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batch.go
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batch.go
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package types
import (
"fmt"
"math/big"
sdkerrors "cosmossdk.io/errors"
"cosmossdk.io/math"
"github.com/VolumeFi/whoops"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/ethereum/go-ethereum/accounts/abi"
gethcommon "github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
func (o OutgoingTransferTx) ToInternal() (*InternalOutgoingTransferTx, error) {
return NewInternalOutgoingTransferTx(o.Id, o.Sender, o.DestAddress,
o.Erc20Token, o.BridgeTaxAmount)
}
// InternalOutgoingTransferTx is an internal duplicate of OutgoingTransferTx with validation
type InternalOutgoingTransferTx struct {
Id uint64
Sender sdk.AccAddress
DestAddress *EthAddress
Erc20Token *InternalERC20Token
BridgeTaxAmount math.Int
}
func NewInternalOutgoingTransferTx(
id uint64,
sender string,
destAddress string,
erc20Token ERC20Token,
bridgeTaxAmount math.Int,
) (*InternalOutgoingTransferTx, error) {
send, err := sdk.AccAddressFromBech32(sender)
if err != nil {
return nil, sdkerrors.Wrap(err, "invalid sender")
}
dest, err := NewEthAddress(destAddress)
if err != nil {
return nil, sdkerrors.Wrap(err, "invalid eth destination")
}
token, err := erc20Token.ToInternal()
if err != nil {
return nil, sdkerrors.Wrap(err, "invalid Erc20Token")
}
return &InternalOutgoingTransferTx{
Id: id,
Sender: send,
DestAddress: dest,
Erc20Token: token,
BridgeTaxAmount: bridgeTaxAmount,
}, nil
}
func (i InternalOutgoingTransferTx) ToExternal() OutgoingTransferTx {
return OutgoingTransferTx{
Id: i.Id,
Sender: i.Sender.String(),
DestAddress: i.DestAddress.GetAddress().Hex(),
Erc20Token: i.Erc20Token.ToExternal(),
BridgeTaxAmount: i.BridgeTaxAmount,
}
}
func (i InternalOutgoingTransferTx) ValidateBasic() error {
err := i.DestAddress.ValidateBasic()
if err != nil {
return sdkerrors.Wrap(err, "invalid DestAddress")
}
err = i.Erc20Token.ValidateBasic()
if err != nil {
return sdkerrors.Wrap(err, "invalid Erc20Token")
}
return nil
}
// InternalOutgoingTxBatches is an internal duplicate array of OutgoingTxBatch with validation
type InternalOutgoingTxBatches []InternalOutgoingTxBatch
// InternalOutgoingTxBatch is an internal duplicate of OutgoingTxBatch with validation
type InternalOutgoingTxBatch struct {
BatchNonce uint64
BatchTimeout uint64
Transactions []*InternalOutgoingTransferTx
TokenContract EthAddress
PalomaBlockCreated uint64
ChainReferenceID string
BytesToSign []byte
Assignee string
}
func NewInternalOutgingTxBatch(
nonce uint64,
timeout uint64,
transactions []*InternalOutgoingTransferTx,
contract EthAddress,
blockCreated uint64,
chainReferenceID string,
turnstoneID string,
assignee string,
) (*InternalOutgoingTxBatch, error) {
ret := &InternalOutgoingTxBatch{
BatchNonce: nonce,
BatchTimeout: timeout,
Transactions: transactions,
TokenContract: contract,
PalomaBlockCreated: blockCreated,
ChainReferenceID: chainReferenceID,
Assignee: assignee,
}
bytesToSign, err := ret.GetCheckpoint(turnstoneID)
if err != nil {
return nil, err
}
ret.BytesToSign = bytesToSign
if err := ret.ValidateBasic(); err != nil {
return nil, err
}
return ret, nil
}
func NewInternalOutgingTxBatchFromExternalBatch(batch OutgoingTxBatch) (*InternalOutgoingTxBatch, error) {
contractAddr, err := NewEthAddress(batch.TokenContract)
if err != nil {
return nil, sdkerrors.Wrap(err, "invalid eth address")
}
txs := make([]*InternalOutgoingTransferTx, len(batch.Transactions))
for i, tx := range batch.Transactions {
intTx, err := tx.ToInternal()
if err != nil {
return nil, sdkerrors.Wrapf(err, "invalid transaction in batch: %v", tx)
}
txs[i] = intTx
}
intBatch := InternalOutgoingTxBatch{
BatchNonce: batch.BatchNonce,
BatchTimeout: batch.BatchTimeout,
Transactions: txs,
TokenContract: *contractAddr,
PalomaBlockCreated: batch.PalomaBlockCreated,
ChainReferenceID: batch.ChainReferenceId,
BytesToSign: batch.BytesToSign,
Assignee: batch.Assignee,
}
return &intBatch, nil
}
func (o *OutgoingTxBatch) ToInternal() (*InternalOutgoingTxBatch, error) {
return NewInternalOutgingTxBatchFromExternalBatch(*o)
}
func (i *InternalOutgoingTxBatch) ToExternal() OutgoingTxBatch {
txs := make([]OutgoingTransferTx, len(i.Transactions))
for i, tx := range i.Transactions {
txs[i] = tx.ToExternal()
}
return OutgoingTxBatch{
BatchNonce: i.BatchNonce,
BatchTimeout: i.BatchTimeout,
Transactions: txs,
TokenContract: i.TokenContract.GetAddress().Hex(),
PalomaBlockCreated: i.PalomaBlockCreated,
ChainReferenceId: i.ChainReferenceID,
BytesToSign: i.BytesToSign,
Assignee: i.Assignee,
}
}
func (i *InternalOutgoingTxBatches) ToExternalArray() []OutgoingTxBatch {
var arr []OutgoingTxBatch
for index, val := range *i {
txs := make([]OutgoingTransferTx, len((*i)[index].Transactions))
for i, tx := range (*i)[index].Transactions {
txs[i] = tx.ToExternal()
}
arr = append(arr, OutgoingTxBatch{
BatchNonce: val.BatchNonce,
BatchTimeout: val.BatchTimeout,
Transactions: txs,
TokenContract: val.TokenContract.GetAddress().Hex(),
PalomaBlockCreated: val.PalomaBlockCreated,
ChainReferenceId: val.ChainReferenceID,
BytesToSign: val.BytesToSign,
Assignee: val.Assignee,
})
}
return arr
}
func (i *InternalOutgoingTxBatch) ValidateBasic() error {
if err := i.TokenContract.ValidateBasic(); err != nil {
return sdkerrors.Wrap(err, "invalid eth address")
}
for i, tx := range i.Transactions {
if err := tx.ValidateBasic(); err != nil {
return sdkerrors.Wrapf(err, "transaction %d is invalid", i)
}
}
return nil
}
// GetChainReferenceID is required for EthereumSigned interface
func (o OutgoingTxBatch) GetChainReferenceID() string {
return o.ChainReferenceId
}
// GetCheckpoint is required for EthereumSigned interface
func (o OutgoingTxBatch) GetCheckpoint(turnstoneID string) ([]byte, error) {
i, err := o.ToInternal()
if err != nil {
return nil, sdkerrors.Wrap(err, "invalid OutgoingTxBatch")
}
return i.GetCheckpoint(turnstoneID)
}
func (i InternalOutgoingTxBatch) GetChainReferenceID() string {
return i.ChainReferenceID
}
// GetCheckpoint gets the checkpoint signature from the given outgoing tx batch
func (i InternalOutgoingTxBatch) GetCheckpoint(turnstoneID string) ([]byte, error) {
arguments := abi.Arguments{
// token
{Type: whoops.Must(abi.NewType("address", "", nil))},
// args
{Type: whoops.Must(abi.NewType("tuple", "", []abi.ArgumentMarshaling{
{Name: "receiver", Type: "address[]"},
{Name: "amount", Type: "uint256[]"},
}))},
// batch Nonce
{Type: whoops.Must(abi.NewType("uint256", "", nil))},
// turnstone id
{Type: whoops.Must(abi.NewType("bytes32", "", nil))},
// deadline
{Type: whoops.Must(abi.NewType("uint256", "", nil))},
}
var turnstoneBytes32 [32]byte
copy(turnstoneBytes32[:], turnstoneID)
method := abi.NewMethod("batch_call", "batch_call", abi.Function, "", false, false, arguments, abi.Arguments{})
methodNameBytes := []uint8("batch_call")
var batchMethodName [32]uint8
copy(batchMethodName[:], methodNameBytes)
// Run through the elements of the batch and serialize them
txAmounts := make([]*big.Int, len(i.Transactions))
txDestinations := make([]gethcommon.Address, len(i.Transactions))
for j, tx := range i.Transactions {
txAmounts[j] = tx.Erc20Token.Amount.BigInt()
txDestinations[j] = tx.DestAddress.GetAddress()
}
args := struct {
Receiver []gethcommon.Address
Amount []*big.Int
}{
Receiver: txDestinations,
Amount: txAmounts,
}
abiEncodedBatch, err := arguments.Pack(
i.TokenContract.GetAddress(),
args,
big.NewInt(int64(i.BatchNonce)),
turnstoneBytes32,
big.NewInt(int64(i.BatchTimeout)),
)
// this should never happen outside of test since any case that could crash on encoding
// should be filtered above.
if err != nil {
return nil, sdkerrors.Wrap(err, fmt.Sprintf("Error packing checkpoint! %s/n", err))
}
abiEncodedBatch = append(method.ID[:], abiEncodedBatch...)
return crypto.Keccak256(abiEncodedBatch), nil
}