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contract.go
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contract.go
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package keeper
import (
"fmt"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/datachainlab/cross/x/core/contract/types"
txtypes "github.com/datachainlab/cross/x/core/tx/types"
crosstypes "github.com/datachainlab/cross/x/core/types"
)
type contractManager struct {
cdc codec.Codec
storeKey sdk.StoreKey
mod types.ContractModule
commitStore types.CommitStoreI
resolverProvider txtypes.CallResolverProvider
contractHandleDecorator types.ContractHandleDecorator
}
var _ txtypes.ContractManager = (*contractManager)(nil)
func NewContractManager(
cdc codec.Codec,
storeKey sdk.StoreKey,
mod types.ContractModule,
commitStore types.CommitStoreI,
contractHandleDecorator types.ContractHandleDecorator,
) txtypes.ContractManager {
return contractManager{
cdc: cdc,
storeKey: storeKey,
mod: mod,
commitStore: commitStore,
resolverProvider: txtypes.DefaultCallResolverProvider(),
contractHandleDecorator: contractHandleDecorator,
}
}
func (k contractManager) PrepareCommit(
ctx sdk.Context,
txID crosstypes.TxID,
txIndex crosstypes.TxIndex,
tx txtypes.ResolvedContractTransaction,
) (*txtypes.ContractCallResult, error) {
ctx, err := k.setupContext(ctx, tx, types.AtomicMode)
if err != nil {
return nil, err
}
res, err := k.processTransaction(ctx, tx)
if err != nil {
return nil, err
}
if err := k.commitStore.Precommit(ctx, makeContractTransactionID(txID, txIndex)); err != nil {
return nil, err
}
k.setContractCallResult(ctx, txID, txIndex, *res)
return res, nil
}
func (k contractManager) setupContext(
ctx sdk.Context,
tx txtypes.ResolvedContractTransaction,
commitMode types.CommitMode,
) (sdk.Context, error) {
rs, err := k.resolverProvider(k.cdc, tx.UnpackCallResults(k.cdc))
if err != nil {
return ctx, err
}
// Setup a context
ctx = types.SetupContractContext(
ctx,
types.ContractRuntimeInfo{
CommitMode: commitMode,
ExternalCallResolver: rs,
},
)
goCtx, err := k.contractHandleDecorator.Handle(ctx.Context(), tx.CallInfo)
if err != nil {
return ctx, err
}
return ctx.WithContext(goCtx), nil
}
func (k contractManager) processTransaction(
ctx sdk.Context,
tx txtypes.ResolvedContractTransaction,
) (res *txtypes.ContractCallResult, err error) {
defer func() {
if r := recover(); r != nil {
if e, ok := r.(error); ok {
err = types.NewErrContractCall(e)
} else {
err = types.NewErrContractCall(fmt.Errorf("type=%T value=%#v", e, e))
}
}
}()
res, err = k.mod.OnContractCall(
sdk.WrapSDKContext(ctx),
tx.Signers,
tx.CallInfo,
)
if err != nil {
return nil, err
}
if !tx.ReturnValue.IsNil() && !tx.ReturnValue.Equal(txtypes.NewReturnValue(res.GetData())) {
return nil, fmt.Errorf("unexpected return-value: expected='%X' actual='%X'", *tx.ReturnValue, res.GetData())
}
return res, nil
}
func (k contractManager) CommitImmediately(
ctx sdk.Context,
txID crosstypes.TxID,
txIndex crosstypes.TxIndex,
tx txtypes.ResolvedContractTransaction,
) (*txtypes.ContractCallResult, error) {
ctx, err := k.setupContext(ctx, tx, types.BasicMode)
if err != nil {
return nil, err
}
res, err := k.processTransaction(ctx, tx)
if err != nil {
return nil, err
}
k.commitStore.CommitImmediately(ctx)
return res, nil
}
// Commit commits the transaction
func (k contractManager) Commit(
ctx sdk.Context,
txID crosstypes.TxID,
txIndex crosstypes.TxIndex,
) (*txtypes.ContractCallResult, error) {
if err := k.commitStore.Commit(ctx, makeContractTransactionID(txID, txIndex)); err != nil {
return nil, err
}
res := k.getContractCallResult(ctx, txID, txIndex)
// TODO calls OnCommit handler
k.removeContractCallResult(ctx, txID, txIndex)
return res, nil
}
// Abort aborts the transaction
func (k contractManager) Abort(
ctx sdk.Context,
txID crosstypes.TxID,
txIndex crosstypes.TxIndex,
) error {
if err := k.commitStore.Abort(ctx, makeContractTransactionID(txID, txIndex)); err != nil {
return err
}
// TODO calls OnAbort handler
k.removeContractCallResult(ctx, txID, txIndex)
return nil
}