frostfs-s3-gw/internal/frostfs/policy/contract/contract.go

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package contract
import (
"context"
"errors"
"fmt"
"math/big"
"git.frostfs.info/TrueCloudLab/frostfs-contract/commonclient"
policycontract "git.frostfs.info/TrueCloudLab/frostfs-contract/policy"
policyclient "git.frostfs.info/TrueCloudLab/frostfs-contract/rpcclient/policy"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/policy"
frostfsutil "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/util"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/rpcclient"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/actor"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/notary"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/wallet"
)
type Client struct {
actor *actor.Actor
policyContract *policyclient.Contract
contractHash util.Uint160
}
type Config struct {
// RPCAddress is an endpoint to connect to neo rpc.
RPCAddress string
// Contract is hash of contract or its name in NNS.
Contract string
// ProxyContract is hash of proxy contract or its name in NNS to interact with policy.
ProxyContract string
// Key is used to interact with policy contract.
// If this is nil than random key will be generated.
Key *keys.PrivateKey
}
var _ policy.Contract = (*Client)(nil)
// New creates new Policy contract wrapper.
func New(ctx context.Context, cfg Config) (*Client, error) {
contractHash, err := frostfsutil.ResolveContractHash(cfg.Contract, cfg.RPCAddress)
if err != nil {
return nil, fmt.Errorf("resolve frostfs contract hash: %w", err)
}
key := cfg.Key
if key == nil {
if key, err = keys.NewPrivateKey(); err != nil {
return nil, fmt.Errorf("generate anon private key for policy: %w", err)
}
}
rpcCli, err := rpcclient.New(ctx, cfg.RPCAddress, rpcclient.Options{})
if err != nil {
return nil, fmt.Errorf("create policy rpc client: %w", err)
}
proxyContractHash, err := frostfsutil.ResolveContractHash(cfg.ProxyContract, cfg.RPCAddress)
if err != nil {
return nil, fmt.Errorf("resolve frostfs contract hash: %w", err)
}
act, err := actor.New(rpcCli, getSigners(key, proxyContractHash, contractHash))
if err != nil {
return nil, fmt.Errorf("create new actor: %w", err)
}
return &Client{
actor: act,
policyContract: policyclient.New(act, contractHash),
contractHash: contractHash,
}, nil
}
func getSigners(key *keys.PrivateKey, proxyHash, contractHash util.Uint160) []actor.SignerAccount {
acc := wallet.NewAccountFromPrivateKey(key)
return []actor.SignerAccount{
{
Signer: transaction.Signer{
Account: proxyHash,
Scopes: transaction.CustomContracts,
AllowedContracts: []util.Uint160{contractHash},
},
Account: notary.FakeContractAccount(proxyHash),
},
{
Signer: transaction.Signer{
Account: acc.Contract.ScriptHash(),
Scopes: transaction.CalledByEntry,
},
Account: acc,
},
}
}
func (c *Client) AddChain(kind policycontract.Kind, entity string, name []byte, chain []byte) (util.Uint256, uint32, error) {
return c.policyContract.AddChain(big.NewInt(int64(kind)), entity, name, chain)
}
func (c *Client) GetChain(kind policycontract.Kind, entity string, name []byte) ([]byte, error) {
return c.policyContract.GetChain(big.NewInt(int64(kind)), entity, name)
}
func (c *Client) RemoveChain(kind policycontract.Kind, entity string, name []byte) (util.Uint256, uint32, error) {
return c.policyContract.RemoveChain(big.NewInt(int64(kind)), entity, name)
}
func (c *Client) ListChains(kind policycontract.Kind, entity string, name []byte) ([][]byte, error) {
items, err := c.policyContract.ListChainsByPrefix(big.NewInt(int64(kind)), entity, name)
if err != nil {
return nil, err
}
res := make([][]byte, len(items))
for i, item := range items {
res[i], err = item.TryBytes()
if err != nil {
return nil, err
}
}
return res, nil
}
func (c *Client) Wait(tx util.Uint256, vub uint32, err error) error {
_, err = c.actor.Wait(tx, vub, err)
return err
}
type multiTX struct {
contractHash util.Uint160
txs []*commonclient.Transaction
err error
}
func (m *multiTX) AddChain(entity policycontract.Kind, entityName string, name []byte, chain []byte) {
m.wrapCall("addChain", []any{big.NewInt(int64(entity)), entityName, name, chain})
}
func (m *multiTX) RemoveChain(entity policycontract.Kind, entityName string, name []byte) {
m.wrapCall("removeChain", []any{big.NewInt(int64(entity)), entityName, name})
}
func (m *multiTX) Scripts() ([][]byte, error) {
if m.err != nil {
return nil, m.err
}
if len(m.txs) == 0 {
return nil, errors.New("tx isn't initialized")
}
res := make([][]byte, 0, len(m.txs))
for _, tx := range m.txs {
script, err := tx.Bytes()
if err != nil {
return nil, err
}
res = append(res, script)
}
return res, nil
}
func (m *multiTX) wrapCall(method string, args []any) {
if m.err != nil {
return
}
if len(m.txs) == 0 {
m.err = errors.New("multi tx isn't initialized")
return
}
err := m.txs[len(m.txs)-1].WrapCall(method, args)
if err == nil {
return
}
if !errors.Is(commonclient.ErrTransactionTooLarge, err) {
m.err = err
return
}
tx := commonclient.NewTransaction(m.contractHash)
m.err = tx.WrapCall(method, args)
if m.err == nil {
m.txs = append(m.txs, tx)
}
}
func (c *Client) StartTx() policy.MultiTransaction {
return &multiTX{
txs: []*commonclient.Transaction{commonclient.NewTransaction(c.contractHash)},
contractHash: c.contractHash,
}
}
func (c *Client) SendTx(mtx policy.MultiTransaction) error {
var err error
scripts, err := mtx.Scripts()
if err != nil {
return err
}
for i := range scripts {
if _, err = c.actor.Wait(c.actor.SendRun(scripts[i])); err != nil {
return err
}
}
return nil
}