Extract child token address and print it in the bridge deposit command

command/bridge/common/params.go

@@ -13,6 +13,7 @@ import (
 	cmdHelper "github.com/0xPolygon/polygon-edge/command/helper"
 	"github.com/0xPolygon/polygon-edge/consensus/polybft/contractsapi"
 	"github.com/0xPolygon/polygon-edge/txrelayer"
+	"github.com/0xPolygon/polygon-edge/types"
 )
 
 type TokenType int
@@ -160,21 +161,58 @@ func ExtractExitEventID(receipt *ethgo.Receipt) (*big.Int, error) {
 	return nil, errors.New("failed to find exit event log")
 }
 
+// ExtractChildTokenAddr extracts predicted deterministic child token address
+func ExtractChildTokenAddr(receipt *ethgo.Receipt, childChainMintable bool) (*types.Address, error) {
+	var (
+		l1TokenMapped contractsapi.TokenMappedEvent
+		l2TokenMapped contractsapi.L2MintableTokenMappedEvent
+	)
+
+	for _, log := range receipt.Logs {
+		if childChainMintable {
+			doesMatch, err := l2TokenMapped.ParseLog(log)
+			if err != nil {
+				return nil, err
+			}
+
+			if !doesMatch {
+				continue
+			}
+
+			return &l2TokenMapped.ChildToken, nil
+		} else {
+			doesMatch, err := l1TokenMapped.ParseLog(log)
+			if err != nil {
+				return nil, err
+			}
+
+			if !doesMatch {
+				continue
+			}
+
+			return &l1TokenMapped.ChildToken, nil
+		}
+	}
+
+	return nil, nil
+}
+
 type BridgeTxResult struct {
-	Sender       string     `json:"sender"`
-	Receivers    []string   `json:"receivers"`
-	ExitEventIDs []*big.Int `json:"exitEventIDs"`
-	Amounts      []string   `json:"amounts"`
-	TokenIDs     []string   `json:"tokenIds"`
-	BlockNumbers []uint64   `json:"blockNumbers"`
+	Sender         string         `json:"sender"`
+	Receivers      []string       `json:"receivers"`
+	ExitEventIDs   []*big.Int     `json:"exitEventIDs"`
+	Amounts        []string       `json:"amounts"`
+	TokenIDs       []string       `json:"tokenIds"`
+	BlockNumbers   []uint64       `json:"blockNumbers"`
+	ChildTokenAddr *types.Address `json:"childTokenAddr"`
 
 	Title string `json:"title"`
 }
 
 func (r *BridgeTxResult) GetOutput() string {
 	var buffer bytes.Buffer
 
-	vals := make([]string, 0, 5)
+	vals := make([]string, 0, 7)
 	vals = append(vals, fmt.Sprintf("Sender|%s", r.Sender))
 	vals = append(vals, fmt.Sprintf("Receivers|%s", strings.Join(r.Receivers, ", ")))
 
@@ -214,6 +252,10 @@ func (r *BridgeTxResult) GetOutput() string {
 		vals = append(vals, fmt.Sprintf("Inclusion Block Numbers|%s", buf.String()))
 	}
 
+	if r.ChildTokenAddr != nil {
+		vals = append(vals, fmt.Sprintf("Child Token Address|%s", (*r.ChildTokenAddr).String()))
+	}
+
 	_, _ = buffer.WriteString(fmt.Sprintf("\n[%s]\n", r.Title))
 	_, _ = buffer.WriteString(cmdHelper.FormatKV(vals))
 	_, _ = buffer.WriteString("\n")

command/bridge/deposit/erc1155/deposit_erc1155.go

@@ -230,6 +230,16 @@ func runCommand(cmd *cobra.Command, _ []string) {
 		res.ExitEventIDs = []*big.Int{exitEventID}
 	}
 
+	// populate child token address if a token is mapped alongside with deposit
+	childToken, err := common.ExtractChildTokenAddr(receipt, dp.ChildChainMintable)
+	if err != nil {
+		outputter.SetError(fmt.Errorf("failed to extract child token address: %w", err))
+
+		return
+	}
+
+	res.ChildTokenAddr = childToken
+
 	outputter.SetCommandResult(res)
 }
 

command/bridge/deposit/erc20/deposit_erc20.go

@@ -167,8 +167,9 @@ func runCommand(cmd *cobra.Command, _ []string) {
 	}
 
 	type bridgeTxData struct {
-		exitEventId *big.Int
-		blockNumber uint64
+		exitEventID    *big.Int
+		blockNumber    uint64
+		childTokenAddr *types.Address
 	}
 
 	g, ctx := errgroup.WithContext(cmd.Context())
@@ -200,18 +201,25 @@ func runCommand(cmd *cobra.Command, _ []string) {
 					return fmt.Errorf("receiver: %s, amount: %s", receiver, amount)
 				}
 
-				var exitEventId *big.Int
+				var exitEventID *big.Int
 
 				if dp.ChildChainMintable {
-					if exitEventId, err = common.ExtractExitEventID(receipt); err != nil {
+					if exitEventID, err = common.ExtractExitEventID(receipt); err != nil {
 						return fmt.Errorf("failed to extract exit event: %w", err)
 					}
 				}
 
+				// populate child token address if a token is mapped alongside with deposit
+				childToken, err := common.ExtractChildTokenAddr(receipt, dp.ChildChainMintable)
+				if err != nil {
+					return fmt.Errorf("failed to extract child token address: %w", err)
+				}
+
 				// send aggregated data to channel if everything went ok
 				bridgeTxCh <- bridgeTxData{
-					blockNumber: receipt.BlockNumber,
-					exitEventId: exitEventId,
+					blockNumber:    receipt.BlockNumber,
+					exitEventID:    exitEventID,
+					childTokenAddr: childToken,
 				}
 
 				return nil
@@ -227,19 +235,26 @@ func runCommand(cmd *cobra.Command, _ []string) {
 
 	close(bridgeTxCh)
 
+	var childToken *types.Address
+
 	for x := range bridgeTxCh {
-		exitEventIDs = append(exitEventIDs, x.exitEventId)
+		exitEventIDs = append(exitEventIDs, x.exitEventID)
 		blockNumbers = append(blockNumbers, x.blockNumber)
+
+		if x.childTokenAddr != nil {
+			childToken = x.childTokenAddr
+		}
 	}
 
 	outputter.SetCommandResult(
 		&common.BridgeTxResult{
-			Sender:       depositorAddr.String(),
-			Receivers:    dp.Receivers,
-			Amounts:      dp.Amounts,
-			ExitEventIDs: exitEventIDs,
-			BlockNumbers: blockNumbers,
-			Title:        "DEPOSIT ERC 20",
+			Sender:         depositorAddr.String(),
+			Receivers:      dp.Receivers,
+			Amounts:        dp.Amounts,
+			ExitEventIDs:   exitEventIDs,
+			ChildTokenAddr: childToken,
+			BlockNumbers:   blockNumbers,
+			Title:          "DEPOSIT ERC 20",
 		})
 }
 

command/bridge/deposit/erc721/deposit_erc721.go

@@ -203,6 +203,16 @@ func runCommand(cmd *cobra.Command, _ []string) {
 		res.ExitEventIDs = []*big.Int{exitEventID}
 	}
 
+	// populate child token address if a token is mapped alongside with deposit
+	childToken, err := common.ExtractChildTokenAddr(receipt, dp.ChildChainMintable)
+	if err != nil {
+		outputter.SetError(fmt.Errorf("failed to extract child token address: %w", err))
+
+		return
+	}
+
+	res.ChildTokenAddr = childToken
+
 	outputter.SetCommandResult(res)
 }
 

consensus/polybft/contractsapi/bindings-gen/main.go

@@ -153,7 +153,9 @@ func main() {
 				"initialize",
 				"depositTo",
 			},
-			[]string{},
+			[]string{
+				"TokenMapped",
+			},
 		},
 		{
 			"ChildMintableERC20Predicate",
@@ -243,7 +245,9 @@ func main() {
 			[]string{
 				"initialize",
 			},
-			[]string{},
+			[]string{
+				"L2MintableTokenMapped",
+			},
 		},
 		{
 			"ChildERC1155",

consensus/polybft/contractsapi/helper.go

@@ -2,6 +2,7 @@ package contractsapi
 
 import (
 	"github.com/0xPolygon/polygon-edge/types"
+	"github.com/umbracle/ethgo"
 	"github.com/umbracle/ethgo/abi"
 )
 
@@ -13,6 +14,16 @@ type StateTransactionInput interface {
 	DecodeAbi(b []byte) error
 }
 
+// Event is an abstraction for Ethereum events
+type Event interface {
+	// Sig returns hash signature of given event
+	Sig() ethgo.Hash
+	// Encode encodes given inputs into the ABI
+	Encode(inputs interface{}) ([]byte, error)
+	// ParseLog parses provided log and populates Event's instance fields
+	ParseLog(log *ethgo.Log) (bool, error)
+}
+
 var (
 	// stateSyncABIType is a specific case where we need to encode state sync event as a tuple of tuple
 	stateSyncABIType = abi.MustNewType(