Update the cannon oracle updater with apriori data tx crafting

op-challenger/fault/cannon/updater.go

@@ -2,6 +2,8 @@ package cannon
 
 import (
 	"context"
+	"fmt"
+	"math/big"
 
 	"github.com/ethereum-optimism/optimism/op-bindings/bindings"
 	"github.com/ethereum-optimism/optimism/op-challenger/fault/types"
@@ -9,13 +11,14 @@ import (
 
 	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
+	ethtypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
 )
 
 // cannonUpdater is a [types.OracleUpdater] that exposes a method
 // to update onchain cannon oracles with required data.
 type cannonUpdater struct {
-	logger log.Logger
+	log   log.Logger
 	txMgr txmgr.TxManager
 
 	fdgAbi  abi.ABI
@@ -42,7 +45,7 @@ func NewOracleUpdater(
 	}
 
 	return &cannonUpdater{
-		logger: logger,
+		log:   logger,
 		txMgr: txMgr,
 
 		fdgAbi:  *fdgAbi,
@@ -55,5 +58,67 @@ func NewOracleUpdater(
 
 // UpdateOracle updates the oracle with the given data.
 func (u *cannonUpdater) UpdateOracle(ctx context.Context, data types.PreimageOracleData) error {
-	panic("oracle updates not implemented")
+	if data.IsLocal {
+		return u.sendLocalOracleData(ctx, data)
+	}
+	return u.sendGlobalOracleData(ctx, data)
+}
+
+// sendLocalOracleData sends the local oracle data to the [txmgr].
+func (u *cannonUpdater) sendLocalOracleData(ctx context.Context, data types.PreimageOracleData) error {
+	txData, err := u.buildLocalOracleData(data)
+	if err != nil {
+		return fmt.Errorf("local oracle tx data build: %w", err)
+	}
+	return u.sendTxAndWait(ctx, u.fdgAddr, txData)
+}
+
+// sendGlobalOracleData sends the global oracle data to the [txmgr].
+func (u *cannonUpdater) sendGlobalOracleData(ctx context.Context, data types.PreimageOracleData) error {
+	txData, err := u.buildGlobalOracleData(data)
+	if err != nil {
+		return fmt.Errorf("global oracle tx data build: %w", err)
+	}
+	return u.sendTxAndWait(ctx, u.fdgAddr, txData)
+}
+
+// buildLocalOracleData takes the local preimage key and data
+// and creates tx data to load the key, data pair into the
+// PreimageOracle contract from the FaultDisputeGame contract call.
+func (u *cannonUpdater) buildLocalOracleData(data types.PreimageOracleData) ([]byte, error) {
+	return u.fdgAbi.Pack(
+		"addLocalData",
+		data.OracleKey,
+		big.NewInt(0),
+	)
+}
+
+// buildGlobalOracleData takes the global preimage key and data
+// and creates tx data to load the key, data pair into the
+// PreimageOracle contract.
+func (u *cannonUpdater) buildGlobalOracleData(data types.PreimageOracleData) ([]byte, error) {
+	return u.preimageOracleAbi.Pack(
+		"loadKeccak256PreimagePart",
+		big.NewInt(0),
+		data.OracleData,
+	)
+}
+
+// sendTxAndWait sends a transaction through the [txmgr] and waits for a receipt.
+// This sets the tx GasLimit to 0, performing gas estimation online through the [txmgr].
+func (u *cannonUpdater) sendTxAndWait(ctx context.Context, addr common.Address, txData []byte) error {
+	receipt, err := u.txMgr.Send(ctx, txmgr.TxCandidate{
+		To:       &addr,
+		TxData:   txData,
+		GasLimit: 0,
+	})
+	if err != nil {
+		return err
+	}
+	if receipt.Status == ethtypes.ReceiptStatusFailed {
+		u.log.Error("Responder tx successfully published but reverted", "tx_hash", receipt.TxHash)
+	} else {
+		u.log.Debug("Responder tx successfully published", "tx_hash", receipt.TxHash)
+	}
+	return nil
 }

op-challenger/fault/types/types.go

@@ -3,6 +3,7 @@ package types
 import (
 	"context"
 	"errors"
+	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
 )
@@ -27,6 +28,11 @@ type PreimageOracleData struct {
 	OracleData []byte
 }
 
+// GetIdent returns the ident for the preimage oracle data.
+func (p *PreimageOracleData) GetIdent() *big.Int {
+	return big.NewInt(int64(p.OracleData[0]))
+}
+
 // NewPreimageOracleData creates a new [PreimageOracleData] instance.
 func NewPreimageOracleData(key []byte, data []byte) PreimageOracleData {
 	return PreimageOracleData{