From 07dc68b810d0e872ef4624c9c2e92d436af42fd9 Mon Sep 17 00:00:00 2001
From: ironbeer <7997273+ironbeer@users.noreply.github.com>
Date: Fri, 10 Mar 2023 19:27:24 +0900
Subject: [PATCH 1/2] Updated artifacts

---
 .../OASMultiTransfer.json                     | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 artifacts/contracts/util/OASMultiTransfer.sol/OASMultiTransfer.json

diff --git a/artifacts/contracts/util/OASMultiTransfer.sol/OASMultiTransfer.json b/artifacts/contracts/util/OASMultiTransfer.sol/OASMultiTransfer.json
new file mode 100644
index 0000000..babf3b8
--- /dev/null
+++ b/artifacts/contracts/util/OASMultiTransfer.sol/OASMultiTransfer.json
@@ -0,0 +1,50 @@
+{
+  "_format": "hh-sol-artifact-1",
+  "contractName": "OASMultiTransfer",
+  "sourceName": "contracts/util/OASMultiTransfer.sol",
+  "abi": [
+    {
+      "inputs": [],
+      "name": "InvalidArgument",
+      "type": "error"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "TransferFailed",
+      "type": "error"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "tos",
+          "type": "address[]"
+        },
+        {
+          "internalType": "uint256[]",
+          "name": "amounts",
+          "type": "uint256[]"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [],
+      "stateMutability": "payable",
+      "type": "function"
+    }
+  ],
+  "bytecode": "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",
+  "deployedBytecode": "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",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}

From 7d79301e75a55ad6e999e64dea1206283432d9b9 Mon Sep 17 00:00:00 2001
From: ironbeer <7997273+ironbeer@users.noreply.github.com>
Date: Fri, 10 Mar 2023 19:27:52 +0900
Subject: [PATCH 2/2] Added OASMultiTransfer test

---
 test/util/OASMultiTransfer.spec.ts | 55 ++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 test/util/OASMultiTransfer.spec.ts

diff --git a/test/util/OASMultiTransfer.spec.ts b/test/util/OASMultiTransfer.spec.ts
new file mode 100644
index 0000000..cda8dcf
--- /dev/null
+++ b/test/util/OASMultiTransfer.spec.ts
@@ -0,0 +1,55 @@
+import { BigNumber } from 'ethers'
+import { ethers } from 'hardhat'
+import { Contract } from 'ethers'
+import { SignerWithAddress as Account } from '@nomiclabs/hardhat-ethers/signers'
+import { expect } from 'chai'
+
+const parseUnits = ethers.utils.parseUnits
+
+const expectBalance = async (address: string, ether: BigNumber) => {
+  const actual = await ethers.provider.getBalance(address)
+  expect(actual).to.equal(ether)
+}
+
+describe('OASMultiTransfer', () => {
+  let signer: Account
+  let contract: Contract
+
+  before(async () => {
+    signer = (await ethers.getSigners())[0]
+  })
+
+  beforeEach(async () => {
+    const factory = await ethers.getContractFactory('OASMultiTransfer')
+    contract = (await factory.deploy()).connect(signer)
+  })
+
+  const tos = [
+    '0xad2148f0E70f450974713AFcFD6991f03e14084A',
+    '0x0000000000000000000000000000000000000000',
+    '0xAFFe1007893bFCa4fB86f204a6C812e83C703452',
+  ]
+  const amounts = [parseUnits('1'), parseUnits('2'), parseUnits('3')]
+
+  it('normally', async () => {
+    // check initial balance
+    await expectBalance(signer.address, parseUnits('10000'))
+
+    // transfer
+    await contract.transfer(tos, amounts, { value: parseUnits('100') })
+
+    // check recipient balances
+    await expectBalance(tos[0], amounts[0])
+    await expectBalance(tos[1], parseUnits('0'))
+    await expectBalance(tos[2], amounts[2])
+
+    // check refund
+    await expectBalance(contract.address, parseUnits('0'))
+    await expectBalance(signer.address, parseUnits('9996'))
+  })
+
+  it('value is shortage', async () => {
+    const tx = contract.transfer(tos, amounts, { value: parseUnits('1') })
+    await expect(tx).to.be.revertedWith(`TransferFailed("${tos[2]}", ${amounts[2]})`)
+  })
+})