[#3] policy: Introduce policy contract interface wrapper

Signed-off-by: Airat Arifullin <aarifullin@yadro.com>

go.mod

@@ -3,15 +3,26 @@ module git.frostfs.info/TrueCloudLab/policy-engine
 go 1.20
 
 require (
+	git.frostfs.info/TrueCloudLab/frostfs-contract v0.18.1-0.20231129062201-a1b61d394958
+	github.com/mr-tron/base58 v1.2.0
 	github.com/nspcc-dev/neo-go v0.103.0
 	github.com/stretchr/testify v1.8.4
 )
 
+require (
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/hashicorp/golang-lru v0.6.0 // indirect
+	github.com/nspcc-dev/go-ordered-json v0.0.0-20220111165707-25110be27d22 // indirect
+	github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231020160724-c3955f87d1b5 // indirect
+	github.com/nspcc-dev/rfc6979 v0.2.0 // indirect
+	golang.org/x/crypto v0.14.0 // indirect
+	golang.org/x/sync v0.3.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+)
+
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/kr/pretty v0.1.0 // indirect
-	github.com/kr/text v0.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,21 +1,43 @@
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+git.frostfs.info/TrueCloudLab/frostfs-contract v0.18.1-0.20231129062201-a1b61d394958 h1:X9yPizADIhD3K/gdKVCthlAnf9aQ3UJJGnZgIwwixRQ=
+git.frostfs.info/TrueCloudLab/frostfs-contract v0.18.1-0.20231129062201-a1b61d394958/go.mod h1:rQWdsG18NaiFvkJpMguJev913KD/yleHaniRBkUyt0o=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 h1:YLtO71vCjJRCBcrPMtQ9nqBsqpA1m5sE92cU+pd5Mcc=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeCxkaw7y45JueMRL4DIyJDKs=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
-github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
-github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/hashicorp/golang-lru v0.6.0 h1:uL2shRDx7RTrOrTCUZEGP/wJUFiUI8QT6E7z5o8jga4=
+github.com/hashicorp/golang-lru v0.6.0/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
+github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
+github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
+github.com/nspcc-dev/go-ordered-json v0.0.0-20220111165707-25110be27d22 h1:n4ZaFCKt1pQJd7PXoMJabZWK9ejjbLOVrkl/lOUmshg=
+github.com/nspcc-dev/go-ordered-json v0.0.0-20220111165707-25110be27d22/go.mod h1:79bEUDEviBHJMFV6Iq6in57FEOCMcRhfQnfaf0ETA5U=
 github.com/nspcc-dev/neo-go v0.103.0 h1:UVyWPhzZdfYFG35ORP3FRDLh8J/raRQ6m8SptDdlgfM=
 github.com/nspcc-dev/neo-go v0.103.0/go.mod h1:x+wmcYqpZYJwLp1l/pHZrqNp3RSWlkMymWGDij3/OPo=
+github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231020160724-c3955f87d1b5 h1:09CpI5uwsxb1EeFPIKQRwwWlfCmDD/Dwwh01lPiQScM=
+github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231020160724-c3955f87d1b5/go.mod h1:J/Mk6+nKeKSW4wygkZQFLQ6SkLOSGX5Ga0RuuuktEag=
+github.com/nspcc-dev/rfc6979 v0.2.0 h1:3e1WNxrN60/6N0DW7+UYisLeZJyfqZTNOjeV/toYvOE=
+github.com/nspcc-dev/rfc6979 v0.2.0/go.mod h1:exhIh1PdpDC5vQmyEsGvc4YDM/lyQp/452QxGq/UEso=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/syndtr/goleveldb v1.0.1-0.20210305035536-64b5b1c73954 h1:xQdMZ1WLrgkkvOZ/LDQxjVxMLdby7osSh4ZEVa5sIjs=
+github.com/virtuald/go-ordered-json v0.0.0-20170621173500-b18e6e673d74 h1:JwtAtbp7r/7QSyGz8mKUbYJBg2+6Cd7OjM8o/GNOcVo=
+github.com/virtuald/go-ordered-json v0.0.0-20170621173500-b18e6e673d74/go.mod h1:RmMWU37GKR2s6pgrIEB4ixgpVCt/cf7dnJv3fuH1J1c=
+go.etcd.io/bbolt v1.3.7 h1:j+zJOnnEjF/kyHlDDgGnVL/AIqIJPq8UoB2GSNfkUfQ=
 golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
+golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/morph/policy/policy_contract_storage.go

@@ -0,0 +1,152 @@
+package policy
+
+import (
+	"errors"
+	"fmt"
+	"math/big"
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-contract/policy"
+	client "git.frostfs.info/TrueCloudLab/frostfs-contract/rpcclient/policy"
+	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
+	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine"
+	"github.com/mr-tron/base58"
+	"github.com/nspcc-dev/neo-go/pkg/rpcclient/actor"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
+)
+
+var (
+	ErrEmptyChainID = errors.New("chain id is not set")
+
+	ErrEngineTargetTypeUnsupported = errors.New("this target type is not supported yet")
+)
+
+// ContractStorage is the interface to manage chain rules within the policy contract.
+type ContractStorage struct {
+	contractInterface *client.Contract
+}
+
+var _ engine.MorphRuleChainStorage = (*ContractStorage)(nil)
+
+func NewContractStorage(actor client.Actor, contract util.Uint160) *ContractStorage {
+	return &ContractStorage{
+		contractInterface: client.New(actor, contract),
+	}
+}
+
+func NewContractStorageWithSimpleActor(rpcActor actor.RPCActor, acc *wallet.Account, contract util.Uint160) (*ContractStorage, error) {
+	act, err := actor.NewSimple(rpcActor, acc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create simple actor: %w", err)
+	}
+	return NewContractStorage(act, contract), nil
+}
+
+func transformNameIfContainer(target engine.Target) (name string) {
+	name = target.Name
+	if target.Type == engine.Container {
+		// Container name can be too long and, thus, cannot be
+		// used as a key name for policy-contract storage.
+		name = base58.FastBase58Encoding([]byte(target.Name))
+	}
+	return
+}
+
+func (s *ContractStorage) AddMorphRuleChain(name chain.Name, target engine.Target, c *chain.Chain) (txHash util.Uint256, vub uint32, err error) {
+	if c.ID == "" {
+		err = ErrEmptyChainID
+		return
+	}
+
+	var kind policy.Kind
+	kind, err = policyKind(target.Type)
+	if err != nil {
+		return
+	}
+	fullName := prefixedChainName(name, c.ID)
+	targetName := transformNameIfContainer(target)
+
+	txHash, vub, err = s.contractInterface.AddChain(big.NewInt(int64(kind)), targetName, fullName, c.Bytes())
+	return
+}
+
+func (s *ContractStorage) RemoveMorphRuleChain(name chain.Name, target engine.Target, chainID chain.ID) (txHash util.Uint256, vub uint32, err error) {
+	if chainID == "" {
+		err = ErrEmptyChainID
+		return
+	}
+
+	var kind policy.Kind
+	kind, err = policyKind(target.Type)
+	if err != nil {
+		return
+	}
+	fullName := prefixedChainName(name, chainID)
+	targetName := transformNameIfContainer(target)
+
+	txHash, vub, err = s.contractInterface.RemoveChain(big.NewInt(int64(kind)), targetName, fullName)
+	return
+}
+
+func (s *ContractStorage) ListMorphRuleChains(name chain.Name, target engine.Target) ([]*chain.Chain, error) {
+	kind, err := policyKind(target.Type)
+	if err != nil {
+		return nil, err
+	}
+	targetName := transformNameIfContainer(target)
+
+	items, err := s.contractInterface.ListChainsByPrefix(big.NewInt(int64(kind)), targetName, []byte(name))
+	if err != nil {
+		return nil, err
+	}
+
+	var chains []*chain.Chain
+	for _, item := range items {
+		serialized, err := bytesFromStackItem(item)
+		if err != nil {
+			return nil, err
+		}
+		c := new(chain.Chain)
+		if err := c.DecodeBytes(serialized); err != nil {
+			return nil, err
+		}
+		chains = append(chains, c)
+	}
+
+	return chains, nil
+}
+
+func bytesFromStackItem(param stackitem.Item) ([]byte, error) {
+	switch param.Type() {
+	case stackitem.BufferT, stackitem.ByteArrayT:
+		return param.TryBytes()
+	case stackitem.IntegerT:
+		n, err := param.TryInteger()
+		if err != nil {
+			return nil, fmt.Errorf("can't parse integer bytes: %w", err)
+		}
+		return n.Bytes(), nil
+	case stackitem.AnyT:
+		if param.Value() == nil {
+			return nil, nil
+		}
+		fallthrough
+	default:
+		return nil, fmt.Errorf("chain/client: %s is not a byte array type", param.Type())
+	}
+}
+
+func prefixedChainName(name chain.Name, chainID chain.ID) []byte {
+	return []byte(strings.ToLower(fmt.Sprintf("%s:%s", name, chainID)))
+}
+
+func policyKind(typ engine.TargetType) (policy.Kind, error) {
+	if typ == engine.Namespace {
+		return policy.Namespace, nil
+	} else if typ == engine.Container {
+		return policy.Container, nil
+	}
+	return policy.Kind(0), ErrEngineTargetTypeUnsupported
+}