urdt/ussd
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add the tokens functionality to the common package

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This commit is contained in:
Alfred Kamanda 2024-11-14 21:21:04 +03:00
parent 5773305785
commit de5ecc5fe7
Signed by: Alfred-mk
GPG Key ID: 7EA3D01708908703
2 changed files with 71 additions and 32 deletions
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54
common/tokens.go Normal file
View File

@ -0,0 +1,54 @@
package common
import (
"context"
"math/big"
"strconv"
)
func ParseAndScaleAmount(storedAmount, activeDecimal []byte) (string, error) {
// Parse token decimal
tokenDecimal, err := strconv.Atoi(string(activeDecimal))
if err != nil {
return "", err
}
// Parse amount
amount, _, err := big.ParseFloat(string(storedAmount), 10, 0, big.ToZero)
if err != nil {
return "", err
}
// Scale the amount
multiplier := new(big.Float).SetInt(new(big.Int).Exp(big.NewInt(10), big.NewInt(int64(tokenDecimal)), nil))
finalAmount := new(big.Float).Mul(amount, multiplier)
// Convert finalAmount to a string
finalAmountStr := new(big.Int)
finalAmount.Int(finalAmountStr)
return finalAmountStr.String(), nil
}
func ReadTransactionData(ctx context.Context, store DataStore, sessionId string) (map[DataTyp][]byte, error) {
dataKeys := []DataTyp{
DATA_TEMPORARY_VALUE,
DATA_ACTIVE_SYM,
DATA_AMOUNT,
DATA_PUBLIC_KEY,
DATA_RECIPIENT,
DATA_ACTIVE_DECIMAL,
DATA_ACTIVE_ADDRESS,
}
data := make(map[DataTyp][]byte)
for _, key := range dataKeys {
value, err := store.ReadEntry(ctx, sessionId, key)
if err != nil {
return nil, err
}
data[key] = value
}
return data, nil
}

49
internal/handlers/ussd/menuhandler.go
View File

@ -4,7 +4,6 @@ import (
"bytes"
"context"
"fmt"
"math/big"
"path"
"regexp"
"strconv"
@ -1176,7 +1175,7 @@ func (h *Handlers) GetSender(ctx context.Context, sym string, input []byte) (res
return res, fmt.Errorf("missing session")
}
res.Content = string(sessionId)
res.Content = sessionId
return res, nil
}
@ -1205,8 +1204,7 @@ func (h *Handlers) GetAmount(ctx context.Context, sym string, input []byte) (res
return res, nil
}
// InitiateTransaction returns a confirmation and resets the transaction data
// on the gdbm store.
// InitiateTransaction calls the TokenTransfer and returns a confirmation based on the result
func (h *Handlers) InitiateTransaction(ctx context.Context, sym string, input []byte) (resource.Result, error) {
var res resource.Result
var err error
@ -1215,57 +1213,44 @@ func (h *Handlers) InitiateTransaction(ctx context.Context, sym string, input []
return res, fmt.Errorf("missing session")
}
flag_api_error, _ := h.flagManager.GetFlag("flag_api_call_error")
account_authorized_flag, _ := h.flagManager.GetFlag("flag_account_authorized")
flag_account_authorized, _ := h.flagManager.GetFlag("flag_account_authorized")
code := codeFromCtx(ctx)
l := gotext.NewLocale(translationDir, code)
l.AddDomain("default")
store := h.userdataStore
recipientNumber, _ := store.ReadEntry(ctx, sessionId, common.DATA_TEMPORARY_VALUE)
activeSym, _ := store.ReadEntry(ctx, sessionId, common.DATA_ACTIVE_SYM)
storedAmount, _ := store.ReadEntry(ctx, sessionId, common.DATA_AMOUNT)
fromAddress, _ := store.ReadEntry(ctx, sessionId, common.DATA_PUBLIC_KEY)
toAddress, _ := store.ReadEntry(ctx, sessionId, common.DATA_RECIPIENT)
activeDecimal, _ := store.ReadEntry(ctx, sessionId, common.DATA_ACTIVE_DECIMAL)
tokenAddress, _ := store.ReadEntry(ctx, sessionId, common.DATA_ACTIVE_ADDRESS)
// Parse tokendecimal
tokenDecimal, err := strconv.Atoi(string(activeDecimal))
data, err := common.ReadTransactionData(ctx, h.userdataStore, sessionId)
if err != nil {
return res, err
}
// Parse amount and scale it
amount, _, err := big.ParseFloat(string(storedAmount), 10, 0, big.ToZero)
finalAmountStr, err := common.ParseAndScaleAmount(data[common.DATA_AMOUNT], data[common.DATA_ACTIVE_DECIMAL])
if err != nil {
return res, err
}
multiplier := new(big.Float).SetInt(new(big.Int).Exp(big.NewInt(10), big.NewInt(int64(tokenDecimal)), nil))
finalAmount := new(big.Float).Mul(amount, multiplier)
// Convert finalAmount to a string
finalAmountStr := new(big.Int)
finalAmount.Int(finalAmountStr)
// Call TokenTransfer
r, err := h.accountService.TokenTransfer(ctx, finalAmountStr.String(), string(fromAddress), string(toAddress), string(tokenAddress))
r, err := h.accountService.TokenTransfer(ctx, finalAmountStr, string(data[common.DATA_PUBLIC_KEY]), string(data[common.DATA_RECIPIENT]), string(data[common.DATA_ACTIVE_ADDRESS]))
if err != nil {
res.Content = l.Get("Your request failed. Please try again later.")
flag_api_error, _ := h.flagManager.GetFlag("flag_api_call_error")
res.FlagSet = append(res.FlagSet, flag_api_error)
res.Content = l.Get("Your request failed. Please try again later.")
logg.ErrorCtxf(ctx, "failed on TokenTransfer", "error", err)
return res, err
return res, nil
}
trackingId := r.TrackingId
logg.InfoCtxf(ctx, "TokenTransfer", "trackingId", trackingId)
res.Content = l.Get("Your request has been sent. %s will receive %s %s from %s.", string(recipientNumber), string(storedAmount), string(activeSym), string(sessionId))
res.Content = l.Get(
"Your request has been sent. %s will receive %s %s from %s.",
string(data[common.DATA_TEMPORARY_VALUE]),
string(data[common.DATA_AMOUNT]),
string(data[common.DATA_ACTIVE_SYM]),
sessionId,
)
res.FlagReset = append(res.FlagReset, account_authorized_flag)
res.FlagReset = append(res.FlagReset, flag_account_authorized)
return res, nil
}