Beta 7 with some repo names changed.

Client/node_modules/web3-eth-ens/src/lib/contentHash.js

@@ -0,0 +1,111 @@
+/*
+Adapted from ensdomains/ui
+https://github.com/ensdomains/ui/blob/3e62e440b53466eeec9dd1c63d73924eefbd88c1/src/utils/contents.js#L1-L85
+
+BSD 2-Clause License
+
+Copyright (c) 2019, Ethereum Name Service
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+var contentHash = require('content-hash');
+
+function decode(encoded) {
+  var decoded = null;
+  var protocolType = null;
+  var error = null;
+
+  if (encoded && encoded.error) {
+    return {
+      protocolType: null,
+      decoded: encoded.error
+    };
+  }
+  if (encoded) {
+    try {
+      decoded = contentHash.decode(encoded);
+      var codec = contentHash.getCodec(encoded);
+      if (codec === 'ipfs-ns') {
+        protocolType = 'ipfs';
+      } else if (codec === 'swarm-ns') {
+        protocolType = 'bzz';
+      } else if (codec === 'onion') {
+        protocolType = 'onion';
+      } else if (codec === 'onion3') {
+        protocolType = 'onion3';
+      } else {
+        decoded = encoded;
+      }
+    } catch (e) {
+      error = e.message;
+    }
+  }
+  return {
+    protocolType: protocolType,
+    decoded: decoded,
+    error: error
+  };
+}
+
+function encode(text) {
+  var content, contentType;
+  var encoded = false;
+  if (!!text) {
+    var matched = text.match(/^(ipfs|bzz|onion|onion3):\/\/(.*)/) || text.match(/\/(ipfs)\/(.*)/);
+    if (matched) {
+      contentType = matched[1];
+      content = matched[2];
+    }
+
+    try {
+      if (contentType === 'ipfs') {
+        if(content.length >= 4) {
+          encoded = '0x' + contentHash.fromIpfs(content);
+        }
+      } else if (contentType === 'bzz') {
+        if(content.length >= 4) {
+          encoded = '0x' + contentHash.fromSwarm(content);
+        }
+      } else if (contentType === 'onion') {
+        if(content.length === 16) {
+          encoded = '0x' + contentHash.encode('onion', content);
+        }
+      } else if (contentType === 'onion3') {
+        if(content.length === 56) {
+          encoded = '0x' + contentHash.encode('onion3', content);
+        }
+      } else {
+        throw new Error('Could not encode content hash: unsupported content type');
+      }
+    } catch (err) {
+      throw err;
+    }
+  }
+  return encoded;
+}
+
+module.exports = {
+  decode: decode,
+  encode: encode
+};