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verification.go
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verification.go
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package winners
// import (
// "encoding/csv"
// "fmt"
// "io"
// "os"
// "strings"
// "github.com/archway-network/testeval/configs"
// "github.com/archway-network/testeval/events"
// "github.com/archway-network/testeval/progressbar"
// // staking "github.com/cosmos/cosmos-sdk/x/staking/types"
// // "github.com/gogo/protobuf/proto"
// "google.golang.org/grpc"
// )
// /*----------------*/
// type verificationDataType struct { //map[email]...
// Email string
// KYCId string
// }
// // Used for quick search
// var verificationData map[string]verificationDataType
// /*----------------*/
// // This function inspects the received tx to the `verifier_account`
// // and checks its memo field for a particular data (e.g. `email address`)
// // in order to match it with already existing data
// // If the existing data matches with the account holder is sent, the account is verified
// func (w *Winner) Verify(conn *grpc.ClientConn) (bool, error) {
// // Check the cache first
// if verified, found := readVerificationCache(w.Address); found {
// return verified, nil
// }
// response, err := events.GetTxEvents(conn,
// []string{
// "message.module='bank'",
// "message.action='/cosmos.bank.v1beta1.MsgSend'",
// fmt.Sprintf("message.sender='%s'", w.Address),
// fmt.Sprintf("coin_received.receiver='%s'", configs.Configs.IdVerification.VerifierAccount),
// }, 100, 0)
// if err != nil {
// return false, err
// }
// if response == nil ||
// response.TxResponses == nil ||
// len(response.TxResponses) == 0 {
// return false, nil
// }
// // We extract multiple transactions as the user might re-send another tx to correct a previousely sent wrong data
// for i := range response.Txs {
// usersVerificationData, err := extractVerificationDataFromTxMemo(response.Txs[i].Body.Memo)
// if err != nil {
// // If the memo format does not match with what we want, just ignore it
// continue
// }
// foundUserVerificationData, err := findVerificationDataByEmail(usersVerificationData.Email)
// if err != nil {
// return false, err
// }
// if foundUserVerificationData.Email != "" &&
// foundUserVerificationData.KYCId != "" &&
// foundUserVerificationData.Email == usersVerificationData.Email &&
// foundUserVerificationData.KYCId == usersVerificationData.KYCId {
// w.Verified = true
// w.VerificationData = foundUserVerificationData
// addToVerificationCache(w.Address, true)
// return true, nil
// }
// }
// addToVerificationCache(w.Address, false)
// return false, nil
// }
// /*-------------*/
// var verificationCache map[string]bool // to cache the verification results
// func addToVerificationCache(address string, verified bool) {
// if verificationCache == nil {
// verificationCache = make(map[string]bool)
// }
// verificationCache[address] = verified
// }
// func readVerificationCache(address string) (bool, bool) {
// verified, found := verificationCache[address]
// return verified, found
// }
// /*-------------*/
// func loadVerificationData() (map[string]verificationDataType, error) {
// dataList := make(map[string]verificationDataType)
// f, err := os.Open(configs.Configs.IdVerification.InputFile.Path)
// if err != nil {
// return nil, err
// }
// defer f.Close()
// csvReader := csv.NewReader(f)
// headers, err := csvReader.Read()
// if err != nil {
// return nil, err
// }
// emailIndex := -1
// kycIndex := -1
// for i := range headers {
// if headers[i] == configs.Configs.IdVerification.InputFile.Fields.Email {
// emailIndex = i
// }
// if headers[i] == configs.Configs.IdVerification.InputFile.Fields.KYCId {
// kycIndex = i
// }
// }
// for {
// line, err := csvReader.Read()
// if err == io.EOF {
// break
// }
// if err != nil {
// return nil, err
// }
// dataList[line[emailIndex]] = verificationDataType{
// Email: line[emailIndex],
// KYCId: line[kycIndex],
// }
// }
// return dataList, nil
// }
// func findVerificationDataByEmail(email string) (verificationDataType, error) {
// // Load the csv file if we have not done it yet
// var err error
// if verificationData == nil {
// verificationData, err = loadVerificationData()
// if err != nil {
// return verificationDataType{}, err
// }
// }
// if foundItem, ok := verificationData[email]; ok {
// return foundItem, nil
// }
// return verificationDataType{}, nil
// }
// // We have to set a rule for example saying users need
// // to enter their email address then and space followed by their KYC code
// func extractVerificationDataFromTxMemo(memo string) (verificationDataType, error) {
// memo = strings.Trim(memo, " \r\n\t")
// if len(memo) == 0 {
// return verificationDataType{}, nil
// }
// memoFields := strings.Fields(memo)
// if len(memoFields) != 2 {
// return verificationDataType{}, fmt.Errorf("invalid Tx memo format: `%s`", memo)
// }
// return verificationDataType{
// Email: memoFields[0],
// KYCId: memoFields[1],
// }, nil
// }
// func (w *WinnersList) VerifyAll(conn *grpc.ClientConn) error {
// var bar progressbar.Bar
// bar.NewOption(0, int64(w.Length()))
// for i := 0; i < w.Length(); i++ {
// _, err := w.list[i].Verify(conn)
// if err != nil {
// return err
// }
// bar.Play(int64(i))
// }
// bar.Finish()
// return nil
// }