr)
return
}
// Sign is an implementation of `personal_sign` or `web3.personal.sign` API
func (api *PublicAPI) Sign(rpcParams SignParams, verifiedAccount *account.SelectedExtKey) (result types.HexBytes, err error) {
if !strings.EqualFold(rpcParams.Address, verifiedAccount.Address.Hex()) {
err = ErrInvalidPersonalSignAccount
return
}
ctx, cancel := context.WithTimeout(context.Background(), api.rpcTimeout)
defer cancel()
var gethResult hexutil.Bytes
err = api.rpcClient.CallContextIgnoringLocalHandlers(
ctx,
&gethResult,
api.rpcClient.UpstreamChainID,
params.PersonalSignMethodName,
rpcParams.Data, rpcParams.Address, rpcParams.Password)
result = types.HexBytes(gethResult)
return
}