diff --git a/web3.js/examples/get-balance.js b/web3.js/examples/get-balance.js
new file mode 100644
index 0000000000..0ed664c908
--- /dev/null
+++ b/web3.js/examples/get-balance.js
@@ -0,0 +1,19 @@
+/*
+ Fetch the balance of an account
+*/
+
+//eslint-disable-next-line import/no-commonjs
+const solanaWeb3 = require('..');
+//const solanaWeb3 = require('@solana/web3.js');
+
+const account = new solanaWeb3.Account();
+
+let url;
+url = 'http://localhost:8899';
+//url = 'http://master.testnet.solana.com:8899';
+const connection = new solanaWeb3.Connection(url);
+
+connection.getBalance(account.publicKey)
+.then((balance) => {
+  console.log(`${account.publicKey} has a balance of ${balance}`);
+});
diff --git a/web3.js/flow-typed/jayson.js b/web3.js/flow-typed/jayson.js
new file mode 100644
index 0000000000..1fdd3da8b9
--- /dev/null
+++ b/web3.js/flow-typed/jayson.js
@@ -0,0 +1,4 @@
+declare module 'jayson/lib/client/browser' {
+  declare module.exports: any;
+}
+
diff --git a/web3.js/flow-typed/node-fetch.js b/web3.js/flow-typed/node-fetch.js
new file mode 100644
index 0000000000..2535d15bc3
--- /dev/null
+++ b/web3.js/flow-typed/node-fetch.js
@@ -0,0 +1,27 @@
+declare module 'node-fetch' {
+  declare export type Config = {
+    method?: string;
+    headers?: {[key: string]: string};
+    compress?: bool;
+    body?: Buffer|string;
+    size?: number;
+  }
+
+  declare export class Headers {
+    get(name: string): ?string;
+    set(name: string, value: string): void;
+  }
+
+  declare export class Response {
+    url: string;
+    status: string;
+    statusText: string;
+    headers: Headers;
+    ok: bool;
+
+    json(): Promise<Object>;
+    text(): Promise<string>;
+  }
+
+  declare export default (url: string, config?: Config) => Promise<Response>;
+}
diff --git a/web3.js/flow-typed/superstruct.js b/web3.js/flow-typed/superstruct.js
new file mode 100644
index 0000000000..34b10eb508
--- /dev/null
+++ b/web3.js/flow-typed/superstruct.js
@@ -0,0 +1,5 @@
+declare module 'superstruct' {
+  declare module.exports: {
+    struct(schema: any): any;
+  }
+}
diff --git a/web3.js/flow-typed/tweetnacl.js b/web3.js/flow-typed/tweetnacl.js
index a1c215d48f..05a82f5ac9 100644
--- a/web3.js/flow-typed/tweetnacl.js
+++ b/web3.js/flow-typed/tweetnacl.js
@@ -7,6 +7,7 @@ declare module "tweetnacl" {
   declare module.exports: {
     sign: {
       keyPair(): KeyPair;
+      detached(text: Buffer, secretKey: Buffer): Buffer;
     };
   };
 }
diff --git a/web3.js/package-lock.json b/web3.js/package-lock.json
index ec37dd2f6e..fda56a6e24 100644
--- a/web3.js/package-lock.json
+++ b/web3.js/package-lock.json
@@ -197,6 +197,16 @@
       "integrity": "sha512-SJe0g5cZeGNDP5sD8mIX3scb+eq8LQQZ60FXiKZHipYSeEFZ5EKml+NNMiO76F74TY4PoMWlNxF/YRY40FOvZQ==",
       "dev": true
     },
+    "JSONStream": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.4.tgz",
+      "integrity": "sha512-Y7vfi3I5oMOYIr+WxV8NZxDSwcbNgzdKYsTNInmycOq9bUYwGg9ryu57Wg5NLmCjqdFPNUmpMBo3kSJN9tCbXg==",
+      "dev": true,
+      "requires": {
+        "jsonparse": "1.3.1",
+        "through": "2.3.8"
+      }
+    },
     "abab": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/abab/-/abab-1.0.4.tgz",
@@ -256,6 +266,7 @@
       "version": "5.5.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+      "dev": true,
       "requires": {
         "co": "4.6.0",
         "fast-deep-equal": "1.1.0",
@@ -611,7 +622,8 @@
     "argv": {
       "version": "0.0.2",
       "resolved": "https://registry.npmjs.org/argv/-/argv-0.0.2.tgz",
-      "integrity": "sha1-7L0W+JSbFXGDcRsb2jNPN4QBhas="
+      "integrity": "sha1-7L0W+JSbFXGDcRsb2jNPN4QBhas=",
+      "dev": true
     },
     "arr-diff": {
       "version": "2.0.0",
@@ -680,7 +692,8 @@
     "asn1": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz",
-      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y="
+      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y=",
+      "dev": true
     },
     "asn1.js": {
       "version": "4.10.1",
@@ -696,7 +709,8 @@
     "assert-plus": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
+      "dev": true
     },
     "assign-symbols": {
       "version": "1.0.0",
@@ -734,7 +748,8 @@
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
+      "dev": true
     },
     "atob": {
       "version": "2.1.0",
@@ -745,7 +760,8 @@
     "aws-sign2": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
-      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg=",
+      "dev": true
     },
     "aws4": {
       "version": "1.7.0",
@@ -1706,7 +1722,8 @@
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
     },
     "base": {
       "version": "0.11.2",
@@ -1788,6 +1805,7 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
       "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
+      "dev": true,
       "optional": true,
       "requires": {
         "tweetnacl": "0.14.5"
@@ -1797,6 +1815,7 @@
           "version": "0.14.5",
           "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
           "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
+          "dev": true,
           "optional": true
         }
       }
@@ -1893,6 +1912,7 @@
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
       "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
       "requires": {
         "balanced-match": "1.0.0",
         "concat-map": "0.0.1"
@@ -2155,7 +2175,8 @@
     "caseless": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
-      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=",
+      "dev": true
     },
     "center-align": {
       "version": "0.1.3",
@@ -2309,10 +2330,40 @@
       "integrity": "sha1-YT+2hjmyaklKxTJT4Vsaa9iK2oU=",
       "dev": true
     },
+    "clone-deep": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/clone-deep/-/clone-deep-2.0.2.tgz",
+      "integrity": "sha512-SZegPTKjCgpQH63E+eN6mVEEPdQBOUzjyJm5Pora4lrwWRFS8I0QAxV/KD6vV/i0WuijHZWQC1fMsPEdxfdVCQ==",
+      "dev": true,
+      "requires": {
+        "for-own": "1.0.0",
+        "is-plain-object": "2.0.4",
+        "kind-of": "6.0.2",
+        "shallow-clone": "1.0.0"
+      },
+      "dependencies": {
+        "for-own": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/for-own/-/for-own-1.0.0.tgz",
+          "integrity": "sha1-xjMy9BXO3EsE2/5wz4NklMU8tEs=",
+          "dev": true,
+          "requires": {
+            "for-in": "1.0.2"
+          }
+        },
+        "kind-of": {
+          "version": "6.0.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
+          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+          "dev": true
+        }
+      }
+    },
     "co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
-      "integrity": "sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ="
+      "integrity": "sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ=",
+      "dev": true
     },
     "code-point-at": {
       "version": "1.1.0",
@@ -2324,6 +2375,7 @@
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/codecov/-/codecov-3.0.4.tgz",
       "integrity": "sha512-KJyzHdg9B8U9LxXa7hS6jnEW5b1cNckLYc2YpnJ1nEFiOW+/iSzDHp+5MYEIQd9fN3/tC6WmGZmYiwxzkuGp/A==",
+      "dev": true,
       "requires": {
         "argv": "0.0.2",
         "ignore-walk": "3.0.1",
@@ -2334,17 +2386,20 @@
         "aws4": {
           "version": "1.8.0",
           "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
-          "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
+          "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
+          "dev": true
         },
         "extend": {
           "version": "3.0.2",
           "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
-          "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g=="
+          "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
+          "dev": true
         },
         "har-validator": {
           "version": "5.1.0",
           "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.1.0.tgz",
           "integrity": "sha512-+qnmNjI4OfH2ipQ9VQOw23bBd/ibtfbVdK2fYbY4acTDqKTW/YDp9McimZdDbG8iV9fZizUqQMD5xvriB146TA==",
+          "dev": true,
           "requires": {
             "ajv": "5.5.2",
             "har-schema": "2.0.0"
@@ -2353,12 +2408,14 @@
         "mime-db": {
           "version": "1.35.0",
           "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.35.0.tgz",
-          "integrity": "sha512-JWT/IcCTsB0Io3AhWUMjRqucrHSPsSf2xKLaRldJVULioggvkJvggZ3VXNNSRkCddE6D+BUI4HEIZIA2OjwIvg=="
+          "integrity": "sha512-JWT/IcCTsB0Io3AhWUMjRqucrHSPsSf2xKLaRldJVULioggvkJvggZ3VXNNSRkCddE6D+BUI4HEIZIA2OjwIvg==",
+          "dev": true
         },
         "mime-types": {
           "version": "2.1.19",
           "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.19.tgz",
           "integrity": "sha512-P1tKYHVSZ6uFo26mtnve4HQFE3koh1UWVkp8YUC+ESBHe945xWSoXuHHiGarDqcEZ+whpCDnlNw5LON0kLo+sw==",
+          "dev": true,
           "requires": {
             "mime-db": "1.35.0"
           }
@@ -2366,17 +2423,20 @@
         "oauth-sign": {
           "version": "0.9.0",
           "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
-          "integrity": "sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ=="
+          "integrity": "sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ==",
+          "dev": true
         },
         "qs": {
           "version": "6.5.2",
           "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
-          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
+          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
+          "dev": true
         },
         "request": {
           "version": "2.88.0",
           "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
           "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
+          "dev": true,
           "requires": {
             "aws-sign2": "0.7.0",
             "aws4": "1.8.0",
@@ -2403,12 +2463,14 @@
         "safe-buffer": {
           "version": "5.1.2",
           "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+          "dev": true
         },
         "tough-cookie": {
           "version": "2.4.3",
           "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
           "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
+          "dev": true,
           "requires": {
             "psl": "1.1.29",
             "punycode": "1.4.1"
@@ -2417,7 +2479,8 @@
         "uuid": {
           "version": "3.3.2",
           "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-          "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
+          "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+          "dev": true
         }
       }
     },
@@ -2462,6 +2525,7 @@
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
       "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
+      "dev": true,
       "requires": {
         "delayed-stream": "1.0.0"
       }
@@ -2487,7 +2551,8 @@
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "dev": true
     },
     "concat-stream": {
       "version": "1.6.2",
@@ -2528,28 +2593,8 @@
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
-    },
-    "coveralls": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.0.tgz",
-      "integrity": "sha512-ZppXR9y5PraUOrf/DzHJY6gzNUhXYE3b9D43xEXs4QYZ7/Oe0Gy0CS+IPKWFfvQFXB3RG9QduaQUFehzSpGAFw==",
-      "dev": true,
-      "requires": {
-        "js-yaml": "3.11.0",
-        "lcov-parse": "0.0.10",
-        "log-driver": "1.2.7",
-        "minimist": "1.2.0",
-        "request": "2.85.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
-          "dev": true
-        }
-      }
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+      "dev": true
     },
     "create-ecdh": {
       "version": "4.0.3",
@@ -2697,6 +2742,7 @@
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
       "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
+      "dev": true,
       "requires": {
         "assert-plus": "1.0.0"
       }
@@ -2875,7 +2921,8 @@
     "delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
-      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
+      "dev": true
     },
     "des.js": {
       "version": "1.0.0",
@@ -3005,6 +3052,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
       "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
+      "dev": true,
       "optional": true,
       "requires": {
         "jsbn": "0.1.1"
@@ -3109,6 +3157,21 @@
         "is-symbol": "1.0.1"
       }
     },
+    "es6-promise": {
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.4.tgz",
+      "integrity": "sha512-/NdNZVJg+uZgtm9eS3O6lrOLYmQag2DjdEXuPaHlZ6RuVqgqaVZfgYCepEIKsLqwdQArOPtC3XzRLqGGfT8KQQ==",
+      "dev": true
+    },
+    "es6-promisify": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/es6-promisify/-/es6-promisify-5.0.0.tgz",
+      "integrity": "sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=",
+      "dev": true,
+      "requires": {
+        "es6-promise": "4.2.4"
+      }
+    },
     "escape-html": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
@@ -3621,6 +3684,12 @@
         }
       }
     },
+    "eslint-plugin-jest": {
+      "version": "21.21.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-21.21.0.tgz",
+      "integrity": "sha512-qoYGTPYuV8bvFYkWj19y4VTq5f2QiNky1Z97rx8RRcPhyJOYbaOs+vjdA/B2FkwWKB46NgzB1rzreDrvEXFh5Q==",
+      "dev": true
+    },
     "eslint-plugin-jsx-a11y": {
       "version": "6.1.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-jsx-a11y/-/eslint-plugin-jsx-a11y-6.1.1.tgz",
@@ -3892,17 +3961,26 @@
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       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
-      "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU="
+      "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
+      "dev": true
+    },
+    "eyes": {
+      "version": "0.1.8",
+      "resolved": "https://registry.npmjs.org/eyes/-/eyes-0.1.8.tgz",
+      "integrity": "sha1-Ys8SAjTGg3hdkCNIqADvPgzCC8A=",
+      "dev": true
     },
     "fast-deep-equal": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz",
-      "integrity": "sha1-wFNHeBfIa1HaqFPIHgWbcz0CNhQ="
+      "integrity": "sha1-wFNHeBfIa1HaqFPIHgWbcz0CNhQ=",
+      "dev": true
     },
     "fast-json-stable-stringify": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
-      "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I="
+      "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I=",
+      "dev": true
     },
     "fast-levenshtein": {
       "version": "2.0.6",
@@ -4222,12 +4300,14 @@
     "forever-agent": {
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       "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
-      "integrity": "sha1-+8cfDEGt6zf5bFd60e1C2P2sypE="
+      "integrity": "sha1-+8cfDEGt6zf5bFd60e1C2P2sypE=",
+      "dev": true
     },
     "form-data": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.2.tgz",
       "integrity": "sha1-SXBJi+YEwgwAXU9cI67NIda0kJk=",
+      "dev": true,
       "requires": {
         "asynckit": "0.4.0",
         "combined-stream": "1.0.6",
@@ -4908,6 +4988,7 @@
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       "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.7.tgz",
       "integrity": "sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=",
+      "dev": true,
       "requires": {
         "assert-plus": "1.0.0"
       }
@@ -5048,7 +5129,8 @@
     "har-schema": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
-      "integrity": "sha1-qUwiJOvKwEeCoNkDVSHyRzW37JI="
+      "integrity": "sha1-qUwiJOvKwEeCoNkDVSHyRzW37JI=",
+      "dev": true
     },
     "har-validator": {
       "version": "5.0.3",
@@ -5257,6 +5339,7 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.2.0.tgz",
       "integrity": "sha1-muzZJRFHcvPZW2WmCruPfBj7rOE=",
+      "dev": true,
       "requires": {
         "assert-plus": "1.0.0",
         "jsprim": "1.4.1",
@@ -5435,6 +5518,7 @@
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/ignore-walk/-/ignore-walk-3.0.1.tgz",
       "integrity": "sha512-DTVlMx3IYPe0/JJcYP7Gxg7ttZZu3IInhuEhbchuqneY9wWe5Ojy2mXLBaQFUQmo0AW2r3qG7m1mg86js+gnlQ==",
+      "dev": true,
       "requires": {
         "minimatch": "3.0.4"
       }
@@ -5865,7 +5949,8 @@
     "is-typedarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
-      "integrity": "sha1-5HnICFjfDBsR3dppQPlgEfzaSpo="
+      "integrity": "sha1-5HnICFjfDBsR3dppQPlgEfzaSpo=",
+      "dev": true
     },
     "is-utf8": {
       "version": "0.2.1",
@@ -5909,7 +5994,8 @@
     "isstream": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz",
-      "integrity": "sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo="
+      "integrity": "sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=",
+      "dev": true
     },
     "istanbul-api": {
       "version": "1.3.1",
@@ -6057,6 +6143,21 @@
         "is-object": "1.0.1"
       }
     },
+    "jayson": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/jayson/-/jayson-2.0.6.tgz",
+      "integrity": "sha512-ZIzF3DZ3ig9rNeOLUzGUbpxjOMqrfUX9a2H+3cmQHIGdBk8nZMEmHVZNXwxNYchgx6UnB/CFV+miFEfOjmMBmA==",
+      "dev": true,
+      "requires": {
+        "JSONStream": "1.3.4",
+        "commander": "2.15.1",
+        "es6-promisify": "5.0.0",
+        "eyes": "0.1.8",
+        "json-stringify-safe": "5.0.1",
+        "lodash": "4.17.5",
+        "uuid": "3.2.1"
+      }
+    },
     "jest": {
       "version": "22.4.3",
       "resolved": "https://registry.npmjs.org/jest/-/jest-22.4.3.tgz",
@@ -6790,6 +6891,7 @@
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       "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
       "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM=",
+      "dev": true,
       "optional": true
     },
     "jsdom": {
@@ -6843,12 +6945,14 @@
     "json-schema": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.3.tgz",
-      "integrity": "sha1-tIDIkuWaLwWVTOcnvT8qTogvnhM="
+      "integrity": "sha1-tIDIkuWaLwWVTOcnvT8qTogvnhM=",
+      "dev": true
     },
     "json-schema-traverse": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz",
-      "integrity": "sha1-NJptRMU6Ud6JtAgFxdXlm0F9M0A="
+      "integrity": "sha1-NJptRMU6Ud6JtAgFxdXlm0F9M0A=",
+      "dev": true
     },
     "json-stable-stringify": {
       "version": "1.0.1",
@@ -6868,7 +6972,8 @@
     "json-stringify-safe": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
-      "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus="
+      "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus=",
+      "dev": true
     },
     "json5": {
       "version": "0.5.1",
@@ -6891,10 +6996,17 @@
       "integrity": "sha1-LHS27kHZPKUbe1qu6PUDYx0lKnM=",
       "dev": true
     },
+    "jsonparse": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/jsonparse/-/jsonparse-1.3.1.tgz",
+      "integrity": "sha1-P02uSpH6wxX3EGL4UhzCOfE2YoA=",
+      "dev": true
+    },
     "jsprim": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.1.tgz",
       "integrity": "sha1-MT5mvB5cwG5Di8G3SZwuXFastqI=",
+      "dev": true,
       "requires": {
         "assert-plus": "1.0.0",
         "extsprintf": "1.3.0",
@@ -6945,12 +7057,6 @@
         "invert-kv": "1.0.0"
       }
     },
-    "lcov-parse": {
-      "version": "0.0.10",
-      "resolved": "https://registry.npmjs.org/lcov-parse/-/lcov-parse-0.0.10.tgz",
-      "integrity": "sha1-GwuP+ayceIklBYK3C3ExXZ2m2aM=",
-      "dev": true
-    },
     "left-pad": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/left-pad/-/left-pad-1.3.0.tgz",
@@ -7323,12 +7429,6 @@
       "integrity": "sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=",
       "dev": true
     },
-    "log-driver": {
-      "version": "1.2.7",
-      "resolved": "https://registry.npmjs.org/log-driver/-/log-driver-1.2.7.tgz",
-      "integrity": "sha512-U7KCmLdqsGHBLeWqYlFA0V0Sl6P08EE1ZrmA9cxjUE0WVqT9qnyVDPz1kzpFEP0jdJuFnasWIfSd7fsaNXkpbg==",
-      "dev": true
-    },
     "longest": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
@@ -7490,12 +7590,14 @@
     "mime-db": {
       "version": "1.33.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.33.0.tgz",
-      "integrity": "sha512-BHJ/EKruNIqJf/QahvxwQZXKygOQ256myeN/Ew+THcAa5q+PjyTTMMeNQC4DZw5AwfvelsUrA6B67NKMqXDbzQ=="
+      "integrity": "sha512-BHJ/EKruNIqJf/QahvxwQZXKygOQ256myeN/Ew+THcAa5q+PjyTTMMeNQC4DZw5AwfvelsUrA6B67NKMqXDbzQ==",
+      "dev": true
     },
     "mime-types": {
       "version": "2.1.18",
       "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.18.tgz",
       "integrity": "sha512-lc/aahn+t4/SWV/qcmumYjymLsWfN3ELhpmVuUFjgsORruuZPVSwAQryq+HHGvO/SI2KVX26bx+En+zhM8g8hQ==",
+      "dev": true,
       "requires": {
         "mime-db": "1.33.0"
       }
@@ -7528,6 +7630,7 @@
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
       "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "dev": true,
       "requires": {
         "brace-expansion": "1.1.11"
       }
@@ -7559,6 +7662,24 @@
         }
       }
     },
+    "mixin-object": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/mixin-object/-/mixin-object-2.0.1.tgz",
+      "integrity": "sha1-T7lJRB2rGCVA8f4DW6YOGUel5X4=",
+      "dev": true,
+      "requires": {
+        "for-in": "0.1.8",
+        "is-extendable": "0.1.1"
+      },
+      "dependencies": {
+        "for-in": {
+          "version": "0.1.8",
+          "resolved": "https://registry.npmjs.org/for-in/-/for-in-0.1.8.tgz",
+          "integrity": "sha1-2Hc5COMSVhCZUrH9ubP6hn0ndeE=",
+          "dev": true
+        }
+      }
+    },
     "mkdirp": {
       "version": "0.5.1",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
@@ -8114,7 +8235,8 @@
     "performance-now": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
-      "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns="
+      "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=",
+      "dev": true
     },
     "pify": {
       "version": "2.3.0",
@@ -8267,7 +8389,8 @@
     "psl": {
       "version": "1.1.29",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.29.tgz",
-      "integrity": "sha512-AeUmQ0oLN02flVHXWh9sSJF7mcdFq0ppid/JkErufc3hGIV/AMa8Fo9VgDo/cT2jFdOWoFvHp90qqBH54W+gjQ=="
+      "integrity": "sha512-AeUmQ0oLN02flVHXWh9sSJF7mcdFq0ppid/JkErufc3hGIV/AMa8Fo9VgDo/cT2jFdOWoFvHp90qqBH54W+gjQ==",
+      "dev": true
     },
     "public-encrypt": {
       "version": "4.0.2",
@@ -8285,7 +8408,8 @@
     "punycode": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
-      "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4="
+      "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4=",
+      "dev": true
     },
     "qs": {
       "version": "6.5.1",
@@ -8965,7 +9089,8 @@
     "safe-buffer": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.1.tgz",
-      "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
+      "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg==",
+      "dev": true
     },
     "safe-regex": {
       "version": "1.1.0",
@@ -9367,6 +9492,25 @@
         "safe-buffer": "5.1.1"
       }
     },
+    "shallow-clone": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/shallow-clone/-/shallow-clone-1.0.0.tgz",
+      "integrity": "sha512-oeXreoKR/SyNJtRJMAKPDSvd28OqEwG4eR/xc856cRGBII7gX9lvAqDxusPm0846z/w/hWYjI1NpKwJ00NHzRA==",
+      "dev": true,
+      "requires": {
+        "is-extendable": "0.1.1",
+        "kind-of": "5.1.0",
+        "mixin-object": "2.0.1"
+      },
+      "dependencies": {
+        "kind-of": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-5.1.0.tgz",
+          "integrity": "sha512-NGEErnH6F2vUuXDh+OlbcKW7/wOcfdRHaZ7VWtqCztfHri/++YKmP51OdWeGPuqCOba6kk2OTe5d02VmTB80Pw==",
+          "dev": true
+        }
+      }
+    },
     "shebang-command": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
@@ -9617,6 +9761,7 @@
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.14.1.tgz",
       "integrity": "sha1-Ew9Zde3a2WPx1W+SuaxsUfqfg+s=",
+      "dev": true,
       "requires": {
         "asn1": "0.2.3",
         "assert-plus": "1.0.0",
@@ -9632,6 +9777,7 @@
           "version": "0.14.5",
           "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
           "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
+          "dev": true,
           "optional": true
         }
       }
@@ -9771,6 +9917,24 @@
       "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo=",
       "dev": true
     },
+    "superstruct": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/superstruct/-/superstruct-0.5.4.tgz",
+      "integrity": "sha512-DqMhz5fMxOaj0JtUy9b6oBgCen4frmMKAYCb4TMUocLWP0wvvtrzEk9h9/K0hQ5Vbuvk+Gu4YGRN3v/9HjfY3w==",
+      "dev": true,
+      "requires": {
+        "clone-deep": "2.0.2",
+        "kind-of": "6.0.2"
+      },
+      "dependencies": {
+        "kind-of": {
+          "version": "6.0.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
+          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+          "dev": true
+        }
+      }
+    },
     "supports-color": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -10331,6 +10495,7 @@
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
       "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
+      "dev": true,
       "requires": {
         "safe-buffer": "5.1.1"
       }
@@ -10583,7 +10748,8 @@
     "urlgrey": {
       "version": "0.4.4",
       "resolved": "https://registry.npmjs.org/urlgrey/-/urlgrey-0.4.4.tgz",
-      "integrity": "sha1-iS/pWWCAXoVRnxzUOJ8stMu3ZS8="
+      "integrity": "sha1-iS/pWWCAXoVRnxzUOJ8stMu3ZS8=",
+      "dev": true
     },
     "use": {
       "version": "3.1.0",
@@ -10638,6 +10804,7 @@
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "dev": true,
       "requires": {
         "assert-plus": "1.0.0",
         "core-util-is": "1.0.2",
diff --git a/web3.js/package.json b/web3.js/package.json
index 556e38666f..0f5c260411 100644
--- a/web3.js/package.json
+++ b/web3.js/package.json
@@ -49,8 +49,8 @@
     "babel-preset-stage-0": "6.24.1",
     "babel-runtime": "^6.26.0",
     "bs58": "^4.0.1",
-    "cross-env": "5.1.4",
     "codecov": "^3.0.4",
+    "cross-env": "5.1.4",
     "enzyme": "3.3.0",
     "esdoc": "^1.1.0",
     "esdoc-ecmascript-proposal-plugin": "^1.0.0",
@@ -65,7 +65,10 @@
     "flow-bin": "0.70.0",
     "flow-typed": "2.4.0",
     "fs-file-tree": "1.0.6",
+    "jayson": "^2.0.6",
     "jest": "22.4.3",
+    "joi": "^13.6.0",
+    "node-fetch": "^2.2.0",
     "rimraf": "2.6.2",
     "rollup": "0.58.1",
     "rollup-plugin-babel": "3.0.3",
@@ -76,6 +79,7 @@
     "rollup-plugin-node-resolve": "3.3.0",
     "rollup-plugin-replace": "2.0.0",
     "rollup-plugin-uglify": "3.0.0",
+    "superstruct": "^0.5.4",
     "tweetnacl": "^1.0.0",
     "watch": "^1.0.2"
   }
diff --git a/web3.js/rollup.config.js b/web3.js/rollup.config.js
index c976bb4c19..b6c8ea838d 100644
--- a/web3.js/rollup.config.js
+++ b/web3.js/rollup.config.js
@@ -14,6 +14,7 @@ function generateConfig(configType) {
     input: 'src/index.js',
     plugins: [
       nodeResolve(),
+      json(),
       babel({
         exclude: '**/node_modules/**',
         runtimeHelpers: true,
@@ -47,7 +48,6 @@ function generateConfig(configType) {
         name: 'solanaWeb3',
       },
     ];
-    config.plugins.unshift(json());
     config.plugins.push(builtins());
     config.plugins.push(globals());
     break;
diff --git a/web3.js/src/account.js b/web3.js/src/account.js
index 6a887760dd..7f8f5069ad 100644
--- a/web3.js/src/account.js
+++ b/web3.js/src/account.js
@@ -3,6 +3,11 @@ import nacl from 'tweetnacl';
 import bs58 from 'bs58';
 import type {KeyPair} from 'tweetnacl';
 
+/**
+ * @typedef {string} PublicKey
+ */
+export type PublicKey = string;
+
 export class Account {
   _keypair: KeyPair;
 
@@ -14,7 +19,7 @@ export class Account {
     }
   }
 
-  get publicKey(): string {
+  get publicKey(): PublicKey {
     return bs58.encode(this._keypair.publicKey);
   }
 
diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
new file mode 100644
index 0000000000..756c40545f
--- /dev/null
+++ b/web3.js/src/connection.js
@@ -0,0 +1,178 @@
+// @flow
+
+import assert from 'assert';
+import fetch from 'node-fetch';
+import jayson from 'jayson/lib/client/browser';
+import nacl from 'tweetnacl';
+import {struct} from 'superstruct';
+
+import type {Account, PublicKey} from './account';
+
+/**
+ * @typedef {string} TransactionSignature
+ */
+export type TransactionSignature = string;
+
+/**
+ * @typedef {string} TransactionId
+ */
+export type TransactionId= string;
+
+type RpcRequest = (methodName: string, args: Array<string>) => any;
+
+function createRpcRequest(url): RpcRequest {
+  const server = jayson(
+    async (request, callback) => {
+      const options = {
+        method: 'POST',
+        body: request,
+        headers: {
+          'Content-Type': 'application/json',
+        }
+      };
+
+      try {
+        const res = await fetch(url, options);
+        const text = await res.text();
+        callback(null, text);
+      } catch (err) {
+        callback(err);
+      }
+    }
+  );
+
+  return (method, args) => {
+    return new Promise((resolve, reject) => {
+      server.request(method, args, (err, response) => {
+        if (err) {
+          reject(err);
+          return;
+        }
+        resolve(response);
+      });
+    });
+  };
+}
+
+const GetBalanceRpcResult = struct({
+  jsonrpc: struct.literal('2.0'),
+  id: 'string',
+  error: 'any?',
+  result: 'number?',
+});
+
+const ConfirmTransactionRpcResult = struct({
+  jsonrpc: struct.literal('2.0'),
+  id: 'string',
+  error: 'any?',
+  result: 'boolean?',
+});
+
+const GetTransactionCountRpcResult = struct({
+  jsonrpc: struct.literal('2.0'),
+  id: 'string',
+  error: 'any?',
+  result: 'number?',
+});
+
+const GetLastId = struct({
+  jsonrpc: struct.literal('2.0'),
+  id: 'string',
+  error: 'any?',
+  result: 'string?',
+});
+
+const GetFinalityRpcResult = struct({
+  jsonrpc: struct.literal('2.0'),
+  id: 'string',
+  error: 'any?',
+  result: 'number?',
+});
+
+function sleep(duration = 0) {
+  return new Promise((accept) => {
+    setTimeout(accept, duration);
+  });
+}
+
+export class Connection {
+  _rpcRequest: RpcRequest;
+
+  constructor(endpoint: string) {
+    this._rpcRequest = createRpcRequest(endpoint);
+  }
+
+  async getBalance(publicKey: string): Promise<number> {
+    const unsafeRes = await this._rpcRequest(
+      'getBalance',
+      [publicKey]
+    );
+    const res = GetBalanceRpcResult(unsafeRes);
+    if (res.error) {
+      throw new Error(res.error.message);
+    }
+    assert(typeof res.result !== 'undefined');
+    return res.result;
+  }
+
+  async confirmTransaction(signature: TransactionSignature): Promise<boolean> {
+    const unsafeRes = await this._rpcRequest(
+      'confirmTransaction',
+      [signature]
+    );
+    const res = ConfirmTransactionRpcResult(unsafeRes);
+    if (res.error) {
+      throw new Error(res.error.message);
+    }
+    assert(typeof res.result !== 'undefined');
+    return res.result;
+  }
+
+  async getTransactionCount(): Promise<number> {
+    const unsafeRes = await this._rpcRequest('getTransactionCount', []);
+    const res = GetTransactionCountRpcResult(unsafeRes);
+    if (res.error) {
+      throw new Error(res.error.message);
+    }
+    assert(typeof res.result !== 'undefined');
+    return Number(res.result);
+  }
+
+  async getLastId(): Promise<TransactionId> {
+    const unsafeRes = await this._rpcRequest('getLastId', []);
+    const res = GetLastId(unsafeRes);
+    if (res.error) {
+      throw new Error(res.error.message);
+    }
+    assert(typeof res.result !== 'undefined');
+    return res.result;
+  }
+
+  async getFinality(): Promise<number> {
+    const unsafeRes = await this._rpcRequest('getFinality', []);
+    const res = GetFinalityRpcResult(unsafeRes);
+    if (res.error) {
+      throw new Error(res.error.message);
+    }
+    assert(typeof res.result !== 'undefined');
+    return Number(res.result);
+  }
+
+  async requestAirdrop(account: Account, amount: number): Promise<void> {
+    console.log(`TODO: airdrop ${amount} to ${account.publicKey}`);
+    await sleep(500); // TODO
+  }
+
+  async sendTokens(from: Account, to: PublicKey, amount: number): Promise<TransactionSignature> {
+    const transaction = Buffer.from(
+      // TODO: This is not the correct transaction payload
+      `Transaction ${from.publicKey} ${to} ${amount}`
+    );
+    const signature = nacl.sign.detached(transaction, from.secretKey);
+
+    console.log('Created signature of length', signature.length);
+    await sleep(500); // TODO: transmit transaction + signature
+    throw new Error(`Unable to send ${amount} tokens to ${to}`);
+  }
+}
+
diff --git a/web3.js/src/index.js b/web3.js/src/index.js
index e1e0a6b312..bf9db6748c 100644
--- a/web3.js/src/index.js
+++ b/web3.js/src/index.js
@@ -1 +1,2 @@
 export {Account} from './account';
+export {Connection} from './connection';
diff --git a/web3.js/test/connection.test.js b/web3.js/test/connection.test.js
new file mode 100644
index 0000000000..0331f7879e
--- /dev/null
+++ b/web3.js/test/connection.test.js
@@ -0,0 +1,45 @@
+// @flow
+import {Connection} from '../src/connection';
+import {Account} from '../src/account';
+
+
+const url = 'http://localhost:8899';
+//const url = 'http://master.testnet.solana.com:8899';
+
+test.skip('get balance', async () => {
+  const account = new Account();
+  const connection = new Connection(url);
+
+  const balance = await connection.getBalance(account.publicKey);
+  expect(balance).toBeGreaterThanOrEqual(0);
+});
+
+test.skip('throws on bad transaction', () => {
+  const connection = new Connection(url);
+
+  expect(connection.confirmTransaction('bad transaction signature'))
+  .rejects.toThrow('Invalid request');
+});
+
+test.skip('get transaction count', async () => {
+  const connection = new Connection(url);
+
+  const count = await connection.getTransactionCount();
+  expect(count).toBeGreaterThanOrEqual(0);
+});
+
+test.skip('get last Id', async () => {
+  const connection = new Connection(url);
+
+  const lastId = await connection.getLastId();
+  expect(lastId.length).toBeGreaterThanOrEqual(43);
+});
+
+test.skip('get finality', async () => {
+  const connection = new Connection(url);
+
+  const finality = await connection.getFinality();
+  expect(finality).toBeGreaterThanOrEqual(0);
+});
+
+