feat(jellyfish-crypto): add fromAddress to convert eth address into s…

…cript (#2134)

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#### What this PR does / why we need it:
To get EVM script for an ETH address that is not owned by the same
wallet. Will be used on the `transferDomain` transaction builder that
only accepts script as address

#### Which issue(s) does this PR fixes?:
<!--
(Optional) Automatically closes linked issue when PR is merged.
Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
-->
Fixes DFC-170

#### Additional comments?:

packages/jellyfish-address/__tests__/eth.test.ts

@@ -0,0 +1,23 @@
+import { OP_CODES } from '@defichain/jellyfish-transaction'
+import { Eth } from '../src'
+
+const keypair = {
+  evmAddr: '0x0a06de8abc3f15359ec0dfe32394c8b8f09e828f',
+  checksumEvmAddr: '0x0a06DE8AbC3f15359EC0dfe32394C8B8f09e828F',
+  pubKeyUncompressed: '04e60942751bc776912cdc8cf11aa3ce33ce3ef6882ff93a9fafa0b968e6b926293a6913f9efae6362ce8ffd0b8a4ae45c3a6ccafacbab2192991125277d6710db'
+}
+
+it('should convert evm address to script', () => {
+  const evmScript = Eth.fromAddress(keypair.evmAddr)
+  expect(evmScript).toStrictEqual({
+    stack: [
+      OP_CODES.OP_16,
+      OP_CODES.OP_PUSHDATA_HEX_LE(keypair.evmAddr.substring(2))
+    ]
+  })
+})
+
+it('should return undefined script for invalid eth address', () => {
+  const evmScript = Eth.fromAddress('0xabc123')
+  expect(evmScript).toStrictEqual(undefined)
+})

packages/jellyfish-address/src/eth.ts

@@ -0,0 +1,25 @@
+import { OP_CODES, Script } from '@defichain/jellyfish-transaction'
+
+function validateAddress (address: string): boolean {
+  // https://github.com/ethers-io/ethers.js/blob/5210b68a7837654c6b84207a45e1e573d9472d1a/src.ts/address/address.ts#L123
+  const regex: RegExp = /^0x[a-fA-F0-9]{40}$/gm
+  return regex.test(address)
+}
+
+export const Eth = {
+  /**
+   * @param {string} address to convert into Script
+   * @return {Script} Script parsed from address
+   */
+  fromAddress (address: string): Script | undefined {
+    if (!validateAddress(address)) {
+      return undefined
+    }
+    return {
+      stack: [
+        OP_CODES.OP_16,
+        OP_CODES.OP_PUSHDATA_HEX_LE(address.substring(2))
+      ]
+    }
+  }
+}

packages/jellyfish-address/src/index.ts

@@ -14,6 +14,7 @@ export * from './p2pkh'
 export * from './p2sh'
 export * from './p2wpkh'
 export * from './p2wsh'
+export * from './eth'
 
 /**
  * When insist to use the "network" decoded from raw address, instead of passing one based on running application environment