From 29fec1c2ee5cfa6655db491891c41bcb1f576b0b Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Thu, 2 Sep 2021 18:45:26 +0300
Subject: [PATCH] wallet: add remark14 option to migrate UTXO assets to N3

N3 migration works via sends to blackhole ANeo2toNeo3MigrationAddressxwPB2Hz
address with Remark14 attribute set to target N3 address [1]. This option
allows to create such transaction (but it doesn't check target address in any
way, if you make a mistake there you'll lose your assets forever). It works
like this:

$ neo-go wallet transfer -p file.wallet -r https://rpc-node:10331 --from AZ81H31DMWzbSnFDLFkzh9vHwaDLayV7fU --to ANeo2toNeo3MigrationAddressxwPB2Hz --asset NEO --amount 10 --remark14 NVTiAjNgagDkTr5HTzDmQP9kPwPHN5BgVq

[1]: https://docs.neo.org/tutorials/en-us/migrationB.html
---
 cli/wallet/wallet.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/cli/wallet/wallet.go b/cli/wallet/wallet.go
index b6cfb7f9a..2abcadf01 100644
--- a/cli/wallet/wallet.go
+++ b/cli/wallet/wallet.go
@@ -48,6 +48,10 @@ var (
 		Name:  "rpc, r",
 		Usage: "RPC node address",
 	}
+	r14Flag = cli.StringFlag{
+		Name:  "remark14",
+		Usage: "Remark14 field",
+	}
 	timeoutFlag = cli.DurationFlag{
 		Name:  "timeout, t",
 		Usage: "Timeout for the operation",
@@ -188,6 +192,7 @@ func NewCommands() []cli.Command {
 				Flags: []cli.Flag{
 					walletPathFlag,
 					rpcFlag,
+					r14Flag,
 					timeoutFlag,
 					outFlag,
 					fromAddrFlag,
@@ -487,6 +492,8 @@ func transferAsset(ctx *cli.Context) error {
 		return cli.NewExitError(fmt.Errorf("wallet contains no account for '%s'", from), 1)
 	}
 
+	remark14 := ctx.String("remark14")
+
 	asset, err := getAssetID(ctx.String("asset"))
 	if err != nil {
 		return cli.NewExitError(fmt.Errorf("invalid asset id: %v", err), 1)
@@ -517,6 +524,13 @@ func transferAsset(ctx *cli.Context) error {
 		return cli.NewExitError(err, 1)
 	}
 
+	if remark14 != "" {
+		tx.Attributes = append(tx.Attributes, transaction.Attribute{
+			Usage: transaction.Remark14,
+			Data:  []byte(remark14),
+		})
+	}
+
 	toFlag := ctx.Generic("to").(*flags.Address)
 	if !toFlag.IsSet {
 		return cli.NewExitError("'to' address was not provided", 1)