status-go/services/ens/api.go

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package ens
import (
"context"
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"database/sql"
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"encoding/binary"
"encoding/hex"
"fmt"
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"math/big"
"net/url"
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"strings"
"sync"
"time"
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"github.com/ipfs/go-cid"
"github.com/multiformats/go-multibase"
"github.com/multiformats/go-multihash"
"github.com/pkg/errors"
"github.com/wealdtech/go-ens/v3"
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"github.com/wealdtech/go-multicodec"
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"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/log"
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"github.com/status-im/status-go/account"
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"github.com/status-im/status-go/contracts"
"github.com/status-im/status-go/contracts/registrar"
"github.com/status-im/status-go/contracts/resolver"
"github.com/status-im/status-go/contracts/snt"
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"github.com/status-im/status-go/params"
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"github.com/status-im/status-go/rpc"
"github.com/status-im/status-go/services/utils"
wcommon "github.com/status-im/status-go/services/wallet/common"
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"github.com/status-im/status-go/transactions"
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)
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const StatusDomain = "stateofus.eth"
func NewAPI(rpcClient *rpc.Client, accountsManager *account.GethManager, pendingTracker *transactions.PendingTxTracker, config *params.NodeConfig, appDb *sql.DB, timeSource func() time.Time, syncUserDetailFunc *syncUsernameDetail) *API {
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return &API{
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contractMaker: &contracts.ContractMaker{
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RPCClient: rpcClient,
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},
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accountsManager: accountsManager,
pendingTracker: pendingTracker,
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config: config,
addrPerChain: make(map[uint64]common.Address),
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db: NewEnsDatabase(appDb),
quit: make(chan struct{}),
timeSource: timeSource,
syncUserDetailFunc: syncUserDetailFunc,
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}
}
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type URI struct {
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Scheme string
Host string
Path string
}
// use this to avoid using messenger directly to avoid circular dependency (protocol->ens->protocol)
type syncUsernameDetail func(context.Context, *UsernameDetail) error
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type API struct {
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contractMaker *contracts.ContractMaker
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accountsManager *account.GethManager
pendingTracker *transactions.PendingTxTracker
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config *params.NodeConfig
addrPerChain map[uint64]common.Address
addrPerChainMutex sync.Mutex
quitOnce sync.Once
quit chan struct{}
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db *Database
syncUserDetailFunc *syncUsernameDetail
timeSource func() time.Time
}
func (api *API) Stop() {
api.quitOnce.Do(func() {
close(api.quit)
})
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}
func (api *API) unixTime() uint64 {
return uint64(api.timeSource().Unix())
}
func (api *API) GetEnsUsernames(ctx context.Context) ([]*UsernameDetail, error) {
removed := false
return api.db.GetEnsUsernames(&removed)
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}
func (api *API) Add(ctx context.Context, chainID uint64, username string) error {
ud := &UsernameDetail{Username: username, ChainID: chainID, Clock: api.unixTime()}
err := api.db.AddEnsUsername(ud)
if err != nil {
return err
}
return (*api.syncUserDetailFunc)(ctx, ud)
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}
func (api *API) Remove(ctx context.Context, chainID uint64, username string) error {
ud := &UsernameDetail{Username: username, ChainID: chainID, Clock: api.unixTime()}
affected, err := api.db.RemoveEnsUsername(ud)
if err != nil {
return err
}
if affected {
return (*api.syncUserDetailFunc)(ctx, ud)
}
return nil
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}
func (api *API) GetRegistrarAddress(ctx context.Context, chainID uint64) (common.Address, error) {
return api.usernameRegistrarAddr(ctx, chainID)
}
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func (api *API) Resolver(ctx context.Context, chainID uint64, username string) (*common.Address, error) {
err := validateENSUsername(username)
if err != nil {
return nil, err
}
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registry, err := api.contractMaker.NewRegistry(chainID)
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if err != nil {
return nil, err
}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
resolver, err := registry.Resolver(callOpts, nameHash(username))
if err != nil {
return nil, err
}
return &resolver, nil
}
func (api *API) GetName(ctx context.Context, chainID uint64, address common.Address) (string, error) {
backend, err := api.contractMaker.RPCClient.EthClient(chainID)
if err != nil {
return "", err
}
return ens.ReverseResolve(backend, address)
}
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func (api *API) OwnerOf(ctx context.Context, chainID uint64, username string) (*common.Address, error) {
err := validateENSUsername(username)
if err != nil {
return nil, err
}
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registry, err := api.contractMaker.NewRegistry(chainID)
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if err != nil {
return nil, err
}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
owner, err := registry.Owner(callOpts, nameHash(username))
if err != nil {
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return nil, err
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}
return &owner, nil
}
func (api *API) ContentHash(ctx context.Context, chainID uint64, username string) ([]byte, error) {
err := validateENSUsername(username)
if err != nil {
return nil, err
}
resolverAddress, err := api.Resolver(ctx, chainID, username)
if err != nil {
return nil, err
}
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resolver, err := api.contractMaker.NewPublicResolver(chainID, resolverAddress)
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if err != nil {
return nil, err
}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
contentHash, err := resolver.Contenthash(callOpts, nameHash(username))
if err != nil {
return nil, nil
}
return contentHash, nil
}
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func (api *API) PublicKeyOf(ctx context.Context, chainID uint64, username string) (string, error) {
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err := validateENSUsername(username)
if err != nil {
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return "", err
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}
resolverAddress, err := api.Resolver(ctx, chainID, username)
if err != nil {
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return "", err
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}
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resolver, err := api.contractMaker.NewPublicResolver(chainID, resolverAddress)
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if err != nil {
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return "", err
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}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
pubKey, err := resolver.Pubkey(callOpts, nameHash(username))
if err != nil {
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return "", err
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}
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return "0x04" + hex.EncodeToString(pubKey.X[:]) + hex.EncodeToString(pubKey.Y[:]), nil
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}
func (api *API) AddressOf(ctx context.Context, chainID uint64, username string) (*common.Address, error) {
err := validateENSUsername(username)
if err != nil {
return nil, err
}
resolverAddress, err := api.Resolver(ctx, chainID, username)
if err != nil {
return nil, err
}
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resolver, err := api.contractMaker.NewPublicResolver(chainID, resolverAddress)
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if err != nil {
return nil, err
}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
addr, err := resolver.Addr(callOpts, nameHash(username))
if err != nil {
return nil, err
}
return &addr, nil
}
func (api *API) usernameRegistrarAddr(ctx context.Context, chainID uint64) (common.Address, error) {
log.Info("obtaining username registrar address")
api.addrPerChainMutex.Lock()
defer api.addrPerChainMutex.Unlock()
addr, ok := api.addrPerChain[chainID]
if ok {
return addr, nil
}
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registryAddr, err := api.OwnerOf(ctx, chainID, StatusDomain)
if err != nil {
return common.Address{}, err
}
api.addrPerChain[chainID] = *registryAddr
go func() {
registry, err := api.contractMaker.NewRegistry(chainID)
if err != nil {
return
}
logs := make(chan *resolver.ENSRegistryWithFallbackNewOwner)
sub, err := registry.WatchNewOwner(&bind.WatchOpts{}, logs, nil, nil)
if err != nil {
return
}
for {
select {
case <-api.quit:
log.Info("quitting ens contract subscription")
sub.Unsubscribe()
return
case err := <-sub.Err():
if err != nil {
log.Error("ens contract subscription error: " + err.Error())
}
return
case vLog := <-logs:
api.addrPerChainMutex.Lock()
api.addrPerChain[chainID] = vLog.Owner
api.addrPerChainMutex.Unlock()
}
}
}()
return *registryAddr, nil
}
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func (api *API) ExpireAt(ctx context.Context, chainID uint64, username string) (string, error) {
registryAddr, err := api.usernameRegistrarAddr(ctx, chainID)
if err != nil {
return "", err
}
registrar, err := api.contractMaker.NewUsernameRegistrar(chainID, registryAddr)
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if err != nil {
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return "", err
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}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
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expTime, err := registrar.GetExpirationTime(callOpts, usernameToLabel(username))
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("%x", expTime), nil
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}
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func (api *API) Price(ctx context.Context, chainID uint64) (string, error) {
registryAddr, err := api.usernameRegistrarAddr(ctx, chainID)
if err != nil {
return "", err
}
registrar, err := api.contractMaker.NewUsernameRegistrar(chainID, registryAddr)
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if err != nil {
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return "", err
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}
callOpts := &bind.CallOpts{Context: ctx, Pending: false}
price, err := registrar.GetPrice(callOpts)
if err != nil {
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return "", err
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}
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return fmt.Sprintf("%x", price), nil
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}
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func (api *API) Release(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, password string, username string) (string, error) {
registryAddr, err := api.usernameRegistrarAddr(ctx, chainID)
if err != nil {
return "", err
}
registrar, err := api.contractMaker.NewUsernameRegistrar(chainID, registryAddr)
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if err != nil {
return "", err
}
txOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password))
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tx, err := registrar.Release(txOpts, usernameToLabel(username))
if err != nil {
return "", err
}
err = api.pendingTracker.TrackPendingTransaction(
wcommon.ChainID(chainID),
tx.Hash(),
common.Address(txArgs.From),
transactions.ReleaseENS,
transactions.AutoDelete,
)
if err != nil {
log.Error("TrackPendingTransaction error", "error", err)
return "", err
}
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err = api.Remove(ctx, chainID, fullDomainName(username))
if err != nil {
log.Warn("Releasing ENS username: transaction successful, but removing failed")
}
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return tx.Hash().String(), nil
}
func (api *API) ReleasePrepareTxCallMsg(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string) (ethereum.CallMsg, error) {
registrarABI, err := abi.JSON(strings.NewReader(registrar.UsernameRegistrarABI))
if err != nil {
return ethereum.CallMsg{}, err
}
data, err := registrarABI.Pack("release", usernameToLabel(username))
if err != nil {
return ethereum.CallMsg{}, err
}
sntAddress, err := snt.ContractAddress(chainID)
if err != nil {
return ethereum.CallMsg{}, err
}
return ethereum.CallMsg{
From: common.Address(txArgs.From),
To: &sntAddress,
Value: big.NewInt(0),
Data: data,
}, nil
}
func (api *API) ReleasePrepareTx(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string) (interface{}, error) {
callMsg, err := api.ReleasePrepareTxCallMsg(ctx, chainID, txArgs, username)
if err != nil {
return nil, err
}
return toCallArg(callMsg), nil
}
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func (api *API) ReleaseEstimate(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string) (uint64, error) {
registrarABI, err := abi.JSON(strings.NewReader(registrar.UsernameRegistrarABI))
if err != nil {
return 0, err
}
data, err := registrarABI.Pack("release", usernameToLabel(username))
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if err != nil {
return 0, err
}
ethClient, err := api.contractMaker.RPCClient.EthClient(chainID)
if err != nil {
return 0, err
}
registryAddr, err := api.usernameRegistrarAddr(ctx, chainID)
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if err != nil {
return 0, err
}
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estimate, err := ethClient.EstimateGas(ctx, ethereum.CallMsg{
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From: common.Address(txArgs.From),
To: &registryAddr,
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Value: big.NewInt(0),
Data: data,
})
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if err != nil {
return 0, err
}
return estimate + 1000, nil
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}
func (api *API) Register(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, password string, username string, pubkey string) (string, error) {
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snt, err := api.contractMaker.NewSNT(chainID)
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if err != nil {
return "", err
}
priceHex, err := api.Price(ctx, chainID)
if err != nil {
return "", err
}
price := new(big.Int)
price.SetString(priceHex, 16)
registrarABI, err := abi.JSON(strings.NewReader(registrar.UsernameRegistrarABI))
if err != nil {
return "", err
}
x, y := extractCoordinates(pubkey)
extraData, err := registrarABI.Pack("register", usernameToLabel(username), common.Address(txArgs.From), x, y)
if err != nil {
return "", err
}
registryAddr, err := api.usernameRegistrarAddr(ctx, chainID)
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if err != nil {
return "", err
}
txOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password))
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tx, err := snt.ApproveAndCall(
txOpts,
registryAddr,
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price,
extraData,
)
if err != nil {
return "", err
}
err = api.pendingTracker.TrackPendingTransaction(
wcommon.ChainID(chainID),
tx.Hash(),
common.Address(txArgs.From),
transactions.RegisterENS,
transactions.AutoDelete,
)
if err != nil {
log.Error("TrackPendingTransaction error", "error", err)
return "", err
}
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err = api.Add(ctx, chainID, fullDomainName(username))
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if err != nil {
log.Warn("Registering ENS username: transaction successful, but adding failed")
}
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return tx.Hash().String(), nil
}
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func (api *API) RegisterPrepareTxCallMsg(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string, pubkey string) (ethereum.CallMsg, error) {
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priceHex, err := api.Price(ctx, chainID)
if err != nil {
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return ethereum.CallMsg{}, err
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}
price := new(big.Int)
price.SetString(priceHex, 16)
registrarABI, err := abi.JSON(strings.NewReader(registrar.UsernameRegistrarABI))
if err != nil {
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return ethereum.CallMsg{}, err
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}
x, y := extractCoordinates(pubkey)
extraData, err := registrarABI.Pack("register", usernameToLabel(username), common.Address(txArgs.From), x, y)
if err != nil {
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return ethereum.CallMsg{}, err
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}
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sntABI, err := abi.JSON(strings.NewReader(snt.SNTABI))
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if err != nil {
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return ethereum.CallMsg{}, err
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}
registryAddr, err := api.usernameRegistrarAddr(ctx, chainID)
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if err != nil {
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return ethereum.CallMsg{}, err
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}
data, err := sntABI.Pack("approveAndCall", registryAddr, price, extraData)
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if err != nil {
return ethereum.CallMsg{}, err
}
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sntAddress, err := snt.ContractAddress(chainID)
if err != nil {
return ethereum.CallMsg{}, err
}
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return ethereum.CallMsg{
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From: common.Address(txArgs.From),
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To: &sntAddress,
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Value: big.NewInt(0),
Data: data,
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}, nil
}
func (api *API) RegisterPrepareTx(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string, pubkey string) (interface{}, error) {
callMsg, err := api.RegisterPrepareTxCallMsg(ctx, chainID, txArgs, username, pubkey)
if err != nil {
return nil, err
}
return toCallArg(callMsg), nil
}
func (api *API) RegisterEstimate(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string, pubkey string) (uint64, error) {
ethClient, err := api.contractMaker.RPCClient.EthClient(chainID)
if err != nil {
return 0, err
}
callMsg, err := api.RegisterPrepareTxCallMsg(ctx, chainID, txArgs, username, pubkey)
if err != nil {
return 0, err
}
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estimate, err := ethClient.EstimateGas(ctx, callMsg)
if err != nil {
return 0, err
}
return estimate + 1000, nil
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}
func (api *API) SetPubKey(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, password string, username string, pubkey string) (string, error) {
err := validateENSUsername(username)
if err != nil {
return "", err
}
resolverAddress, err := api.Resolver(ctx, chainID, username)
if err != nil {
return "", err
}
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resolver, err := api.contractMaker.NewPublicResolver(chainID, resolverAddress)
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if err != nil {
return "", err
}
x, y := extractCoordinates(pubkey)
txOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password))
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tx, err := resolver.SetPubkey(txOpts, nameHash(username), x, y)
if err != nil {
return "", err
}
err = api.pendingTracker.TrackPendingTransaction(
wcommon.ChainID(chainID),
tx.Hash(),
common.Address(txArgs.From),
transactions.SetPubKey,
transactions.AutoDelete,
)
if err != nil {
log.Error("TrackPendingTransaction error", "error", err)
return "", err
}
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err = api.Add(ctx, chainID, fullDomainName(username))
if err != nil {
log.Warn("Registering ENS username: transaction successful, but adding failed")
}
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return tx.Hash().String(), nil
}
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func (api *API) SetPubKeyPrepareTxCallMsg(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string, pubkey string) (ethereum.CallMsg, error) {
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err := validateENSUsername(username)
if err != nil {
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return ethereum.CallMsg{}, err
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}
x, y := extractCoordinates(pubkey)
resolverABI, err := abi.JSON(strings.NewReader(resolver.PublicResolverABI))
if err != nil {
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return ethereum.CallMsg{}, err
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}
data, err := resolverABI.Pack("setPubkey", nameHash(username), x, y)
if err != nil {
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return ethereum.CallMsg{}, err
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}
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resolverAddress, err := api.Resolver(ctx, chainID, username)
if err != nil {
return ethereum.CallMsg{}, err
}
return ethereum.CallMsg{
From: common.Address(txArgs.From),
To: resolverAddress,
Value: big.NewInt(0),
Data: data,
}, nil
}
func (api *API) SetPubKeyPrepareTx(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string, pubkey string) (interface{}, error) {
callMsg, err := api.SetPubKeyPrepareTxCallMsg(ctx, chainID, txArgs, username, pubkey)
if err != nil {
return nil, err
}
return toCallArg(callMsg), nil
}
func (api *API) SetPubKeyEstimate(ctx context.Context, chainID uint64, txArgs transactions.SendTxArgs, username string, pubkey string) (uint64, error) {
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ethClient, err := api.contractMaker.RPCClient.EthClient(chainID)
if err != nil {
return 0, err
}
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callMsg, err := api.SetPubKeyPrepareTxCallMsg(ctx, chainID, txArgs, username, pubkey)
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if err != nil {
return 0, err
}
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estimate, err := ethClient.EstimateGas(ctx, callMsg)
if err != nil {
return 0, err
}
return estimate + 1000, nil
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}
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func (api *API) ResourceURL(ctx context.Context, chainID uint64, username string) (*URI, error) {
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scheme := "https"
contentHash, err := api.ContentHash(ctx, chainID, username)
if err != nil {
return nil, err
}
if len(contentHash) == 0 {
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return &URI{}, nil
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}
data, codec, err := multicodec.RemoveCodec(contentHash)
if err != nil {
return nil, err
}
codecName, err := multicodec.Name(codec)
if err != nil {
return nil, err
}
switch codecName {
case "ipfs-ns":
thisCID, err := cid.Parse(data)
if err != nil {
return nil, errors.Wrap(err, "failed to parse CID")
}
str, err := thisCID.StringOfBase(multibase.Base32)
if err != nil {
return nil, errors.Wrap(err, "failed to obtain base36 representation")
}
parsedURL, _ := url.Parse(params.IpfsGatewayURL)
// Remove scheme from the url
host := parsedURL.Hostname() + parsedURL.Path + str
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return &URI{scheme, host, ""}, nil
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case "ipns-ns":
id, offset := binary.Uvarint(data)
if id == 0 {
return nil, fmt.Errorf("unknown CID")
}
data, _, err := multicodec.RemoveCodec(data[offset:])
if err != nil {
return nil, err
}
decodedMHash, err := multihash.Decode(data)
if err != nil {
return nil, err
}
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return &URI{scheme, string(decodedMHash.Digest), ""}, nil
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case "swarm-ns":
id, offset := binary.Uvarint(data)
if id == 0 {
return nil, fmt.Errorf("unknown CID")
}
data, _, err := multicodec.RemoveCodec(data[offset:])
if err != nil {
return nil, err
}
decodedMHash, err := multihash.Decode(data)
if err != nil {
return nil, err
}
path := "/bzz:/" + hex.EncodeToString(decodedMHash.Digest) + "/"
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return &URI{scheme, "swarm-gateways.net", path}, nil
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default:
return nil, fmt.Errorf("unknown codec name %s", codecName)
}
}
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func toCallArg(msg ethereum.CallMsg) interface{} {
arg := map[string]interface{}{
"from": msg.From,
"to": msg.To,
}
if len(msg.Data) > 0 {
arg["data"] = hexutil.Bytes(msg.Data)
}
if msg.Value != nil {
arg["value"] = (*hexutil.Big)(msg.Value)
}
if msg.Gas != 0 {
arg["gas"] = hexutil.Uint64(msg.Gas)
}
if msg.GasPrice != nil {
arg["gasPrice"] = (*hexutil.Big)(msg.GasPrice)
}
return arg
}
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func fullDomainName(username string) string {
return username + "." + StatusDomain
}