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317 lines
11 KiB
317 lines
11 KiB
package services
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import (
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"context"
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"encoding/json"
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"fmt"
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"math/big"
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"github.com/coinbase/rosetta-sdk-go/types"
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ethCommon "github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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ethRpc "github.com/ethereum/go-ethereum/rpc"
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"github.com/pkg/errors"
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"github.com/harmony-one/harmony/core/vm"
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"github.com/harmony-one/harmony/internal/params"
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"github.com/harmony-one/harmony/rosetta/common"
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"github.com/harmony-one/harmony/rpc"
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)
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// ConstructMetadataOptions is constructed by ConstructionPreprocess for ConstructionMetadata options
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type ConstructMetadataOptions struct {
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TransactionMetadata *TransactionMetadata `json:"transaction_metadata"`
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OperationType string `json:"operation_type,omitempty"`
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GasPriceMultiplier *float64 `json:"gas_price_multiplier,omitempty"`
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}
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// UnmarshalFromInterface ..
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func (m *ConstructMetadataOptions) UnmarshalFromInterface(metadata interface{}) error {
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var T ConstructMetadataOptions
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dat, err := json.Marshal(metadata)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(dat, &T); err != nil {
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return err
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}
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if T.TransactionMetadata == nil {
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return fmt.Errorf("transaction metadata is required")
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}
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if T.OperationType == "" {
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return fmt.Errorf("operation type is required")
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}
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*m = T
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return nil
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}
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// ConstructionPreprocess implements the /construction/preprocess endpoint.
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// Note that `request.MaxFee` is never considered for this construction implementation.
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func (s *ConstructAPI) ConstructionPreprocess(
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ctx context.Context, request *types.ConstructionPreprocessRequest,
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) (*types.ConstructionPreprocessResponse, *types.Error) {
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if err := assertValidNetworkIdentifier(request.NetworkIdentifier, s.hmy.ShardID); err != nil {
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return nil, err
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}
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txMetadata := &TransactionMetadata{}
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if request.Metadata != nil {
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if err := txMetadata.UnmarshalFromInterface(request.Metadata); err != nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": errors.WithMessage(err, "invalid transaction metadata").Error(),
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})
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}
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}
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if txMetadata.FromShardID != nil && *txMetadata.FromShardID != s.hmy.ShardID {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": fmt.Sprintf("expect from shard ID to be %v", s.hmy.ShardID),
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})
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}
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components, rosettaError := GetOperationComponents(request.Operations)
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if rosettaError != nil {
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return nil, rosettaError
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}
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if components.From == nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": "sender address is not found for given operations",
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})
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}
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if txMetadata.ToShardID != nil && txMetadata.FromShardID != nil &&
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components.Type != common.NativeCrossShardTransferOperation && *txMetadata.ToShardID != *txMetadata.FromShardID {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": "given from & to shard are different for a native same shard transfer",
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})
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}
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if request.SuggestedFeeMultiplier != nil && *request.SuggestedFeeMultiplier < 1 {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": "given gas price multiplier must be at least 1",
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})
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}
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options, err := types.MarshalMap(ConstructMetadataOptions{
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TransactionMetadata: txMetadata,
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OperationType: components.Type,
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GasPriceMultiplier: request.SuggestedFeeMultiplier,
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})
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if err != nil {
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return nil, common.NewError(common.CatchAllError, map[string]interface{}{
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"message": err.Error(),
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})
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}
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if _, err := getAddress(components.From); err != nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": err.Error(),
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})
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}
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return &types.ConstructionPreprocessResponse{
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Options: options,
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RequiredPublicKeys: []*types.AccountIdentifier{
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components.From,
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},
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}, nil
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}
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// ConstructMetadata with a set of operations will construct a valid transaction
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type ConstructMetadata struct {
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Nonce uint64 `json:"nonce"`
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GasLimit uint64 `json:"gas_limit"`
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GasPrice *big.Int `json:"gas_price"`
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ContractCode hexutil.Bytes `json:"contract_code"`
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EvmReturn hexutil.Bytes `json:"evm_return"`
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EvmErrorMessage string `json:"evm_error_message"`
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Transaction *TransactionMetadata `json:"transaction_metadata"`
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}
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// UnmarshalFromInterface ..
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func (m *ConstructMetadata) UnmarshalFromInterface(blockArgs interface{}) error {
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var T ConstructMetadata
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dat, err := json.Marshal(blockArgs)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(dat, &T); err != nil {
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return err
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}
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if T.GasPrice == nil {
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return fmt.Errorf("gas price is required")
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}
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if T.Transaction == nil {
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return fmt.Errorf("transaction metadata is required")
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}
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*m = T
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return nil
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}
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// ConstructionMetadata implements the /construction/metadata endpoint.
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func (s *ConstructAPI) ConstructionMetadata(
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ctx context.Context, request *types.ConstructionMetadataRequest,
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) (*types.ConstructionMetadataResponse, *types.Error) {
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if err := assertValidNetworkIdentifier(request.NetworkIdentifier, s.hmy.ShardID); err != nil {
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return nil, err
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}
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options := &ConstructMetadataOptions{}
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if err := options.UnmarshalFromInterface(request.Options); err != nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": errors.WithMessage(err, "invalid metadata option(s)").Error(),
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})
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}
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if len(request.PublicKeys) != 1 {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": "require sender public key only",
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})
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}
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senderAddr, rosettaError := getAddressFromPublicKey(request.PublicKeys[0])
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if rosettaError != nil {
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return nil, rosettaError
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}
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nonce, err := s.hmy.GetPoolNonce(ctx, *senderAddr)
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if err != nil {
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return nil, common.NewError(common.CatchAllError, map[string]interface{}{
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"message": err.Error(),
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})
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}
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currBlock, err := s.hmy.BlockByNumber(ctx, ethRpc.LatestBlockNumber)
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if err != nil {
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return nil, common.NewError(common.CatchAllError, map[string]interface{}{
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"message": err.Error(),
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})
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}
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if options.OperationType == common.NativeCrossShardTransferOperation &&
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!s.hmy.BlockChain.Config().AcceptsCrossTx(currBlock.Epoch()) {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": "cross-shard transaction is not accepted yet",
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})
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}
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data := hexutil.Bytes{}
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if options.TransactionMetadata.Data != nil {
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var err error
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if data, err = hexutil.Decode(*options.TransactionMetadata.Data); err != nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": errors.WithMessage(err, "invalid tx data format").Error(),
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})
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}
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}
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var contractAddress ethCommon.Address
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if options.TransactionMetadata.ContractAccountIdentifier != nil {
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contractAddress, err = getAddress(options.TransactionMetadata.ContractAccountIdentifier)
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if err != nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": errors.WithMessage(err, "unable to get provided contract address").Error(),
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})
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}
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}
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state, _, err := s.hmy.StateAndHeaderByNumber(ctx, ethRpc.LatestBlockNumber)
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if state == nil || err != nil {
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return nil, common.NewError(common.BlockNotFoundError, map[string]interface{}{
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"message": "block state not found for latest block",
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})
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}
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var estGasUsed uint64
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if !isStakingOperation(options.OperationType) {
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if options.OperationType == common.ContractCreationOperation {
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estGasUsed, err = rpc.EstimateGas(ctx, s.hmy, rpc.CallArgs{From: senderAddr, Data: &data}, nil)
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estGasUsed *= 2 // HACK to account for imperfect contract creation estimation
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} else {
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estGasUsed, err = rpc.EstimateGas(
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ctx, s.hmy, rpc.CallArgs{From: senderAddr, To: &contractAddress, Data: &data}, nil,
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)
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}
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} else {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": "staking operations are not supported",
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})
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}
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if err != nil {
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return nil, common.NewError(common.InvalidTransactionConstructionError, map[string]interface{}{
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"message": errors.WithMessage(err, "invalid transaction data").Error(),
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})
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}
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gasMul := float64(1)
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if options.GasPriceMultiplier != nil && *options.GasPriceMultiplier > 1 {
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gasMul = *options.GasPriceMultiplier
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}
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sugNativeFee, sugNativePrice := getSuggestedNativeFeeAndPrice(gasMul, new(big.Int).SetUint64(estGasUsed))
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evmErrorMsg := ""
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evmReturn := hexutil.Bytes{}
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if !isStakingOperation(options.OperationType) &&
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options.OperationType != common.ContractCreationOperation &&
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len(data) > 0 {
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gas := hexutil.Uint64(estGasUsed)
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callArgs := rpc.CallArgs{
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From: senderAddr,
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To: &contractAddress,
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Data: &data,
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Gas: &gas,
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}
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evmExe, err := rpc.DoEVMCall(
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ctx, s.hmy, callArgs, ethRpc.LatestBlockNumber, vm.Config{}, rpc.CallTimeout, s.hmy.RPCGasCap,
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)
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if err != nil {
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return nil, common.NewError(common.CatchAllError, map[string]interface{}{
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"message": errors.WithMessage(err, "unable to execute EVM").Error(),
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})
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}
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if evmExe.VMErr != nil {
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evmErrorMsg = evmExe.VMErr.Error()
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}
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evmReturn = evmExe.ReturnData
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sugNativeFee, sugNativePrice = getSuggestedNativeFeeAndPrice(gasMul, new(big.Int).SetUint64(evmExe.UsedGas))
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}
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metadata, err := types.MarshalMap(ConstructMetadata{
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Nonce: nonce,
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GasPrice: sugNativePrice,
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GasLimit: estGasUsed,
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Transaction: options.TransactionMetadata,
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ContractCode: state.GetCode(contractAddress),
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EvmErrorMessage: evmErrorMsg,
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EvmReturn: evmReturn,
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})
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if err != nil {
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return nil, common.NewError(common.CatchAllError, map[string]interface{}{
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"message": err.Error(),
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})
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}
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return &types.ConstructionMetadataResponse{
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Metadata: metadata,
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SuggestedFee: sugNativeFee,
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}, nil
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}
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// getSuggestedNativeFeeAndPrice ..
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func getSuggestedNativeFeeAndPrice(
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gasMul float64, estGasUsed *big.Int,
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) ([]*types.Amount, *big.Int) {
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if estGasUsed == nil {
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estGasUsed = big.NewInt(0).SetUint64(params.TxGas)
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}
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if gasMul < 1 {
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gasMul = 1
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}
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gasPriceFloat := big.NewFloat(0).Mul(big.NewFloat(DefaultGasPrice), big.NewFloat(gasMul))
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gasPriceTruncated, _ := gasPriceFloat.Uint64()
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gasPrice := new(big.Int).SetUint64(gasPriceTruncated)
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return []*types.Amount{
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{
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Value: fmt.Sprintf("%v", new(big.Int).Mul(gasPrice, estGasUsed)),
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Currency: &common.NativeCurrency,
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},
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}, gasPrice
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}
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// isStakingOperation ..
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func isStakingOperation(op string) bool {
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for _, stakingOp := range common.StakingOperationTypes {
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if stakingOp == op {
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return true
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}
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}
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return false
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}
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