From 4a1d46cc1151fcad9b3e29992add26e592ff59a0 Mon Sep 17 00:00:00 2001
From: Vincent Tse <river_run@126.com>
Date: Mon, 25 Sep 2023 09:39:05 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=91=8C=20IMPROVE:=20Add=20derive=20path?=
 =?UTF-8?q?=20support=20to=20sign=20transaction=20/=20preview=20transactio?=
 =?UTF-8?q?n=20api?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 public/content.js                      |  2 +-
 src/lib/actions/preview-transaction.ts |  7 +++++--
 src/lib/actions/sign-transaction.ts    | 16 ++++------------
 src/lib/crypto.ts                      | 15 +++++++++++----
 4 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/public/content.js b/public/content.js
index d941108..c5e9286 100644
--- a/public/content.js
+++ b/public/content.js
@@ -1 +1 @@
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Error($.data.res.error);m&&typeof m=="function"&&m($.data)}return!0}};window.addEventListener("message",v)};return await new Promise(m=>{b(v=>{m(v.res)})})}async function I(){return await h("Connect")}async function j(){return await h("Disconnect")}async function R(){return await h("IsConnected","query")}async function tt(){return await h("GetNetwork","query")}async function nt(){return await h("SwitchNetwork")}async function et(u){return await h("GetAddress","query",u)}async function rt(u){return await h("GetPublicKey","query",u)}async function it(){return await h("GetXPublicKey","query")}async function F(u){return await h("GetBalance","query",u)}async function at(u){return await h("GetUtxos","query",u)}async function st(u){return await h("EciesEncrypt","authorize",u)}async function ut(u){return await h("EciesDecrypt","authorize",u)}async function ot(u){return await h("SignMessage","authorize",u)}async function ct(u){return await h("VerifySignature","query",u)}async function 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diff --git a/src/lib/actions/preview-transaction.ts b/src/lib/actions/preview-transaction.ts
index 15cac57..590ca7f 100644
--- a/src/lib/actions/preview-transaction.ts
+++ b/src/lib/actions/preview-transaction.ts
@@ -1,10 +1,13 @@
 import { mvc } from 'meta-contract'
 import { getCurrentAccount, privateKey } from '../account'
 import { signTransaction } from '../crypto'
+import { getNetwork } from '../network'
 
 export async function process(params: any, host: string) {
-  const wif = await getCurrentAccount().then(() => privateKey.value)
-  const { txid } = signTransaction(wif, params.transaction, true)
+  const account = await getCurrentAccount()
+  const network = await getNetwork()
+
+  const { txid } = signTransaction(account!, network, params.transaction, true)
 
   return { txid }
 }
diff --git a/src/lib/actions/sign-transaction.ts b/src/lib/actions/sign-transaction.ts
index 6c92c6c..a4daa76 100644
--- a/src/lib/actions/sign-transaction.ts
+++ b/src/lib/actions/sign-transaction.ts
@@ -1,21 +1,13 @@
 import { getAddress, getCurrentAccount, privateKey } from '../account'
 import connector from '../connector'
 import { signTransaction } from '../crypto'
+import { getNetwork } from '../network'
 
 export async function process(params: any, host: string) {
-  const wif = await getCurrentAccount().then((account) => privateKey.value)
+  const account = await getCurrentAccount()
+  const network = await getNetwork()
 
-  // let sigList = []
-  // for (let i = 0; i < params.list.length; i++) {
-  //   sigList[i] = sign(wif, params.list[i])
-  // }
-  if (params.returnsTransaction) {
-    const { txHex } = signTransaction(wif, params.transaction, params.returnsTransaction)
-
-    return { txHex }
-  }
-
-  const signature = signTransaction(wif, params.transaction, params.returnsTransaction)
+  const signature = signTransaction(account!, network, params.transaction)
 
   return { signature }
 }
diff --git a/src/lib/crypto.ts b/src/lib/crypto.ts
index 71a23ef..c7db6de 100644
--- a/src/lib/crypto.ts
+++ b/src/lib/crypto.ts
@@ -76,14 +76,21 @@ type ToSignTransaction = {
   path?: string
 }
 export const signTransaction = (
-  wif: string,
-  { txHex, scriptHex, inputIndex, satoshis, sigtype }: ToSignTransaction,
+  account: Account,
+  network: 'testnet' | 'mainnet',
+  { txHex, scriptHex, inputIndex, satoshis, sigtype, path }: ToSignTransaction,
   returnsTransaction: boolean = false
 ) => {
+  const mneObj = mvc.Mnemonic.fromString(account.mnemonic)
+  const hdpk = mneObj.toHDPrivateKey('', network)
+  const accountPath = account.path
+  // find out priv / pub according to path
+  const subPath = path || '0/0'
+  const privateKey = hdpk.deriveChild(`m/44'/${accountPath}'/0'/${subPath}`).privateKey
+  const publicKey = privateKey.toPublicKey()
+
   if (!sigtype) sigtype = mvc.crypto.Signature.SIGHASH_ALL | mvc.crypto.Signature.SIGHASH_FORKID
 
-  const privateKey = mvc.PrivateKey.fromWIF(wif)
-  const publicKey = privateKey.toPublicKey()
   const tx = new mvc.Transaction(txHex)
 
   let sighash = mvc.Transaction.Sighash.sighash(