diff --git a/config/seeds.js b/config/seeds.js
index ae3403a..d8b84e5 100644
--- a/config/seeds.js
+++ b/config/seeds.js
@@ -1,65 +1,9 @@
-let contractCalls = {
-  Contributors: {
-    addContributor: [
-      // make sure to use an IPFS hash of one of the objects in ipfsContent
-      ['0x24dd2aedd8a9fe52ac071b3a23b2fc8f225c185e', '0x272bbfc66166f26cae9c9b96b7f9590e095f02edf342ac2dd71e1667a12116ca', 18, 32, true], // QmQyZJT9uikzDYTZLhhyVZ5ReZVCoMucYzyvDokDJsijhj
-      ['0xa502eb4021f3b9ab62f75b57a94e1cfbf81fd827', '0x9569ed44826286597982e40bbdff919c6b7752e29d13250efca452644e6b4b25', 18, 32, true] // QmYPu8zvtfDy18ZqHCviVxnKtxycw5UTJLJyk9oAEjWfnL
-    ]
-  },
-  Operator: {
-    addProposal: [
-      [2, 23, '0x1e1a168d736fc825213144973a8fd5b3cc9f37ad821a8b3d9c3488034bbf69d8', 18, 32], // QmQNA1hhVyL1Vm6HiRxXe9xmc6LUMBDyiNMVgsjThtyevs"
-      [3, 42, '0x1e1a168d736fc825213144973a8fd5b3cc9f37ad821a8b3d9c3488034bbf69d8', 18, 32], // QmQNA1hhVyL1Vm6HiRxXe9xmc6LUMBDyiNMVgsjThtyevs"
-      [3, 100, '0x1e1a168d736fc825213144973a8fd5b3cc9f37ad821a8b3d9c3488034bbf69d8', 18, 32] // QmQNA1hhVyL1Vm6HiRxXe9xmc6LUMBDyiNMVgsjThtyevs"
-    ],
-    vote: [
-      [1]
-    ]
-  }
-};
-let ipfsContent = [
-  {
-    "@context": "https://schema.kosmos.org",
-    "@type": "Contributor",
-    "kind": "person",
-    "name": "Râu Cao",
-    "url": "https://sebastian.kip.pe",
-    "accounts": [
-      {
-        "site": "github.com",
-        "username": "skddc",
-        "uid": 842,
-        "url": "https://github.com/skddc/"
-      },
-    ]
-  },
-  {
-    "@context": "https://schema.kosmos.org",
-    "@type": "Contributor",
-    "kind": "person",
-    "name": "Bumi",
-    "url": "https://michaelbumann.com",
-    "accounts": [
-      {
-        "site": "github.com",
-        "username": "bumi",
-        "uid": 318,
-        "url": "https://github.com/bumi/"
-      },
-    ]
-  },
-  {
-    "@context": "https://schema.kosmos.org",
-    "@type": "Contribution",
-    "contributor": {
-      "ipfs": "QmQ2ZZS2bXgneQfKtVTVxe6dV7pcJuXnTeZJQtoVUFsAtJ"
-    },
-    "kind": "dev",
-    "description": "hacking hacking on kredits",
-    "url": "https://github.com/67P/kredits-web/pull/11",
-    "details": {}
-  }
-
-]
-
-module.exports = { contractCalls, ipfsContent };
+let contractCalls = [
+  ['Contributor', 'add', [{ account: '0x7e8f313c56f809188313aa274fa67ee58c31515d', name: 'bumi', isCore: true, kind: 'preson', url: '', github_username: 'bumi', github_uid: 318, wiki_username: 'bumi' }, {gasLimit: 200000}]],
+  ['Contributor', 'add', [{ account: '0xa502eb4021f3b9ab62f75b57a94e1cfbf81fd827', name: 'raucau', isCore: true, kind: 'person', url: '', github_username: 'skddc', github_uid: 842, wiki_username: 'raucau' }, {gasLimit: 200000}]],
+  ['Operator', 'addProposal', [{ contributorId: 2, amount: 42, kind: 'code', description: 'runs the seeds', url: '' }, {gasLimit: 350000}]],
+  ['Operator', 'addProposal', [{ contributorId: 3, amount: 23, kind: 'code', description: 'runs the seeds', url: '' }, {gasLimit: 350000}]],
+  ['Operator', 'addProposal', [{contributorId: 3, amount: 100, kind: 'code', description: 'hacks on kredits', url: '' }, {gasLimit: 350000}]],
+  ['Operator', 'vote', ['1', {gasLimit: 250000}]]
+];
+module.exports = { contractCalls };
diff --git a/lib/addresses/Contributors.json b/lib/addresses/Contributors.json
index 2ccea3a..7c8cb62 100644
--- a/lib/addresses/Contributors.json
+++ b/lib/addresses/Contributors.json
@@ -1 +1 @@
-{"100":"0xa7fc9b1f678c41396b53904f94f50a42ff44d826"}
\ No newline at end of file
+{"42":"0x205fe1b3dac678b594c5f0535e7d158e38591f93","100":"0xa7fc9b1f678c41396b53904f94f50a42ff44d826"}
\ No newline at end of file
diff --git a/lib/addresses/Operator.json b/lib/addresses/Operator.json
index 0ef267e..b865526 100644
--- a/lib/addresses/Operator.json
+++ b/lib/addresses/Operator.json
@@ -1 +1 @@
-{"100":"0x95d3bd7d136bb0b7ac9988097e964236f8a9976e"}
\ No newline at end of file
+{"42":"0x9fd66ee78a5ebe86006f12b37ff59c63f9caa15b","100":"0x95d3bd7d136bb0b7ac9988097e964236f8a9976e"}
\ No newline at end of file
diff --git a/lib/addresses/Registry.json b/lib/addresses/Registry.json
index 8a5492a..8bdcb57 100644
--- a/lib/addresses/Registry.json
+++ b/lib/addresses/Registry.json
@@ -1 +1 @@
-{"100":"0x513f8e80a8fbb9fa188320ecf231efcf2f6da9c5"}
\ No newline at end of file
+{"42":"0xc270e6ea4fe303df9f1a3d4a132ac425264082e7","100":"0x513f8e80a8fbb9fa188320ecf231efcf2f6da9c5"}
\ No newline at end of file
diff --git a/lib/addresses/Token.json b/lib/addresses/Token.json
index 658df01..9242b73 100644
--- a/lib/addresses/Token.json
+++ b/lib/addresses/Token.json
@@ -1 +1 @@
-{"100":"0x3fc29fbe40c2d0ca78c7e81342f00226650fe2ad"}
\ No newline at end of file
+{"42":"0xf71ccf7ab48044ef9ae0b5e6983dbd3266b78b36","100":"0x3fc29fbe40c2d0ca78c7e81342f00226650fe2ad"}
\ No newline at end of file
diff --git a/lib/contracts/contributor.js b/lib/contracts/contributor.js
index 127e2dc..1845730 100644
--- a/lib/contracts/contributor.js
+++ b/lib/contracts/contributor.js
@@ -34,7 +34,7 @@ class Contributor extends Base {
       });
   }
 
-  add(contributorAttr) {
+  add(contributorAttr, callOptions = {}) {
     let json = ContributorSerializer.serialize(contributorAttr);
     // TODO: validate against schema
 
@@ -42,14 +42,14 @@ class Contributor extends Base {
       .add(json)
       .then((ipfsHashAttr) => {
         let contributor = [
-          contributorAttr.address,
+          contributorAttr.account,
           ipfsHashAttr.hashDigest,
           ipfsHashAttr.hashFunction,
           ipfsHashAttr.hashSize,
           contributorAttr.isCore,
         ];
 
-        return this.functions.addContributor(...contributor);
+        return this.functions.addContributor(...contributor, callOptions);
       });
   }
 }
diff --git a/lib/contracts/index.js b/lib/contracts/index.js
index 9fd06ae..a4a1792 100644
--- a/lib/contracts/index.js
+++ b/lib/contracts/index.js
@@ -1,5 +1,6 @@
 module.exports = {
   Contributors: require('./contributor'),
   Operator: require('./operator'),
-  Token: require('./token')
-}
+  Token: require('./token'),
+  Registry: require('./registry')
+};
diff --git a/lib/contracts/operator.js b/lib/contracts/operator.js
index bcb31b8..83a5eae 100644
--- a/lib/contracts/operator.js
+++ b/lib/contracts/operator.js
@@ -34,7 +34,7 @@ class Operator extends Base {
       });
   }
 
-  addProposal(proposalAttr) {
+  addProposal(proposalAttr, callOptions = {}) {
     let json = ContributionSerializer.serialize(proposalAttr);
     // TODO: validate against schema
 
@@ -49,7 +49,7 @@ class Operator extends Base {
           ipfsHashAttr.hashSize,
         ];
 
-        return this.functions.addProposal(...proposal);
+        return this.functions.addProposal(...proposal, callOptions);
       });
   }
 }
diff --git a/lib/contracts/registry.js b/lib/contracts/registry.js
new file mode 100644
index 0000000..a3af768
--- /dev/null
+++ b/lib/contracts/registry.js
@@ -0,0 +1,6 @@
+const Base = require('./base');
+
+class Registry extends Base {
+}
+
+module.exports = Registry;
diff --git a/lib/kredits.js b/lib/kredits.js
index 4e37b9b..9062d69 100644
--- a/lib/kredits.js
+++ b/lib/kredits.js
@@ -1,17 +1,15 @@
 const ethers = require('ethers');
 const RSVP = require('rsvp');
 
-const abis = {
+const ABIS = {
   Contributors: require('./abis/Contributors.json'),
   Operator: require('./abis/Operator.json'),
   Registry: require('./abis/Registry.json'),
   Token: require('./abis/Token.json')
 };
-const addresses = {
-  Registry: require('./addresses/Registry.json')
-};
+const RegistryAddress = require('./addresses/Registry.json');
 
-const contracts = require('./contracts');
+const Contracts = require('./contracts');
 const IPFS = require('./utils/ipfs')
 
 // Helpers
@@ -21,65 +19,50 @@ function capitalize(word) {
 }
 
 class Kredits {
-  static get contractNames() {
-    return Object.keys(abis);
-  }
 
   constructor(provider, signer, addresses) {
     this.provider = provider;
     this.signer = signer;
 
-    // Initialize our registry contract
-    this.addresses = addresses;
+    // by default we only need the registry address.
+    // the rest is loaded from there in the init() function
+    this.addresses = addresses || {Registry: RegistryAddress[this.provider.chainId.toString()]}; // chaiID must be a string
+    this.abis = ABIS;
     this.contracts = {};
     this.ipfs = new IPFS();
   }
 
-  static setup(provider, signer, ipfsConfig = null) {
-    let ipfsAPI = new IPFS(ipfsConfig);
+  init(names) {
+    let contractsToLoad = names || Object.keys(ABIS);
+    let addressPromises = contractsToLoad.map((contractName) => {
+      return this.Registry.functions.getProxyFor(contractName).then((address) => {
+        this.addresses[contractName] = address;
+      }).catch((error) => {
+        throw new Error(`Failed to get address for ${contractName} from registry at ${this.Registry.contract.address}
+          - correct registry? does it have version entry? - ${error.message}`
+        );
+      });
+    });
+    return RSVP.all(addressPromises).then(() => { return this });
+  }
 
-    return ipfsAPI._ipfsAPI.id().catch((error) => {
+  static setup(provider, signer, ipfsConfig = null) {
+    console.log('Kredits.setup() is deprecated use new Kredits().init() instead');
+    let ipfs = new IPFS(ipfsConfig);
+
+    return ipfs._ipfsAPI.id().catch((error) => {
       throw new Error(`IPFS node not available; config: ${JSON.stringify(ipfsConfig)} - ${error.message}`);
     }).then(() => {
 
-      let registryContract = this.initRegistryContract(provider);
-
-      let addresses = Kredits.contractNames.reduce((mem, name) => {
-        let contractName = capitalize(name);
-        mem[contractName] = registryContract.functions.getProxyFor(contractName).catch((error) => {
-          throw new Error(`Failed to get address for ${contractName} from registry at ${registryContract.address}
-            - correct registry? does it have version entry? - ${error.message}`
-          );
-        });
-        return mem;
-      }, {});
-
-      return RSVP.hash(addresses)
-        .then((addresses) => {
-          let kredits = new Kredits(provider, signer, addresses);
-          kredits.ipfs = ipfsAPI;
-          return kredits;
-        });
+      return new Kredits(provider, signer).init().then((kredits) => {
+        kredits.ipfs = ipfs;
+        return kredits;
+      });
     });
   }
 
-  static initRegistryContract(provider) {
-    let address = addresses['Registry'][provider.chainId];
-    if (!address) {
-      throw new Error(`Registry address not found; invalid network?
-        requested network: ${provider.chainId}
-        supported networks: ${Object.keys(addresses['Registry'])}
-      `);
-    }
-    provider.getCode(address).then((code) => {
-      // not sure if we always get the same return value of the code is not available
-      // that's why checking if it is < 5 long
-      if (code === '0x00' || code.length < 5) {
-        throw new Error(`Registry not found at ${address} on network ${provider.chainId}`);
-      }
-    });
-    let abi = abis['Registry'];
-    return new ethers.Contract(address, abi, provider);
+  get Registry() {
+    return this.contractFor('registry');
   }
 
   get Contributor() {
@@ -101,14 +84,16 @@ class Kredits {
       return this.contracts[name];
     }
 
-    let contractName = capitalize(name);
-    let address = this.addresses[contractName];
-    if (!address || !abis[contractName]) {
+    const contractName = capitalize(name);
+    const address = this.addresses[contractName];
+    const abi = this.abis[contractName];
+    if (!address || !abi) {
       throw new Error(`Address or ABI not found for ${contractName}`);
     }
+
     let signerOrProvider = this.signer || this.provider;
-    let contract = new ethers.Contract(address, abis[contractName], signerOrProvider);
-    this.contracts[name] = new contracts[contractName](contract);
+    let contract = new ethers.Contract(address, abi, signerOrProvider);
+    this.contracts[name] = new Contracts[contractName](contract);
     this.contracts[name].ipfs = this.ipfs;
 
     return this.contracts[name];
diff --git a/lib/serializers/contribution.js b/lib/serializers/contribution.js
index e57365c..149b077 100644
--- a/lib/serializers/contribution.js
+++ b/lib/serializers/contribution.js
@@ -41,6 +41,7 @@ class Contribution {
       kind,
       description,
       url,
+      details
     } = deserialized;
 
     let data = {
@@ -51,7 +52,7 @@ class Contribution {
       },
       kind,
       description,
-      "details": {}
+      "details": details || {}
     };
 
     if (url) {
diff --git a/lib/serializers/contributor.js b/lib/serializers/contributor.js
index 985641d..d426370 100644
--- a/lib/serializers/contributor.js
+++ b/lib/serializers/contributor.js
@@ -35,6 +35,7 @@ class Contributor {
       name,
       kind,
       url,
+      accounts,
       github_uid,
       github_username,
       wiki_username,
diff --git a/package-lock.json b/package-lock.json
index e3024a1..070e4e2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -106,10 +106,10 @@
       "integrity": "sha512-XA5o5dsNw8MhyW0Q7MWXJWc4oOzZKbdsEJq45h7c8q/d9DwWZ5F2ugUc1PuMLPGsUnphCt/cNDHu8JeBbxf1qA==",
       "dev": true
     },
-    "async": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+    "async-each-series": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/async-each-series/-/async-each-series-1.1.0.tgz",
+      "integrity": "sha1-9C/YFV048hpbjqB8KOBj7RcAsTg=",
       "dev": true
     },
     "babel-code-frame": {
@@ -4230,6 +4230,16 @@
       "resolved": "https://registry.npmjs.org/promisify-es6/-/promisify-es6-1.0.3.tgz",
       "integrity": "sha512-N9iVG+CGJsI4b4ZGazjwLnxErD2d9Pe4DPvvXSxYA9tFNu8ymXME4Qs5HIQ0LMJpNM7zj+m0NlNnNeqFpKzqnA=="
     },
+    "promptly": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/promptly/-/promptly-3.0.3.tgz",
+      "integrity": "sha512-EWnzOsxVKUjqKeE6SStH1/cO4+DE44QolaoJ4ojGd9z6pcNkpgfJKr1ncwxrOFHSTIzoudo7jG8y0re30/LO1g==",
+      "dev": true,
+      "requires": {
+        "pify": "3.0.0",
+        "read": "1.0.7"
+      }
+    },
     "protocol-buffers-schema": {
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/protocol-buffers-schema/-/protocol-buffers-schema-3.3.2.tgz",
@@ -4343,6 +4353,15 @@
         }
       }
     },
+    "read": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/read/-/read-1.0.7.tgz",
+      "integrity": "sha1-s9oZvQUkMal2cdRKQmNK33ELQMQ=",
+      "dev": true,
+      "requires": {
+        "mute-stream": "0.0.7"
+      }
+    },
     "read-chunk": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/read-chunk/-/read-chunk-2.1.0.tgz",
@@ -5401,6 +5420,14 @@
             "recast": "0.12.9",
             "temp": "0.8.3",
             "write-file-atomic": "1.3.4"
+          },
+          "dependencies": {
+            "async": {
+              "version": "1.5.2",
+              "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+              "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+              "dev": true
+            }
           }
         },
         "recast": {
diff --git a/package.json b/package.json
index b2e9257..84ad412 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   },
   "scripts": {
     "build-json": "truffle compile && node ./scripts/build-json.js",
-    "bootstrap": "truffle migrate --reset && truffle exec scripts/seeds.js && npm run build-json",
+    "bootstrap": "truffle migrate --reset && npm run build-json && truffle exec scripts/seeds.js",
     "ganache": "ganache-cli -p 7545 -i 100 --db=./.ganache-db -m kredits",
     "dev": "truffle migrate && npm run build-json",
     "test": "echo \"Error: no test specified\" && exit 1"
@@ -24,12 +24,14 @@
   },
   "homepage": "https://github.com/67P/truffle-kredits#readme",
   "devDependencies": {
+    "async-each-series": "^1.1.0",
     "ganache-cli": "^6.0.3",
+    "promptly": "^3.0.3",
     "truffle": "^4.1.3",
     "zeppelin-solidity": "^1.7.0"
   },
   "dependencies": {
-    "ethers": "^3.0.15",
+    "ethers": "3.0.15",
     "ipfs-api": "^19.0.0",
     "rsvp": "^4.8.2"
   }
diff --git a/scripts/add-contributor.js b/scripts/add-contributor.js
index e003bd9..34bb282 100644
--- a/scripts/add-contributor.js
+++ b/scripts/add-contributor.js
@@ -1,47 +1,50 @@
 const Registry = artifacts.require('./Registry.sol');
-const Operator = artifacts.require('./Operator.sol');
-const Contributors = artifacts.require('./Contributors.sol');
+const promptly = require('promptly');
+const bs58 = require('bs58');
 
-var bs58 = require('bs58');
+const ethers = require('ethers');
+const Kredits = require('../lib/kredits');
 
-function getBytes32FromMultiash(multihash) {
-  const decoded = bs58.decode(multihash);
-
-  return {
-    digest: `0x${decoded.slice(2).toString('hex')}`,
-    hashFunction: decoded[0],
-    size: decoded[1],
-  };
+async function prompt(message, options) {
+  if (!options) {
+    options = {default: ''}
+  }
+  return await promptly.prompt(message, options);
 }
 
 module.exports = function(callback) {
   Registry.deployed().then(async (registry) => {
-    var operatorAddress = await registry.getProxyFor('Operator');
-    var contributorsAddress = await registry.getProxyFor('Contributors');
 
-    var operator = await Operator.at(operatorAddress);
-    var contributors = await Contributors.at(contributorsAddress);
+    const networkId = parseInt(web3.version.network);
+    const provider = new ethers.providers.Web3Provider(
+      web3.currentProvider, { chainId: networkId }
+    );
+    const kredits = await Kredits.setup(provider, provider.getSigner());
 
-    let contributorToAddAddress = process.argv[4];
-    if(!contributorToAddAddress) {
-      console.log('please provide an address');
-      proxess.exit();
-    }
-    let ipfsHash = process.argv[5] || 'QmQyZJT9uikzDYTZLhhyVZ5ReZVCoMucYzyvDokDJsijhj';
-    let contributorMultihash = getBytes32FromMultiash(ipfsHash);
-    let isCore = true;
-    let contributorResult = await contributors.addContributor(contributorToAddAddress, contributorMultihash.digest, contributorMultihash.hashFunction, contributorMultihash.size, isCore);
-    console.log('Contributor added, tx: ', contributorResult.tx);
+    console.log(`Using contributors at: ${kredits.Contributor.contract.address}`);
 
-    let contributorId = await contributors.getContributorIdByAddress(contributorToAddAddress);
-    let proposalMultihash = getBytes32FromMultiash('QmQNA1hhVyL1Vm6HiRxXe9xmc6LUMBDyiNMVgsjThtyevs');
-    let proposalResult = await operator.addProposal(contributorId, 23, proposalMultihash.digest, proposalMultihash.hashFunction, proposalMultihash.size);
-    console.log('Proposal added, tx: ', proposalResult.tx);
+    let contributorAttributes = {
+      account: await prompt('Contributor address: ', {}),
+      name: await prompt('Name: '),
+      isCore: await prompt('core? y/n') === 'y',
+      kind: await prompt('Kind (default person): ', {default: 'person'}),
+      url: await prompt('URL: '),
+      github_username: await prompt('GitHub username: '),
+      github_uid: await prompt('GitHub UID: '),
+      wiki_username: await prompt('Wiki username: '),
+    };
 
-    let proposalId = await operator.proposalsCount();
-    let votingResult = await operator.vote(proposalId.toNumber()-1);
-    console.log('Voted for proposal', proposalId.toString(), votingResult.tx);
+    console.log("\nAdding contributor:");
+    console.log(contributorAttributes);
+
+    kredits.Contributor.add(contributorAttributes, {gasLimit: 250000}).then((result) => {
+      console.log("\n\nResult:");
+      console.log(result);
+      callback();
+    }).catch((error) => {
+      console.log('Failed to create contributor');
+      callback(error);
+    });
 
-    callback();
   });
 }
diff --git a/scripts/add-proposal.js b/scripts/add-proposal.js
index 35a8c55..6dbe117 100644
--- a/scripts/add-proposal.js
+++ b/scripts/add-proposal.js
@@ -1,8 +1,9 @@
 const Registry = artifacts.require('./Registry.sol');
 const Operator = artifacts.require('./Operator.sol');
 const Contributors = artifacts.require('./Contributors.sol');
+const promptly = require('promptly');
 
-var bs58 = require('bs58');
+const bs58 = require('bs58');
 
 function getBytes32FromMultiash(multihash) {
   const decoded = bs58.decode(multihash);
@@ -22,12 +23,9 @@ module.exports = function(callback) {
     var operator = await Operator.at(operatorAddress);
     var contributors = await Contributors.at(contributorsAddress);
 
-    let recipientAddress = process.argv[4];
-    if(!recipientAddress) {
-      console.log('please provide an address');
-      process.exit();
-    }
-    let ipfsHash = process.argv[5] || 'QmQNA1hhVyL1Vm6HiRxXe9xmc6LUMBDyiNMVgsjThtyevs';
+    let recipientAddress = await promptly.prompt('Contributor address: ');
+    let ipfsHash = await promptly.prompt('IPFS hash (blank for default): ', { default: 'QmQNA1hhVyL1Vm6HiRxXe9xmc6LUMBDyiNMVgsjThtyevs' });
+
     let multihash = getBytes32FromMultiash(ipfsHash);
 
     let contributorId = await contributors.getContributorIdByAddress(recipientAddress);
diff --git a/scripts/build-json.js b/scripts/build-json.js
index 2a426e5..3bc2855 100644
--- a/scripts/build-json.js
+++ b/scripts/build-json.js
@@ -18,14 +18,15 @@ files.forEach((fileName) => {
   let abiFile = path.join(abisPath, `${fileName}.json`);
   fs.writeFileSync(abiFile, JSON.stringify(file.abi));
 
-  let addresseFile = path.join(addressesPath, `${fileName}.json`);
-  let addresses = Object.keys(file.networks)
-    .reduce((addresses, key) => {
-      addresses[key] = file.networks[key].address;
-      return addresses;
-    }, {});
-  fs.writeFileSync(addresseFile, JSON.stringify(addresses));
-
+  if (fileName === 'Registry') {
+    let addresseFile = path.join(addressesPath, `${fileName}.json`);
+    let addresses = Object.keys(file.networks)
+      .reduce((addresses, key) => {
+        addresses[key] = file.networks[key].address;
+        return addresses;
+      }, {});
+    fs.writeFileSync(addresseFile, JSON.stringify(addresses));
+  }
 });
 
 console.log("Don't forget to reaload the JSON files from your application; i.e. restart kredits-web");
diff --git a/scripts/cli.js b/scripts/cli.js
index 20ac150..f1c733f 100644
--- a/scripts/cli.js
+++ b/scripts/cli.js
@@ -1,39 +1,45 @@
 const REPL = require('repl');
+const promptly = require('promptly');
+
+const ethers = require('ethers');
+const Kredits = require('../lib/kredits');
 
 module.exports = function(callback) {
   const Registry = artifacts.require('./Registry.sol');
   Registry.deployed().then(async (registry) => {
-    let contractName = process.argv[4];
-    let method = process.argv[5];
-    let args = process.argv.slice(6);
-
-    if (!contractName) {
-      console.log("Usage:");
-      console.log("  truffle exec scripts/cli.js <Contract name> <method to call> [<optional> <arguments>]");
-      callback();
-      return;
+    let contractName = await promptly.prompt('Contract Name: ');
+    let method = await promptly.prompt('Function: ');
+    let argumentInput = await promptly.prompt('Arguments (comma separated): ', { default: '' });
+    let args = [];
+    if (argumentInput !== '') {
+      args = argumentInput.split(',').map(a => a.trim());
     }
 
-    let contractAddress = await registry.getProxyFor(contractName);
-    console.log(`Using ${contractName} at ${contractAddress}`);
-    let contract = await artifacts.require(`./${contractName}`).at(contractAddress);
+    const networkId = parseInt(web3.version.network);
+    const provider = new ethers.providers.Web3Provider(
+      web3.currentProvider, { chainId: networkId }
+    );
+    const kredits = await Kredits.setup(provider, provider.getSigner());
+
+    const contract = kredits[contractName].contract;
+    console.log(`Using ${contractName} at ${contract.address}`);
+    console.log(`Calling ${method} with ${JSON.stringify(args)}`);
 
     if (!contract[method]) {
       callback(new Error(`Method ${method} is not defined on ${contractName}`));
       return;
     }
-    console.log(`Calling ${method} with ${JSON.stringify(args)}`);
 
     contract[method](...args).then((result) => {
       console.log("\nResult:");
       console.log(result);
 
       console.log("\nStartig a REPL. (type .exit to exit)");
-      console.log(`defined variables: result, ${contractName}, web3`);
+      console.log(`defined variables: result, ${contractName}, kredis`);
       let r = REPL.start();
       r.context.result = result;
       r.context[contractName] = contract;
-      r.context.web3 = web3;
+      r.context.kredits = kredits;
 
       r.on('exit', () => {
         console.log('Bye');
diff --git a/scripts/multihash.js b/scripts/multihash.js
deleted file mode 100644
index bf59b2f..0000000
--- a/scripts/multihash.js
+++ /dev/null
@@ -1,35 +0,0 @@
-var bs58 = require('bs58');
-
-function getBytes32FromMultiash(multihash) {
-  const decoded = bs58.decode(multihash);
-
-  return {
-    digest: `0x${decoded.slice(2).toString('hex')}`,
-    hashFunction: decoded[0],
-    size: decoded[1],
-  };
-}
-
-
-function getMultihashFromBytes32(multihash) {
-  const { digest, hashFunction, size } = multihash;
-  if (size === 0) return null;
-
-  // cut off leading "0x"
-  const hashBytes = Buffer.from(digest.slice(2), 'hex');
-
-  // prepend hashFunction and digest size
-  //const multihashBytes = new (hashBytes.constructor)(2 + hashBytes.length);
-  const multihashBytes = new Buffer(2 + hashBytes.length);
-
-  console.log(hashBytes.constructor);
-
-  multihashBytes[0] = hashFunction;
-  multihashBytes[1] = size;
-  multihashBytes.set(hashBytes, 2);
-
-  return bs58.encode(multihashBytes);
-}
-
-var m = getBytes32FromMultiash(process.argv[2]);
-console.log(m)
diff --git a/scripts/seeds.js b/scripts/seeds.js
index 69d79fa..7e9fd9a 100644
--- a/scripts/seeds.js
+++ b/scripts/seeds.js
@@ -1,34 +1,39 @@
 const path = require('path');
 const seeds = require(path.join(__dirname, '..', '/config/seeds.js'));
-const IPFS = require('ipfs-api');
 
-var ipfs = IPFS({host: 'localhost', port: '5001', protocol: 'http'})
+const ethers = require('ethers');
+const Kredits = require('../lib/kredits');
+
+const each = require('async-each-series');
 
 module.exports = function(callback) {
   const Registry = artifacts.require('./Registry.sol');
 
-  const contracts = {};
-  Registry.deployed().then((registry) => {
-    Object.keys(seeds.contractCalls).forEach(async (contract) => {
-      var address = await registry.getProxyFor(contract);
-      console.log(`Using ${contract} at ${address}`);
-      contracts[contract] = await artifacts.require(contract).at(address);
+  Registry.deployed().then(async (registry) => {
 
-      Object.keys(seeds.contractCalls[contract]).forEach((method) => {
-        seeds.contractCalls[contract][method].forEach((args) => {
-          console.log(`[Sending] ${contract}.#${method}(${JSON.stringify(args)})`);
-          contracts[contract][method](...args).then((result) => {
-            console.log(`[Result] ${contract}.${method}(${JSON.stringify(args)}) => ${result.tx}`);
-          });
-        });
+    const networkId = parseInt(web3.version.network);
+    const provider = new ethers.providers.Web3Provider(
+      web3.currentProvider, { chainId: networkId }
+    );
+    const kredits = await Kredits.setup(provider, provider.getSigner());
+
+    each(seeds.contractCalls, (call, next) => {
+      let [contractName, method, args] = call;
+      let contractWrapper = kredits[contractName];
+      let func;
+      if (contractWrapper[method]) {
+        func = contractWrapper[method];
+      } else {
+        func = contractWrapper.functions[method];
+      }
+      func.apply(contractWrapper, args).then((result) => {
+        console.log(`[OK] kredits.${contractName}.${method}(${JSON.stringify(args)}) => ${result.hash}`);
+        next();
+      }).catch((error) => {
+        console.log(`[FAILD] kredits.${contractName}.${method}(${JSON.stringify(args)})`);
+        callback(error)
       });
-    });
+    }, () => { console.log("\nDone!") });
+
   });
-
-
-  seeds.ipfsContent.forEach((content) => {
-    ipfs.add(new ipfs.Buffer(JSON.stringify(content))).then((result) => { console.log(`[IPFS] added ${result[0].hash}`) });
-  });
-
-  callback();
 }
diff --git a/scripts/send-funds.js b/scripts/send-funds.js
index 262e286..eff869a 100644
--- a/scripts/send-funds.js
+++ b/scripts/send-funds.js
@@ -1,12 +1,12 @@
+const promptly = require('promptly');
+
+module.exports = async function(callback) {
+  let recipient = await promptly.prompt('Recipient address: ');
+  let amount = await promptly.prompt('Amount: ', {default: '1'});
+  amount = parseInt(amount);
+
+  console.log(`sending ${amount} ETH from ${web3.eth.accounts[0]} to ${recipient}`);
 
-module.exports = function(callback) {
-  let recipient = process.argv[4];
-  if (!recipient) {
-    console.log('Please provide a recipient address');
-    process.exit();
-  }
-  let amount = parseInt(process.argv[5]) || 1;
-  console.log(recipient);
   web3.eth.sendTransaction({to: recipient, value: web3.toWei(amount), from: web3.eth.accounts[0]}, console.log);
 
   callback();
diff --git a/truffle.js b/truffle.js
index f591088..77e88c5 100644
--- a/truffle.js
+++ b/truffle.js
@@ -5,6 +5,11 @@ module.exports = {
       host: "127.0.0.1",
       port: 7545,
       network_id: "*" // Match any network id
+    },
+    kovan: {
+      host: "127.0.0.1",
+      port: 8545,
+      network_id: "42"
     }
   }
 };