feat: EthAPI: Add FilecoinAddressToEthAddress

api/api_full.go

@@ -771,6 +771,8 @@ type FullNode interface {
 	EthAccounts(ctx context.Context) ([]ethtypes.EthAddress, error) //perm:read
 	// EthAddressToFilecoinAddress converts an EthAddress into an f410 Filecoin Address
 	EthAddressToFilecoinAddress(ctx context.Context, ethAddress ethtypes.EthAddress) (address.Address, error) //perm:read
+	// FilecoinAddressToEthAddress converts an f410 or f0 Filecoin Address to an EthAddress
+	FilecoinAddressToEthAddress(ctx context.Context, filecoinAddress address.Address) (ethtypes.EthAddress, error) //perm:read
 	// EthBlockNumber returns the height of the latest (heaviest) TipSet
 	EthBlockNumber(ctx context.Context) (ethtypes.EthUint64, error) //perm:read
 	// EthGetBlockTransactionCountByNumber returns the number of messages in the TipSet

documentation/en/api-v1-unstable-methods.md

@@ -101,6 +101,8 @@
   * [EthSubscribe](#EthSubscribe)
   * [EthUninstallFilter](#EthUninstallFilter)
   * [EthUnsubscribe](#EthUnsubscribe)
+* [Filecoin](#Filecoin)
+  * [FilecoinAddressToEthAddress](#FilecoinAddressToEthAddress)
 * [Gas](#Gas)
   * [GasEstimateFeeCap](#GasEstimateFeeCap)
   * [GasEstimateGasLimit](#GasEstimateGasLimit)
@@ -2944,6 +2946,24 @@ Inputs:
 
 Response: `true`
 
+## Filecoin
+
+
+### FilecoinAddressToEthAddress
+FilecoinAddressToEthAddress converts an f410 or f0 Filecoin Address to an EthAddress
+
+
+Perms: read
+
+Inputs:
+```json
+[
+  "f01234"
+]
+```
+
+Response: `"0x5cbeecf99d3fdb3f25e309cc264f240bb0664031"`
+
 ## Gas
 
 

gateway/node.go

@@ -89,6 +89,7 @@ type TargetAPI interface {
 	WalletBalance(context.Context, address.Address) (types.BigInt, error)
 
 	EthAddressToFilecoinAddress(ctx context.Context, ethAddress ethtypes.EthAddress) (address.Address, error)
+	FilecoinAddressToEthAddress(ctx context.Context, filecoinAddress address.Address) (ethtypes.EthAddress, error)
 	EthBlockNumber(ctx context.Context) (ethtypes.EthUint64, error)
 	EthGetBlockTransactionCountByNumber(ctx context.Context, blkNum ethtypes.EthUint64) (ethtypes.EthUint64, error)
 	EthGetBlockTransactionCountByHash(ctx context.Context, blkHash ethtypes.EthHash) (ethtypes.EthUint64, error)

itests/eth_api_test.go

@@ -46,3 +46,44 @@ func TestEthAddressToFilecoinAddress(t *testing.T) {
 	require.Equal(t, filecoinIdArr, apiFilAddr)
 
 }
+
+func TestFilecoinAddressToEthAddress(t *testing.T) {
+	// Disable EthRPC to confirm that this method does NOT need the EthEnableRPC config set to true
+	client, _, _ := kit.EnsembleMinimal(t, kit.MockProofs(), kit.ThroughRPC(), kit.DisableEthRPC())
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	defer cancel()
+
+	secpDelegatedKey, err := key.GenerateKey(types.KTDelegated)
+	require.NoError(t, err)
+
+	filecoinKeyAddr, err := client.WalletImport(ctx, &secpDelegatedKey.KeyInfo)
+	require.NoError(t, err)
+
+	ethAddr, err := ethtypes.EthAddressFromFilecoinAddress(filecoinKeyAddr)
+	require.NoError(t, err)
+
+	apiEthAddr, err := client.FilecoinAddressToEthAddress(ctx, filecoinKeyAddr)
+	require.NoError(t, err)
+
+	require.Equal(t, ethAddr, apiEthAddr)
+
+	filecoinIdArr := builtin.StorageMarketActorAddr
+	ethAddr, err = ethtypes.EthAddressFromFilecoinAddress(filecoinIdArr)
+	require.NoError(t, err)
+
+	apiEthAddr, err = client.FilecoinAddressToEthAddress(ctx, filecoinIdArr)
+	require.NoError(t, err)
+
+	require.Equal(t, ethAddr, apiEthAddr)
+
+	secpKey, err := key.GenerateKey(types.KTSecp256k1)
+	require.NoError(t, err)
+
+	filecoinSecpAddr, err := client.WalletImport(ctx, &secpKey.KeyInfo)
+	require.NoError(t, err)
+
+	_, err = client.FilecoinAddressToEthAddress(ctx, filecoinSecpAddr)
+
+	require.ErrorContains(t, err, ethtypes.ErrInvalidAddress.Error())
+}

node/impl/full/eth.go

@@ -186,6 +186,10 @@ func (a *EthAPI) EthAddressToFilecoinAddress(ctx context.Context, ethAddress eth
 	return ethAddress.ToFilecoinAddress()
 }
 
+func (a *EthAPI) FilecoinAddressToEthAddress(ctx context.Context, filecoinAddress address.Address) (ethtypes.EthAddress, error) {
+	return ethtypes.EthAddressFromFilecoinAddress(filecoinAddress)
+}
+
 func (a *EthModule) countTipsetMsgs(ctx context.Context, ts *types.TipSet) (int, error) {
 	blkMsgs, err := a.Chain.BlockMsgsForTipset(ctx, ts)
 	if err != nil {