|
| 1 | +package prefetcher |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "errors" |
| 6 | + "fmt" |
| 7 | + "math/big" |
| 8 | + "time" |
| 9 | + |
| 10 | + "github.com/ethereum-optimism/optimism/op-node/rollup" |
| 11 | + "github.com/ethereum-optimism/optimism/op-program/host/common" |
| 12 | + "github.com/ethereum-optimism/optimism/op-program/host/types" |
| 13 | + "github.com/ethereum-optimism/optimism/op-service/client" |
| 14 | + "github.com/ethereum/go-ethereum/common/hexutil" |
| 15 | + "github.com/ethereum/go-ethereum/log" |
| 16 | +) |
| 17 | + |
| 18 | +var ( |
| 19 | + ErrNoSources = errors.New("no sources specified") |
| 20 | + ErrNoL2ForRollup = errors.New("no L2 RPC available for rollup") |
| 21 | + ErrNoRollupForL2 = errors.New("no rollup config available for L2 RPC") |
| 22 | + ErrDuplicateL2URLs = errors.New("multiple L2 URLs provided for chain") |
| 23 | + ErrNoRollupForExperimental = errors.New("no rollup config available for L2 experimental RPC") |
| 24 | + ErrDuplicateExperimentsURLs = errors.New("multiple experimental URLs provided for chain") |
| 25 | +) |
| 26 | + |
| 27 | +type RetryingL2Sources struct { |
| 28 | + Sources map[uint64]*RetryingL2Source |
| 29 | +} |
| 30 | + |
| 31 | +func NewRetryingL2SourcesFromURLs(ctx context.Context, logger log.Logger, configs []*rollup.Config, l2URLs []string, l2ExperimentalURLs []string) (*RetryingL2Sources, error) { |
| 32 | + l2Clients, err := connectRPCs(ctx, logger, l2URLs) |
| 33 | + if err != nil { |
| 34 | + return nil, err |
| 35 | + } |
| 36 | + l2ExperimentalClients, err := connectRPCs(ctx, logger, l2ExperimentalURLs) |
| 37 | + if err != nil { |
| 38 | + return nil, err |
| 39 | + } |
| 40 | + return NewRetryingL2Sources(ctx, logger, configs, l2Clients, l2ExperimentalClients) |
| 41 | +} |
| 42 | + |
| 43 | +func connectRPCs(ctx context.Context, logger log.Logger, urls []string) ([]client.RPC, error) { |
| 44 | + l2Clients := make([]client.RPC, len(urls)) |
| 45 | + for i, url := range urls { |
| 46 | + logger.Info("Connecting to L2 source", "url", url) |
| 47 | + // eth_getProof calls are expensive and takes time, so we use a longer timeout |
| 48 | + rpc, err := client.NewRPC(ctx, logger, url, client.WithDialAttempts(10), client.WithCallTimeout(5*time.Minute)) |
| 49 | + if err != nil { |
| 50 | + return nil, fmt.Errorf("failed to connect to rpc URL %s: %w", url, err) |
| 51 | + } |
| 52 | + l2Clients[i] = rpc |
| 53 | + } |
| 54 | + return l2Clients, nil |
| 55 | +} |
| 56 | + |
| 57 | +func NewRetryingL2Sources(ctx context.Context, logger log.Logger, configs []*rollup.Config, l2Clients []client.RPC, l2ExperimentalClients []client.RPC) (*RetryingL2Sources, error) { |
| 58 | + if len(configs) == 0 { |
| 59 | + return nil, ErrNoSources |
| 60 | + } |
| 61 | + rollupConfigs := make(map[uint64]*rollup.Config) |
| 62 | + for _, rollupCfg := range configs { |
| 63 | + rollupConfigs[rollupCfg.L2ChainID.Uint64()] = rollupCfg |
| 64 | + } |
| 65 | + l2RPCs := make(map[uint64]client.RPC) |
| 66 | + for _, rpc := range l2Clients { |
| 67 | + chainID, err := loadChainID(ctx, rpc) |
| 68 | + if err != nil { |
| 69 | + return nil, fmt.Errorf("failed to load chain ID: %w", err) |
| 70 | + } |
| 71 | + if _, ok := l2RPCs[chainID]; ok { |
| 72 | + return nil, fmt.Errorf("%w %v", ErrDuplicateL2URLs, chainID) |
| 73 | + } |
| 74 | + l2RPCs[chainID] = rpc |
| 75 | + if _, ok := rollupConfigs[chainID]; !ok { |
| 76 | + return nil, fmt.Errorf("%w: %v", ErrNoRollupForL2, chainID) |
| 77 | + } |
| 78 | + } |
| 79 | + |
| 80 | + l2ExperimentalRPCs := make(map[uint64]client.RPC) |
| 81 | + for _, rpc := range l2ExperimentalClients { |
| 82 | + chainID, err := loadChainID(ctx, rpc) |
| 83 | + if err != nil { |
| 84 | + return nil, fmt.Errorf("failed to load chain ID: %w", err) |
| 85 | + } |
| 86 | + if _, ok := l2ExperimentalRPCs[chainID]; ok { |
| 87 | + return nil, fmt.Errorf("%w %v", ErrDuplicateExperimentsURLs, chainID) |
| 88 | + } |
| 89 | + l2ExperimentalRPCs[chainID] = rpc |
| 90 | + if _, ok := rollupConfigs[chainID]; !ok { |
| 91 | + return nil, fmt.Errorf("%w: %v", ErrNoRollupForExperimental, chainID) |
| 92 | + } |
| 93 | + } |
| 94 | + |
| 95 | + sources := make(map[uint64]*RetryingL2Source, len(configs)) |
| 96 | + for _, rollupCfg := range rollupConfigs { |
| 97 | + chainID := rollupCfg.L2ChainID.Uint64() |
| 98 | + l2RPC, ok := l2RPCs[chainID] |
| 99 | + if !ok { |
| 100 | + return nil, fmt.Errorf("%w: %v", ErrNoL2ForRollup, chainID) |
| 101 | + } |
| 102 | + l2ExperimentalRPC := l2ExperimentalRPCs[chainID] // Allowed to be nil |
| 103 | + source, err := common.NewL2SourceFromRPC(logger, rollupCfg, l2RPC, l2ExperimentalRPC) |
| 104 | + if err != nil { |
| 105 | + return nil, fmt.Errorf("failed to create l2 source for chain ID %v: %w", chainID, err) |
| 106 | + } |
| 107 | + sources[chainID] = NewRetryingL2Source(logger, source) |
| 108 | + } |
| 109 | + |
| 110 | + return &RetryingL2Sources{ |
| 111 | + Sources: sources, |
| 112 | + }, nil |
| 113 | +} |
| 114 | + |
| 115 | +func (s *RetryingL2Sources) ForChainID(chainID uint64) (types.L2Source, error) { |
| 116 | + source, ok := s.Sources[chainID] |
| 117 | + if !ok { |
| 118 | + return nil, fmt.Errorf("no source available for chain ID: %v", chainID) |
| 119 | + } |
| 120 | + return source, nil |
| 121 | +} |
| 122 | + |
| 123 | +func (s *RetryingL2Sources) ForChainIDWithoutRetries(chainID uint64) (types.L2Source, error) { |
| 124 | + retrying, ok := s.Sources[chainID] |
| 125 | + if !ok { |
| 126 | + return nil, fmt.Errorf("no source available for chain ID: %v", chainID) |
| 127 | + } |
| 128 | + return retrying.source, nil |
| 129 | +} |
| 130 | + |
| 131 | +func loadChainID(ctx context.Context, rpc client.RPC) (uint64, error) { |
| 132 | + var id hexutil.Big |
| 133 | + err := rpc.CallContext(ctx, &id, "eth_chainId") |
| 134 | + if err != nil { |
| 135 | + return 0, err |
| 136 | + } |
| 137 | + return (*big.Int)(&id).Uint64(), nil |
| 138 | +} |
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