Update ipfs-http-client (for node >= 14)

Updates the client library and API usage to work with the latest
version, and more importantly, with current node.js LTS.

lib/addresses.json

@@ -1,8 +1,8 @@
 {
   "1337": {
-    "Contributor": "0xB0D4afd8879eD9F52b28595d31B441D079B2Ca07",
-    "Contribution": "0x922D6956C99E12DFeB3224DEA977D0939758A1Fe",
-    "Token": "0x5081a39b8A5f0E35a8D959395a630b68B74Dd30f",
-    "Reimbursement": "0x1fA02b2d6A771842690194Cf62D91bdd92BfE28d"
+    "Contributor": "0x9fE46736679d2D9a65F0992F2272dE9f3c7fa6e0",
+    "Contribution": "0xDc64a140Aa3E981100a9becA4E685f962f0cF6C9",
+    "Token": "0x0165878A594ca255338adfa4d48449f69242Eb8F",
+    "Reimbursement": "0x2279B7A0a67DB372996a5FaB50D91eAA73d2eBe6"
   }
 }

lib/contracts/base.js

@@ -14,15 +14,6 @@ class Base {
     return this.contract.address;
   }
 
-  get ipfs () {
-    if (!this._ipfsAPI) { throw new Error('IPFS API not configured; please set an ipfs instance'); }
-    return this._ipfsAPI;
-  }
-
-  set ipfs (ipfsAPI) {
-    this._ipfsAPI = ipfsAPI;
-  }
-
   on (type, callback) {
     return this.contract.on(type, callback);
   }

lib/utils/ipfs.js

@@ -8,10 +8,10 @@ class IPFS {
       config = { host: 'localhost', port: '5001', protocol: 'http' };
     }
     this._config = config;
-    this._ipfsAPI = ipfsClient(config);
+    this._ipfsAPI = ipfsClient.create(config);
   }
 
-  catAndMerge (contractData, deserialize) {
+  async catAndMerge (contractData, deserialize) {
     let data = {...contractData}; // data from ethers.js is not extensible. this copy the attributes in a new object
     // if no hash details are found simply return the data; nothing to merge
     if (!data.hashSize || data.hashSize === 0) {
@@ -22,20 +22,19 @@ class IPFS {
 
     return this.cat(data.ipfsHash)
       .then(deserialize)
-      .then((attributes) => {
+      .then(attributes => {
         return Object.assign({}, data, attributes);
       });
   }
 
-  add (data) {
-    return this._ipfsAPI
-      .add(ipfsClient.Buffer.from(data))
-      .then((res) => {
-        return this.decodeHash(res[0].hash);
+  async add (data) {
+    return this._ipfsAPI.add(data)
+      .then(res => {
+        return this.decodeHash(res.path);
       });
   }
 
-  cat (hashData) {
+  async cat (hashData) {
     let ipfsHash = hashData; // default - if it is a string
     if (Object.prototype.hasOwnProperty.call(hashData, 'hashSize')) {
       ipfsHash = this.encodeHash(hashData);
@@ -43,7 +42,12 @@ class IPFS {
     if (this._config['gatewayUrl']) {
       return fetch(`${this._config['gatewayUrl']}/${ipfsHash}`).then(r => r.text());
     } else {
-      return this._ipfsAPI.cat(ipfsHash);
+      const res = this._ipfsAPI.cat(ipfsHash);
+      let str = '';
+      for await (const buffer of res) {
+        str += buffer.toString();
+      }
+      return Promise.resolve(str);
     }
   }
 
@@ -66,7 +70,7 @@ class IPFS {
   }
 
   encodeHash (hashData) {
-    let digest = ipfsClient.Buffer.from(hashData.hashDigest.slice(2), 'hex');
+    const digest = Buffer.from(hashData.hashDigest.slice(2), 'hex');
     return multihashes.encode(digest, hashData.hashFunction, hashData.hashSize);
   }
 }