cic-custodial/internal/tasker/task/sign_transfer.go

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package task
import (
"context"
"encoding/json"
"fmt"
"math/big"
"github.com/celo-org/celo-blockchain/common/hexutil"
"github.com/grassrootseconomics/celoutils"
"github.com/grassrootseconomics/cic-custodial/internal/custodial"
"github.com/grassrootseconomics/cic-custodial/internal/events"
"github.com/grassrootseconomics/cic-custodial/internal/store"
"github.com/grassrootseconomics/cic-custodial/internal/tasker"
"github.com/grassrootseconomics/w3-celo-patch"
"github.com/hibiken/asynq"
)
type (
TransferPayload struct {
TrackingId string `json:"trackingId"`
From string `json:"from" `
To string `json:"to"`
VoucherAddress string `json:"voucherAddress"`
Amount int64 `json:"amount"`
}
transferEventPayload struct {
DispatchTaskId string `json:"dispatchTaskId"`
OTXId uint `json:"otxId"`
TrackingId string `json:"trackingId"`
TxHash string `json:"txHash"`
}
)
func SignTransfer(cu *custodial.Custodial) func(context.Context, *asynq.Task) error {
return func(ctx context.Context, t *asynq.Task) error {
var (
payload TransferPayload
)
if err := json.Unmarshal(t.Payload(), &payload); err != nil {
return fmt.Errorf("account: failed %v: %w", err, asynq.SkipRetry)
}
lock, err := cu.LockProvider.Obtain(
ctx,
cu.SystemContainer.LockPrefix+payload.From,
cu.SystemContainer.LockTimeout,
nil,
)
if err != nil {
return err
}
defer lock.Release(ctx)
key, err := cu.Keystore.LoadPrivateKey(ctx, payload.From)
if err != nil {
return err
}
nonce, err := cu.Noncestore.Acquire(ctx, payload.From)
if err != nil {
return err
}
defer func() {
if err != nil {
if nErr := cu.Noncestore.Return(ctx, cu.SystemContainer.PublicKey); nErr != nil {
err = nErr
}
}
}()
input, err := cu.SystemContainer.Abis["transfer"].EncodeArgs(w3.A(payload.To), big.NewInt(payload.Amount))
if err != nil {
return err
}
// TODO: Review gas params.
builtTx, err := cu.CeloProvider.SignContractExecutionTx(
key,
celoutils.ContractExecutionTxOpts{
ContractAddress: w3.A(payload.VoucherAddress),
InputData: input,
GasFeeCap: celoutils.SafeGasFeeCap,
GasTipCap: celoutils.SafeGasTipCap,
GasLimit: cu.SystemContainer.TokenTransferGasLimit,
Nonce: nonce,
},
)
if err != nil {
return err
}
rawTx, err := builtTx.MarshalBinary()
if err != nil {
return err
}
id, err := cu.PgStore.CreateOTX(ctx, store.OTX{
TrackingId: payload.TrackingId,
Type: "TRANSFER",
RawTx: hexutil.Encode(rawTx),
TxHash: builtTx.Hash().Hex(),
From: payload.From,
Data: hexutil.Encode(builtTx.Data()),
GasPrice: builtTx.GasPrice().Uint64(),
Nonce: builtTx.Nonce(),
})
if err != nil {
return err
}
disptachJobPayload, err := json.Marshal(TxPayload{
OtxId: id,
Tx: builtTx,
})
if err != nil {
return err
}
_, err = cu.TaskerClient.CreateTask(
tasker.DispatchTxTask,
tasker.HighPriority,
&tasker.Task{
Payload: disptachJobPayload,
},
)
if err != nil {
return err
}
gasRefillPayload, err := json.Marshal(AccountPayload{
PublicKey: payload.From,
})
if err != nil {
return err
}
_, err = cu.TaskerClient.CreateTask(
tasker.AccountRefillGasTask,
tasker.DefaultPriority,
&tasker.Task{
Payload: gasRefillPayload,
},
)
if err != nil {
return err
}
eventPayload := &transferEventPayload{
OTXId: id,
TrackingId: payload.TrackingId,
TxHash: builtTx.Hash().Hex(),
}
if err := cu.EventEmitter.Publish(
events.SignTransfer,
builtTx.Hash().Hex(),
eventPayload,
); err != nil {
return err
}
return nil
}
}