get average storage price feature for payment

sdk/helper/lockToken.js

@@ -26,7 +26,7 @@ const lockToken = async (apiUrl, web3, payer, wCid, amount, size) => {
   const approveTx = await USDCInstance.methods
     .approve(
       gatewayContractAddress,
-      web3.utils.toWei((amount * multiplyFactor).toString(), 'ether'),
+      (web3.utils.toWei(amount, 'ether') * multiplyFactor).toString(),
     )
     .send(optionsObj)
 

sdk/helper/mcsApi.js

@@ -80,6 +80,48 @@ const getDealList = async (
   }
 }
 
+const sendRequest = async (apiLink) => {
+  try {
+    const response = await axios.get(apiLink)
+    return response.data
+  } catch (err) {
+    console.error(err)
+  }
+}
+
+const getAverageAmount = async (
+  apiUrl,
+  storageApiUrl,
+  walletAddress,
+  fileSize,
+  duration = 525,
+) => {
+  let fileSizeInGB = Number(fileSize) / 10 ** 9
+  let storageCostPerUnit = 0
+
+  const storageRes = await sendRequest(
+    `${storageApiUrl}/stats/storage?wallet_address=${walletAddress}`,
+  )
+  let cost = storageRes.data.average_price_per_GB_per_year
+    ? storageRes.data.average_price_per_GB_per_year.split(' ')
+    : []
+  if (cost[0]) storageCostPerUnit = cost[0]
+
+  const bilingRes = await sendRequest(
+    `${apiUrl}/billing/price/filecoin?wallet_address=${walletAddress}`,
+  )
+  let billingPrice = bilingRes.data
+
+  let price =
+    ((fileSizeInGB * duration * storageCostPerUnit * 5) / 365) * billingPrice
+
+  let numberPrice = Number(price).toFixed(9)
+  let averagePrice =
+    numberPrice > 0 ? Number(price * 3).toFixed(9) : '0.000000002'
+
+  return averagePrice
+}
+
 module.exports = {
   getParams,
   getFileStatus,
@@ -88,4 +130,5 @@ module.exports = {
   postMintInfo,
   postLockPayment,
   getDealList,
+  getAverageAmount,
 }

sdk/index.js

@@ -3,7 +3,12 @@ const Web3 = require('web3')
 
 const { mcsUpload } = require('./helper/upload')
 const { lockToken } = require('./helper/lockToken')
-const { getFileStatus, getDealList, getDealDetail } = require('./helper/mcsApi')
+const {
+  getFileStatus,
+  getDealList,
+  getDealDetail,
+  getAverageAmount,
+} = require('./helper/mcsApi')
 const { mint } = require('./helper/mint')
 
 class mcsSdk {
@@ -36,6 +41,8 @@ class mcsSdk {
     } else {
       this.apiUrl = 'https://mcs-api.filswan.com/api/v1'
     }
+
+    this.storageApiUrl = 'https://api.filswan.com'
   }
 
   /**
@@ -67,8 +74,30 @@ class mcsSdk {
    * @param {string} amount - pass amount as string to avoid BN precision errors
    * @returns {Object} payment transaction response
    */
-  makePayment = async (wCid, amount, size) =>
-    await lockToken(this.apiUrl, this.web3, this.publicKey, wCid, amount, size)
+  makePayment = async (wCid, amount, size) => {
+    let tx = {}
+    if (amount == '0' || amount == '') {
+      let averageAmount = await getAverageAmount(
+        this.apiUrl,
+        this.storageApiUrl,
+        this.publicKey,
+        size,
+      )
+
+      tx = await lockToken(
+        this.apiUrl,
+        this.web3,
+        this.publicKey,
+        wCid,
+        averageAmount,
+        size,
+      )
+    } else {
+      tx = lockToken(this.apiUrl, this.web3, this.publicKey, wCid, amount, size)
+    }
+
+    return tx
+  }
 
   /**
    * get filecoin status for file

sdk/package.json

@@ -1,6 +1,6 @@
 {
   "name": "js-mcs-sdk",
-  "version": "2.0.4",
+  "version": "2.1.0",
   "description": "A SDK for the MCS service. It provides a convenient interface for working with the MCS API from a web browser or Node.js",
   "homepage": "https://github.com/filswan/js-mcs-sdk",
   "main": "index.js",