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transfer.go
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transfer.go
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// Copyright (c) 2019 IoTeX Foundation
// This is an alpha (internal) release and is not suitable for production. This source code is provided 'as is' and no
// warranties are given as to title or non-infringement, merchantability or fitness for purpose and, to the extent
// permitted by law, all liability for your use of the code is disclaimed. This source code is governed by Apache
// License 2.0 that can be found in the LICENSE file.
package account
import (
"context"
"math/big"
"github.com/iotexproject/go-pkgs/hash"
"github.com/iotexproject/iotex-address/address"
"github.com/pkg/errors"
"github.com/iotexproject/iotex-core/action"
"github.com/iotexproject/iotex-core/action/protocol"
accountutil "github.com/iotexproject/iotex-core/action/protocol/account/util"
"github.com/iotexproject/iotex-core/blockchain/genesis"
"github.com/iotexproject/iotex-core/state"
"github.com/iotexproject/iotex-proto/golang/iotextypes"
)
// TransferSizeLimit is the maximum size of transfer allowed
const TransferSizeLimit = 32 * 1024
// handleTransfer handles a transfer
func (p *Protocol) handleTransfer(ctx context.Context, act action.Action, sm protocol.StateManager) (*action.Receipt, error) {
actionCtx := protocol.MustGetActionCtx(ctx)
g := genesis.MustExtractGenesisContext(ctx)
blkCtx := protocol.MustGetBlockCtx(ctx)
tsf, ok := act.(*action.Transfer)
if !ok {
return nil, nil
}
// check sender
sender, err := accountutil.LoadOrCreateAccount(sm, actionCtx.Caller.String())
if err != nil {
return nil, errors.Wrapf(err, "failed to load or create the account of sender %s", actionCtx.Caller.String())
}
gasFee := big.NewInt(0).Mul(tsf.GasPrice(), big.NewInt(0).SetUint64(actionCtx.IntrinsicGas))
if big.NewInt(0).Add(tsf.Amount(), gasFee).Cmp(sender.Balance) == 1 {
return nil, errors.Wrapf(
state.ErrNotEnoughBalance,
"sender %s balance %s, required amount %s",
actionCtx.Caller.String(),
sender.Balance,
big.NewInt(0).Add(tsf.Amount(), gasFee),
)
}
var depositLog *action.TransactionLog
if !g.IsPacific(blkCtx.BlockHeight) {
// charge sender gas
if err := sender.SubBalance(gasFee); err != nil {
return nil, errors.Wrapf(err, "failed to charge the gas for sender %s", actionCtx.Caller.String())
}
if p.depositGas != nil {
depositLog, err = p.depositGas(ctx, sm, gasFee)
if err != nil {
return nil, err
}
}
}
recipientAddr, err := address.FromString(tsf.Recipient())
if err != nil {
return nil, errors.Wrapf(err, "failed to decode recipient address %s", tsf.Recipient())
}
recipientAcct, err := accountutil.LoadAccount(sm, hash.BytesToHash160(recipientAddr.Bytes()))
if err == nil && recipientAcct.IsContract() {
// update sender Nonce
accountutil.SetNonce(tsf, sender)
// put updated sender's state to trie
if err := accountutil.StoreAccount(sm, actionCtx.Caller, sender); err != nil {
return nil, errors.Wrap(err, "failed to update pending account changes to trie")
}
if g.IsPacific(blkCtx.BlockHeight) {
if p.depositGas != nil {
depositLog, err = p.depositGas(ctx, sm, gasFee)
if err != nil {
return nil, err
}
}
}
receipt := &action.Receipt{
Status: uint64(iotextypes.ReceiptStatus_Failure),
BlockHeight: blkCtx.BlockHeight,
ActionHash: actionCtx.ActionHash,
GasConsumed: actionCtx.IntrinsicGas,
ContractAddress: p.addr.String(),
}
receipt.AddTransactionLogs(depositLog)
return receipt, nil
}
// update sender Balance
if err := sender.SubBalance(tsf.Amount()); err != nil {
return nil, errors.Wrapf(err, "failed to update the Balance of sender %s", actionCtx.Caller.String())
}
// update sender Nonce
accountutil.SetNonce(tsf, sender)
// put updated sender's state to trie
if err := accountutil.StoreAccount(sm, actionCtx.Caller, sender); err != nil {
return nil, errors.Wrap(err, "failed to update pending account changes to trie")
}
// check recipient
recipient, err := accountutil.LoadOrCreateAccount(sm, tsf.Recipient())
if err != nil {
return nil, errors.Wrapf(err, "failed to load or create the account of recipient %s", tsf.Recipient())
}
if err := recipient.AddBalance(tsf.Amount()); err != nil {
return nil, errors.Wrapf(err, "failed to update the Balance of recipient %s", tsf.Recipient())
}
// put updated recipient's state to trie
if err := accountutil.StoreAccount(sm, recipientAddr, recipient); err != nil {
return nil, errors.Wrap(err, "failed to update pending account changes to trie")
}
if g.IsPacific(blkCtx.BlockHeight) {
if p.depositGas != nil {
depositLog, err = p.depositGas(ctx, sm, gasFee)
if err != nil {
return nil, err
}
}
}
receipt := &action.Receipt{
Status: uint64(iotextypes.ReceiptStatus_Success),
BlockHeight: blkCtx.BlockHeight,
ActionHash: actionCtx.ActionHash,
GasConsumed: actionCtx.IntrinsicGas,
ContractAddress: p.addr.String(),
}
receipt.AddTransactionLogs(&action.TransactionLog{
Type: iotextypes.TransactionLogType_NATIVE_TRANSFER,
Sender: actionCtx.Caller.String(),
Recipient: tsf.Recipient(),
Amount: tsf.Amount(),
}, depositLog)
return receipt, nil
}
// validateTransfer validates a transfer
func (p *Protocol) validateTransfer(_ context.Context, act action.Action) error {
tsf, ok := act.(*action.Transfer)
if !ok {
return nil
}
// Reject oversized transfer
if tsf.TotalSize() > TransferSizeLimit {
return errors.Wrap(action.ErrActPool, "oversized data")
}
return nil
}