122 lines
3.6 KiB
Go
122 lines
3.6 KiB
Go
package personal
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/status-im/status-go/geth/account"
|
|
"github.com/status-im/status-go/geth/params"
|
|
"github.com/status-im/status-go/geth/rpc"
|
|
"github.com/status-im/status-go/sign"
|
|
)
|
|
|
|
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")
|
|
|
|
// ErrSignInvalidNumberOfParameters is returned when the number of parameters for personal_sign
|
|
// is not valid.
|
|
ErrSignInvalidNumberOfParameters = errors.New("invalid number of parameters for personal_sign (2 or 3 expected)")
|
|
)
|
|
|
|
type metadata struct {
|
|
Data interface{} `json:"data"`
|
|
Address string `json:"account"`
|
|
}
|
|
|
|
func newMetadata(rpcParams []interface{}) (*metadata, error) {
|
|
// personal_sign can be called with the following parameters
|
|
// 1) data to sign
|
|
// 2) account
|
|
// 3) (optional) password
|
|
// here, we always ignore (3) because we send a confirmation for the password to UI
|
|
if len(rpcParams) < 2 || len(rpcParams) > 3 {
|
|
return nil, ErrSignInvalidNumberOfParameters
|
|
}
|
|
data := rpcParams[0]
|
|
address := rpcParams[1].(string)
|
|
|
|
return &metadata{data, address}, nil
|
|
}
|
|
|
|
// PublicAPI represents a set of APIs from the `web3.personal` namespace.
|
|
type PublicAPI struct {
|
|
pendingSignRequests *sign.PendingRequests
|
|
rpcClient *rpc.Client
|
|
rpcTimeout time.Duration
|
|
}
|
|
|
|
// NewAPI creates an instance of the personal API.
|
|
func NewAPI(pendingSignRequests *sign.PendingRequests) *PublicAPI {
|
|
return &PublicAPI{
|
|
pendingSignRequests: pendingSignRequests,
|
|
}
|
|
}
|
|
|
|
// 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(context context.Context, rpcParams ...interface{}) (interface{}, error) {
|
|
var response interface{}
|
|
|
|
err := api.rpcClient.CallContextIgnoringLocalHandlers(
|
|
context, &response, params.PersonalRecoverMethodName, rpcParams...)
|
|
|
|
return response, err
|
|
}
|
|
|
|
// Sign is an implementation of `personal_sign` or `web3.personal.sign` API
|
|
func (api *PublicAPI) Sign(context context.Context, rpcParams ...interface{}) (interface{}, error) {
|
|
metadata, err := newMetadata(rpcParams)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req, err := api.pendingSignRequests.Add(context, params.PersonalSignMethodName, metadata, api.completeFunc(context, *metadata))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
result := api.pendingSignRequests.Wait(req.ID, api.rpcTimeout)
|
|
return result.Response, result.Error
|
|
}
|
|
|
|
func (api *PublicAPI) completeFunc(context context.Context, metadata metadata) sign.CompleteFunc {
|
|
return func(acc *account.SelectedExtKey, password string) (response sign.Response, err error) {
|
|
response = sign.EmptyResponse
|
|
|
|
err = api.validateAccount(metadata, acc)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
err = api.rpcClient.CallContextIgnoringLocalHandlers(
|
|
context,
|
|
&response,
|
|
params.PersonalSignMethodName,
|
|
metadata.Data, metadata.Address, password)
|
|
|
|
return
|
|
}
|
|
}
|
|
|
|
// make sure that only account which created the tx can complete it
|
|
func (api *PublicAPI) validateAccount(metadata metadata, selectedAccount *account.SelectedExtKey) error {
|
|
if selectedAccount == nil {
|
|
return account.ErrNoAccountSelected
|
|
}
|
|
|
|
// case-insensitive string comparison
|
|
if !strings.EqualFold(metadata.Address, selectedAccount.Address.Hex()) {
|
|
return ErrInvalidPersonalSignAccount
|
|
}
|
|
|
|
return nil
|
|
}
|