package task import ( "context" "encoding/json" "fmt" "math/big" "github.com/bsm/redislock" "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/pub" "github.com/grassrootseconomics/cic-custodial/internal/store" "github.com/grassrootseconomics/cic-custodial/internal/tasker" "github.com/grassrootseconomics/cic-custodial/pkg/enum" "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 uint64 `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 ( err error 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, lockPrefix+payload.From, cu.SystemContainer.LockTimeout, &redislock.Options{ RetryStrategy: lockRetry(), }, ) 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), new(big.Int).SetUint64(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: enum.TRANSFER_VOUCHER, RawTx: hexutil.Encode(rawTx), TxHash: builtTx.Hash().Hex(), From: payload.From, Data: hexutil.Encode(builtTx.Data()), GasPrice: builtTx.GasPrice().Uint64(), GasLimit: builtTx.Gas(), TransferValue: payload.Amount, 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( ctx, tasker.DispatchTxTask, tasker.HighPriority, &tasker.Task{ Payload: disptachJobPayload, }, ) if err != nil { return err } gasRefillPayload, err := json.Marshal(AccountPayload{ PublicKey: payload.From, TrackingId: payload.TrackingId, }) if err != nil { return err } _, err = cu.TaskerClient.CreateTask( ctx, 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.Pub.Publish( pub.SignTransfer, builtTx.Hash().Hex(), eventPayload, ); err != nil { return err } return nil } }