From 80f76ae97372ea074ce660dbcaffd97c648ece22 Mon Sep 17 00:00:00 2001
From: Determinant <tederminant@gmail.com>
Date: Sat, 19 Sep 2020 19:32:37 -0400
Subject: fully support C<->X asset transfer

---
 go.sum                  |  1 +
 internal/ethapi/api.go  |  5 +++--
 plugin/evm/export_tx.go | 30 ++++++++++++++++++------------
 plugin/evm/service.go   |  3 +--
 4 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/go.sum b/go.sum
index f3b1b46..46ee8bd 100644
--- a/go.sum
+++ b/go.sum
@@ -45,6 +45,7 @@ github.com/ava-labs/avalanchego v0.8.0-beta/go.mod h1:quYojL1hu0ue2glUT1ng28kADs
 github.com/ava-labs/avalanchego v0.8.0 h1:aAt4roNkkaQx8jgQeKDvTGqSJ2h++rilBAK/xo/uYqo=
 github.com/ava-labs/avalanchego v0.8.3 h1:ioc7RtSAzIv40qxHDikhqZGVxF3y+8cXeIrLpGz9jtc=
 github.com/ava-labs/avalanchego v0.8.3/go.mod h1:6zPzQv7m6vSvdKAwH+lLTga0IMd/0+HLMT5OULrpFcU=
+github.com/ava-labs/avalanchego v0.8.4 h1:8ulQiUsw0r0G0/teZb+fR6fvsZo1YHPJ5fKxQWjT+LM=
 github.com/ava-labs/coreth v0.2.5/go.mod h1:pGolKipwq5vGIY2IBBcBkMYrqniXMsS5SBn+BBi4+Js=
 github.com/ava-labs/coreth v0.2.14-rc.1/go.mod h1:Zhb60GFIB7G5AnUCks0Jo4Rezx/EovL8o+z51aBF1A8=
 github.com/ava-labs/coreth v0.2.15-rc.4/go.mod h1:+sK2XGKCNA48uzeHWe4iBzmiOBYmYvnnzLtOkQeQfkk=
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 9e50f64..825f8fc 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -25,6 +25,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/ava-labs/avalanchego/ids"
 	"github.com/ava-labs/coreth/accounts"
 	"github.com/ava-labs/coreth/accounts/keystore"
 	"github.com/ava-labs/coreth/accounts/scwallet"
@@ -558,12 +559,12 @@ func (s *PublicBlockChainAPI) GetBalance(ctx context.Context, address common.Add
 // GetBalanceMultiCoin returns the amount of wei for the given address in the state of the
 // given block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta
 // block numbers are also allowed.
-func (s *PublicBlockChainAPI) GetBalanceMultiCoin(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash, coinID common.Hash) (*hexutil.Big, error) {
+func (s *PublicBlockChainAPI) GetAssetBalance(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash, assetID ids.ID) (*hexutil.Big, error) {
 	state, _, err := s.b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
 	if state == nil || err != nil {
 		return nil, err
 	}
-	return (*hexutil.Big)(state.GetBalanceMultiCoin(address, coinID)), state.Error()
+	return (*hexutil.Big)(state.GetBalanceMultiCoin(address, assetID.Key())), state.Error()
 }
 
 // Result structs for GetProof
diff --git a/plugin/evm/export_tx.go b/plugin/evm/export_tx.go
index 9cfd5ba..8b512df 100644
--- a/plugin/evm/export_tx.go
+++ b/plugin/evm/export_tx.go
@@ -198,23 +198,25 @@ func (vm *VM) newExportTx(
 		signers = append(signers, signers2...)
 	}
 
+	exportOuts := []*avax.TransferableOutput{{ // Exported to X-Chain
+		Asset: avax.Asset{ID: assetID},
+		Out: &secp256k1fx.TransferOutput{
+			Amt: amount,
+			OutputOwners: secp256k1fx.OutputOwners{
+				Locktime:  0,
+				Threshold: 1,
+				Addrs:     []ids.ShortID{to},
+			},
+		},
+	}}
+
 	// Create the transaction
 	utx := &UnsignedExportTx{
 		NetworkID:        vm.ctx.NetworkID,
 		BlockchainID:     vm.ctx.ChainID,
 		DestinationChain: chainID,
 		Ins:              ins,
-		ExportedOutputs: []*avax.TransferableOutput{{ // Exported to X-Chain
-			Asset: avax.Asset{ID: assetID},
-			Out: &secp256k1fx.TransferOutput{
-				Amt: amount,
-				OutputOwners: secp256k1fx.OutputOwners{
-					Locktime:  0,
-					Threshold: 1,
-					Addrs:     []ids.ShortID{to},
-				},
-			},
-		}},
+		ExportedOutputs:  exportOuts,
 	}
 	tx := &Tx{UnsignedTx: utx}
 	if err := tx.Sign(vm.codec, signers); err != nil {
@@ -224,6 +226,7 @@ func (vm *VM) newExportTx(
 }
 
 func (tx *UnsignedExportTx) EVMStateTransfer(vm *VM, state *state.StateDB) error {
+	addrs := map[[20]byte]uint64{}
 	for _, from := range tx.Ins {
 		log.Info("crosschain C->X", "addr", from.Address, "amount", from.Amount)
 		amount := new(big.Int).Mul(
@@ -243,7 +246,10 @@ func (tx *UnsignedExportTx) EVMStateTransfer(vm *VM, state *state.StateDB) error
 		if state.GetNonce(from.Address) != from.Nonce {
 			return errInvalidNonce
 		}
-		state.SetNonce(from.Address, from.Nonce+1)
+		addrs[from.Address] = from.Nonce
+	}
+	for addr, nonce := range addrs {
+		state.SetNonce(addr, nonce+1)
 	}
 	return nil
 }
diff --git a/plugin/evm/service.go b/plugin/evm/service.go
index f50d66a..c34a59d 100644
--- a/plugin/evm/service.go
+++ b/plugin/evm/service.go
@@ -329,10 +329,9 @@ func (service *AvaxAPI) Export(_ *http.Request, args *ExportArgs, response *api.
 		return fmt.Errorf("couldn't get addresses controlled by the user: %w", err)
 	}
 
-	assetID := service.vm.ctx.AVAXAssetID
 	// Create the transaction
 	tx, err := service.vm.newExportTx(
-		assetID,             // AssetID
+		args.AssetID,        // AssetID
 		uint64(args.Amount), // Amount
 		chainID,             // ID of the chain to send the funds to
 		to,                  // Address
-- 
cgit v1.2.3