| 1 | package x402 |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "fmt" |
| 6 | "net/http" |
| 7 | "strings" |
| 8 | |
| 9 | facilitatorapi "github.com/gosuda/x402-facilitator/api" |
| 10 | facilitatorcore "github.com/gosuda/x402-facilitator/facilitator" |
| 11 | suischeme "github.com/gosuda/x402-facilitator/scheme/sui" |
| 12 | |
| 13 | "github.com/gosuda/portal-tunnel/v2/types" |
| 14 | ) |
| 15 | |
| 16 | const ( |
| 17 | MainnetNetwork = "sui:mainnet" |
| 18 | TestnetNetwork = "sui:testnet" |
| 19 | |
| 20 | defaultMaxTimeoutSeconds = 60 |
| 21 | ) |
| 22 | |
| 23 | var networkDisplayNames = map[string]string{ |
| 24 | MainnetNetwork: "Sui Mainnet", |
| 25 | TestnetNetwork: "Sui Testnet", |
| 26 | } |
| 27 | |
| 28 | func Network(testnet bool) string { |
| 29 | if testnet { |
| 30 | return TestnetNetwork |
| 31 | } |
| 32 | return MainnetNetwork |
| 33 | } |
| 34 | |
| 35 | func NetworkDisplayName(network string) string { |
| 36 | return networkDisplayNames[strings.TrimSpace(strings.ToLower(network))] |
| 37 | } |
| 38 | |
| 39 | type FacilitatorConfig struct { |
| 40 | Testnet bool |
| 41 | } |
| 42 | |
| 43 | func MountFacilitator(mux *http.ServeMux, cfg FacilitatorConfig) error { |
| 44 | if mux == nil { |
| 45 | return errors.New("x402 facilitator requires an api mux") |
| 46 | } |
| 47 | facilitator, err := newUSDCFacilitator(Network(cfg.Testnet), "") |
| 48 | if err != nil { |
| 49 | return fmt.Errorf("create sui x402 facilitator: %w", err) |
| 50 | } |
| 51 | mux.Handle(types.PathX402Facilitator+"/", http.StripPrefix(types.PathX402Facilitator, facilitatorapi.NewServer(facilitator))) |
| 52 | return nil |
| 53 | } |
| 54 | |
| 55 | func usdcAsset(network string) (string, error) { |
| 56 | network = strings.ToLower(strings.TrimSpace(network)) |
| 57 | asset, ok := suischeme.GetGaslessStablecoinType(network, "USDC") |
| 58 | if !ok { |
| 59 | return "", fmt.Errorf("USDC is not gasless stablecoin allowlisted on %s", network) |
| 60 | } |
| 61 | return asset, nil |
| 62 | } |
| 63 | |
| 64 | func newUSDCFacilitator(network, asset string, endpoints ...string) (facilitatorcore.Facilitator, error) { |
| 65 | network = strings.ToLower(strings.TrimSpace(network)) |
| 66 | if network == "" { |
| 67 | network = MainnetNetwork |
| 68 | } |
| 69 | if asset == "" { |
| 70 | var err error |
| 71 | asset, err = usdcAsset(network) |
| 72 | if err != nil { |
| 73 | return nil, err |
| 74 | } |
| 75 | } |
| 76 | url := "" |
| 77 | for _, endpoint := range endpoints { |
| 78 | if endpoint = strings.TrimSpace(endpoint); endpoint != "" { |
| 79 | url = endpoint |
| 80 | break |
| 81 | } |
| 82 | } |
| 83 | return facilitatorcore.NewSuiFacilitatorWithOptions(network, url, "", facilitatorcore.SuiFacilitatorOptions{ |
| 84 | GaslessStablecoinTypes: []string{asset}, |
| 85 | }) |
| 86 | } |