feat: add custodial registration proxy handler

cmd/service/router.go

@@ -21,6 +21,7 @@ func bootstrapEventRouter(cacheProvider cache.Cache, pubCB router.Callback) *rou
 	router.RegisterLogRoute(w3.H("0x6b7e2e653f93b645d4ed7292d6429f96637084363e477c8aaea1a43ed13c284e"), handler.HandleSealStateChangeLog())
 	router.RegisterLogRoute(w3.H("0xcc16f5dbb4873280815c1ee09dbd06736cffcc184412cf7a71a0fdb75d397ca5"), handler.HandleTokenBurnLog())
 	router.RegisterLogRoute(w3.H("0xab8530f87dc9b59234c4623bf917212bb2536d647574c8e7e5da92c2ede0c9f8"), handler.HandleTokenMintLog())
+	router.RegisterLogRoute(w3.H("0x894e56e1dac400b4475c83d8af0f0aa44de17c62764bd82f6e768a504e242461"), handler.HandleCustodialRegistrationLog())
 	router.RegisterLogRoute(w3.H("0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"), handler.HandleTokenTransferLog(handlerContainer))
 
 	router.RegisterInputDataRoute("63e4bff4", handler.HandleFaucetGiveInputData())
@@ -35,6 +36,7 @@ func bootstrapEventRouter(cacheProvider cache.Cache, pubCB router.Callback) *rou
 	router.RegisterInputDataRoute("86fe212d", handler.HandleSealStateChangeInputData())
 	router.RegisterInputDataRoute("42966c68", handler.HandleTokenBurnInputData())
 	router.RegisterInputDataRoute("449a52f8", handler.HandleTokenMintInputData())
+	router.RegisterInputDataRoute("4420e486", handler.HandleCustodialRegistrationInputData())
 	router.RegisterInputDataRoute("a9059cbb", handler.HandleTokenTransferInputData(handlerContainer))
 	router.RegisterInputDataRoute("23b872dd", handler.HandleTokenTransferInputData(handlerContainer))
 

internal/handler/custodial_registration.go

@@ -0,0 +1,66 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/grassrootseconomics/eth-tracker/pkg/event"
+	"github.com/grassrootseconomics/eth-tracker/pkg/router"
+	"github.com/lmittmann/w3"
+)
+
+const custodialRegistrationEventName = "CUSTODIAL_REGISTRATION"
+
+var (
+	custodialRegistrationEvent = w3.MustNewEvent("NewRegistration(address indexed subject)")
+	custodialRegistrationSig   = w3.MustNewFunc("register(address)", "")
+)
+
+func HandleCustodialRegistrationLog() router.LogHandlerFunc {
+	return func(ctx context.Context, lp router.LogPayload, c router.Callback) error {
+		var account common.Address
+
+		if err := custodialRegistrationEvent.DecodeArgs(lp.Log, &account); err != nil {
+			return err
+		}
+
+		custodialRegistrationEvent := event.Event{
+			Index:           lp.Log.Index,
+			Block:           lp.Log.BlockNumber,
+			ContractAddress: lp.Log.Address.Hex(),
+			Success:         true,
+			Timestamp:       lp.Timestamp,
+			TxHash:          lp.Log.TxHash.Hex(),
+			TxType:          custodialRegistrationEventName,
+			Payload: map[string]any{
+				"account": account.Hex(),
+			},
+		}
+
+		return c(ctx, custodialRegistrationEvent)
+	}
+}
+
+func HandleCustodialRegistrationInputData() router.InputDataHandlerFunc {
+	return func(ctx context.Context, idp router.InputDataPayload, c router.Callback) error {
+		var account common.Address
+
+		if err := custodialRegistrationSig.DecodeArgs(w3.B(idp.InputData), &account); err != nil {
+			return err
+		}
+
+		custodialRegistrationEvent := event.Event{
+			Block:           idp.Block,
+			ContractAddress: idp.ContractAddress,
+			Success:         false,
+			Timestamp:       idp.Timestamp,
+			TxHash:          idp.TxHash,
+			TxType:          custodialRegistrationEventName,
+			Payload: map[string]any{
+				"account": account.Hex(),
+			},
+		}
+
+		return c(ctx, custodialRegistrationEvent)
+	}
+}