Added deployed to contract and abstracted polling into web.

contracts/contract.js

@@ -15,6 +15,7 @@ var address_1 = require("../utils/address");
 var bytes_1 = require("../utils/bytes");
 var bignumber_1 = require("../utils/bignumber");
 var properties_1 = require("../utils/properties");
+var web_1 = require("../utils/web");
 var errors = __importStar(require("../utils/errors"));
 var allowedTransactionKeys = {
     data: true, from: true, gasLimit: true, gasPrice: true, nonce: true, to: true, value: true
@@ -270,6 +271,25 @@ var Contract = /** @class */ (function () {
         enumerable: true,
         configurable: true
     });
+    // @TODO: Allow timeout?
+    Contract.prototype.deployed = function () {
+        var _this = this;
+        // If we were just deployed, we know the transaction we should occur in
+        if (this.deployTransaction) {
+            return this.deployTransaction.wait().then(function () {
+                return _this;
+            });
+        }
+        // Otherwise, poll for our code to be deployed
+        return web_1.poll(function () {
+            return _this.provider.getCode(_this.address).then(function (code) {
+                if (code === '0x') {
+                    return undefined;
+                }
+                return _this;
+            });
+        });
+    };
     // @TODO:
     // estimateFallback(overrides?: TransactionRequest): Promise<BigNumber>
     // @TODO:

dist/ethers.d.ts

@@ -226,6 +226,7 @@ declare module 'ethers/contracts/contract' {
         readonly deployTransaction: TransactionResponse;
         constructor(addressOrName: string, contractInterface: Contractish, signerOrProvider: Signer | Provider);
         onerror: ErrorCallback;
+        deployed(): Promise<any>;
         fallback(overrides?: TransactionRequest): Promise<TransactionResponse>;
         connect(signerOrProvider: Signer | Provider): Contract;
         attach(addressOrName: string): Contract;
@@ -712,6 +713,13 @@ declare module 'ethers/utils/web' {
     };
     export type ProcessFunc = (value: any) => any;
     export function fetchJson(connection: string | ConnectionInfo, json: string, processFunc: ProcessFunc): Promise<any>;
+    export type PollOptions = {
+        timeout?: number;
+        floor?: number;
+        ceiling?: number;
+        interval?: number;
+    };
+    export function poll(func: () => Promise<any>, options?: PollOptions): Promise<any>;
 }
 
 declare module 'ethers/utils/transaction' {

dist/ethers.js

@@ -8867,6 +8867,7 @@ var address_1 = require("../utils/address");
 var bytes_1 = require("../utils/bytes");
 var bignumber_1 = require("../utils/bignumber");
 var properties_1 = require("../utils/properties");
+var web_1 = require("../utils/web");
 var errors = __importStar(require("../utils/errors"));
 var allowedTransactionKeys = {
     data: true, from: true, gasLimit: true, gasPrice: true, nonce: true, to: true, value: true
@@ -9122,6 +9123,25 @@ var Contract = /** @class */ (function () {
         enumerable: true,
         configurable: true
     });
+    // @TODO: Allow timeout?
+    Contract.prototype.deployed = function () {
+        var _this = this;
+        // If we were just deployed, we know the transaction we should occur in
+        if (this.deployTransaction) {
+            return this.deployTransaction.wait().then(function () {
+                return _this;
+            });
+        }
+        // Otherwise, poll for our code to be deployed
+        return web_1.poll(function () {
+            return _this.provider.getCode(_this.address).then(function (code) {
+                if (code === '0x') {
+                    return undefined;
+                }
+                return _this;
+            });
+        });
+    };
     // @TODO:
     // estimateFallback(overrides?: TransactionRequest): Promise<BigNumber>
     // @TODO:
@@ -9198,7 +9218,7 @@ var Contract = /** @class */ (function () {
 }());
 exports.Contract = Contract;
 
-},{"../providers/provider":56,"../utils/abi-coder":58,"../utils/address":59,"../utils/bignumber":60,"../utils/bytes":61,"../utils/errors":62,"../utils/properties":66,"../wallet/wallet":79,"./interface":49}],48:[function(require,module,exports){
+},{"../providers/provider":56,"../utils/abi-coder":58,"../utils/address":59,"../utils/bignumber":60,"../utils/bytes":61,"../utils/errors":62,"../utils/properties":66,"../utils/web":74,"../wallet/wallet":79,"./interface":49}],48:[function(require,module,exports){
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
 var contract_1 = require("./contract");
@@ -10507,6 +10527,7 @@ var hash_1 = require("../utils/hash");
 var networks_1 = require("./networks");
 var properties_1 = require("../utils/properties");
 var transaction_1 = require("../utils/transaction");
+var web_1 = require("../utils/web");
 var errors = __importStar(require("../utils/errors"));
 ;
 ;
@@ -10851,31 +10872,6 @@ var formatLog = {
 function checkLog(log) {
     return check(formatLog, log);
 }
-function stallPromise(allowNullFunc, executeFunc) {
-    return new Promise(function (resolve, reject) {
-        var attempt = 0;
-        function check() {
-            executeFunc().then(function (result) {
-                // If we have a result, or are allowed null then we're done
-                if (result || allowNullFunc()) {
-                    resolve(result);
-                    // Otherwise, exponential back-off (up to 10s) our next request
-                }
-                else {
-                    attempt++;
-                    var timeout = 500 + 250 * parseInt(String(Math.random() * (1 << attempt)));
-                    if (timeout > 10000) {
-                        timeout = 10000;
-                    }
-                    setTimeout(check, timeout);
-                }
-            }, function (error) {
-                reject(error);
-            });
-        }
-        check();
-    });
-}
 //////////////////////////////
 // Event Serializeing
 function recurse(object, convertFunc) {
@@ -11346,12 +11342,13 @@ var Provider = /** @class */ (function () {
                 try {
                     var blockHash = bytes_1.hexlify(blockHashOrBlockTag);
                     if (bytes_1.hexDataLength(blockHash) === 32) {
-                        return stallPromise(function () {
-                            return (_this._emitted['b:' + blockHash.toLowerCase()] == null);
-                        }, function () {
+                        return web_1.poll(function () {
                             return _this.perform('getBlock', { blockHash: blockHash }).then(function (block) {
                                 if (block == null) {
-                                    return null;
+                                    if (_this._emitted['b:' + blockHash.toLowerCase()] == null) {
+                                        return null;
+                                    }
+                                    return undefined;
                                 }
                                 return checkBlock(block);
                             });
@@ -11360,16 +11357,17 @@ var Provider = /** @class */ (function () {
                 }
                 catch (error) { }
                 try {
-                    var blockTag = checkBlockTag(blockHashOrBlockTag);
-                    return stallPromise(function () {
-                        if (bytes_1.isHexString(blockTag)) {
-                            var blockNumber = parseInt(blockTag.substring(2), 16);
-                            return blockNumber > _this._emitted.block;
-                        }
-                        return true;
-                    }, function () {
-                        return _this.perform('getBlock', { blockTag: blockTag }).then(function (block) {
+                    var blockNumber_1 = -128;
+                    var blockTag_1 = checkBlockTag(blockHashOrBlockTag);
+                    if (bytes_1.isHexString(blockTag_1)) {
+                        blockNumber_1 = parseInt(blockTag_1.substring(2), 16);
+                    }
+                    return web_1.poll(function () {
+                        return _this.perform('getBlock', { blockTag: blockTag_1 }).then(function (block) {
                             if (block == null) {
+                                if (blockNumber_1 > _this._emitted.block) {
+                                    return undefined;
+                                }
                                 return null;
                             }
                             return checkBlock(block);
@@ -11387,14 +11385,15 @@ var Provider = /** @class */ (function () {
             return properties_1.resolveProperties({ transactionHash: transactionHash }).then(function (_a) {
                 var transactionHash = _a.transactionHash;
                 var params = { transactionHash: checkHash(transactionHash) };
-                return stallPromise(function () {
-                    return (_this._emitted['t:' + transactionHash.toLowerCase()] == null);
-                }, function () {
+                return web_1.poll(function () {
                     return _this.perform('getTransaction', params).then(function (result) {
-                        if (result != null) {
-                            result = checkTransactionResponse(result);
+                        if (result == null) {
+                            if (_this._emitted['t:' + transactionHash.toLowerCase()] == null) {
+                                return null;
+                            }
+                            return undefined;
                         }
-                        return result;
+                        return checkTransactionResponse(result);
                     });
                 });
             });
@@ -11406,14 +11405,15 @@ var Provider = /** @class */ (function () {
             return properties_1.resolveProperties({ transactionHash: transactionHash }).then(function (_a) {
                 var transactionHash = _a.transactionHash;
                 var params = { transactionHash: checkHash(transactionHash) };
-                return stallPromise(function () {
-                    return (_this._emitted['t:' + transactionHash.toLowerCase()] == null);
-                }, function () {
+                return web_1.poll(function () {
                     return _this.perform('getTransactionReceipt', params).then(function (result) {
-                        if (result != null) {
-                            result = checkTransactionReceipt(result);
+                        if (result == null) {
+                            if (_this._emitted['t:' + transactionHash.toLowerCase()] == null) {
+                                return null;
+                            }
+                            return undefined;
                         }
-                        return result;
+                        return checkTransactionReceipt(result);
                     });
                 });
             });
@@ -11679,7 +11679,7 @@ var Provider = /** @class */ (function () {
 }());
 exports.Provider = Provider;
 
-},{"../utils/address":59,"../utils/bignumber":60,"../utils/bytes":61,"../utils/errors":62,"../utils/hash":63,"../utils/properties":66,"../utils/rlp":67,"../utils/transaction":71,"../utils/utf8":73,"../wallet/wallet":79,"./networks":55}],57:[function(require,module,exports){
+},{"../utils/address":59,"../utils/bignumber":60,"../utils/bytes":61,"../utils/errors":62,"../utils/hash":63,"../utils/properties":66,"../utils/rlp":67,"../utils/transaction":71,"../utils/utf8":73,"../utils/web":74,"../wallet/wallet":79,"./networks":55}],57:[function(require,module,exports){
 'use strict';
 var __extends = (this && this.__extends) || (function () {
     var extendStatics = Object.setPrototypeOf ||
@@ -12041,6 +12041,18 @@ var Coder = /** @class */ (function () {
     }
     return Coder;
 }());
+// Clones the functionality of an existing Coder, but without a localName
+var CoderAnonymous = /** @class */ (function (_super) {
+    __extends(CoderAnonymous, _super);
+    function CoderAnonymous(coder) {
+        var _this = _super.call(this, coder.coerceFunc, coder.name, coder.type, undefined, coder.dynamic) || this;
+        properties_1.defineReadOnly(_this, 'coder', coder);
+        return _this;
+    }
+    CoderAnonymous.prototype.encode = function (value) { return this.coder.encode(value); };
+    CoderAnonymous.prototype.decode = function (data, offset) { return this.coder.decode(data, offset); };
+    return CoderAnonymous;
+}(Coder));
 var CoderNull = /** @class */ (function (_super) {
     __extends(CoderNull, _super);
     function CoderNull(coerceFunc, localName) {
@@ -12465,7 +12477,7 @@ var CoderArray = /** @class */ (function (_super) {
         }
         var coders = [];
         for (var i = 0; i < count; i++) {
-            coders.push(this.coder);
+            coders.push(new CoderAnonymous(this.coder));
         }
         var result = unpack(coders, data, offset);
         result.consumed += consumed;
@@ -14329,6 +14341,71 @@ function fetchJson(connection, json, processFunc) {
     });
 }
 exports.fetchJson = fetchJson;
+function poll(func, options) {
+    if (!options) {
+        options = {};
+    }
+    if (options.floor == null) {
+        options.floor = 0;
+    }
+    if (options.ceiling == null) {
+        options.ceiling = 10000;
+    }
+    if (options.interval == null) {
+        options.interval = 250;
+    }
+    return new Promise(function (resolve, reject) {
+        var timer = null;
+        var done = false;
+        // Returns true if cancel was successful. Unsuccessful cancel means we're already done.
+        var cancel = function () {
+            if (done) {
+                return false;
+            }
+            done = true;
+            if (timer) {
+                clearTimeout(timer);
+            }
+            return true;
+        };
+        if (options.timeout) {
+            timer = setTimeout(function () {
+                if (cancel()) {
+                    reject(new Error('timeout'));
+                }
+            }, options.timeout);
+        }
+        var attempt = 0;
+        function check() {
+            func().then(function (result) {
+                // If we have a result, or are allowed null then we're done
+                if (result !== undefined) {
+                    if (cancel()) {
+                        resolve(result);
+                    }
+                    // Otherwise, exponential back-off (up to 10s) our next request
+                }
+                else if (!done) {
+                    attempt++;
+                    var timeout = options.interval * parseInt(String(Math.random() * Math.pow(2, attempt)));
+                    if (timeout < options.floor) {
+                        timeout = options.floor;
+                    }
+                    if (timeout > options.ceiling) {
+                        timeout = options.ceiling;
+                    }
+                    setTimeout(check, timeout);
+                }
+            }, function (error) {
+                if (cancel()) {
+                    reject(error);
+                }
+            });
+        }
+        check();
+    });
+}
+exports.poll = poll;
 
 },{"./base64":40,"./errors":62,"./utf8":73,"xmlhttprequest":45}],75:[function(require,module,exports){
 'use strict';

package.json

@@ -11,6 +11,7 @@
     "dist-bip39": "gulp bip39-it bip39-ja bip39-ko bip39-zh",
     "dist-types": "gulp temp-types && dts-bundle --name ethers --main .tmp/index.d.ts --out ../dist/ethers.d.ts",
     "dist-version": "node -e \"let v = require('./package.json').version; require('fs').writeFileSync('./src.ts/_version.ts', 'export const version = \\\"' + v +'\\\";\\n')\"",
+    "eslint": "eslint index.js contracts/*.js providers/*.js utils/*.js wallet/*.js wordlists/*.js",
     "test": "if [ \"$RUN_PHANTOMJS\" = \"1\" ]; then npm run-script test-phantomjs; else npm run-script test-node; fi",
     "test-node": "mocha tests/test-*.js",
     "test-phantomjs": "gulp minified tests && phantomjs --web-security=false ./node_modules/mocha-phantomjs-core/mocha-phantomjs-core.js ./tests/test.html",
@@ -32,6 +33,8 @@
     "browserify": "^16.2.2",
     "browserify-zlib": "^0.2.0",
     "dts-bundle": "^0.7.3",
+    "eslint": "^5.0.1",
+    "eslint-plugin-promise": "^3.8.0",
     "ethereumjs-tx": "^1.3.5",
     "ethereumjs-util": "^5.2.0",
     "gulp": "^3.9.1",

providers/provider.js

@@ -28,6 +28,7 @@ var hash_1 = require("../utils/hash");
 var networks_1 = require("./networks");
 var properties_1 = require("../utils/properties");
 var transaction_1 = require("../utils/transaction");
+var web_1 = require("../utils/web");
 var errors = __importStar(require("../utils/errors"));
 ;
 ;
@@ -372,31 +373,6 @@ var formatLog = {
 function checkLog(log) {
     return check(formatLog, log);
 }
-function stallPromise(allowNullFunc, executeFunc) {
-    return new Promise(function (resolve, reject) {
-        var attempt = 0;
-        function check() {
-            executeFunc().then(function (result) {
-                // If we have a result, or are allowed null then we're done
-                if (result || allowNullFunc()) {
-                    resolve(result);
-                    // Otherwise, exponential back-off (up to 10s) our next request
-                }
-                else {
-                    attempt++;
-                    var timeout = 500 + 250 * parseInt(String(Math.random() * (1 << attempt)));
-                    if (timeout > 10000) {
-                        timeout = 10000;
-                    }
-                    setTimeout(check, timeout);
-                }
-            }, function (error) {
-                reject(error);
-            });
-        }
-        check();
-    });
-}
 //////////////////////////////
 // Event Serializeing
 function recurse(object, convertFunc) {
@@ -867,12 +843,13 @@ var Provider = /** @class */ (function () {
                 try {
                     var blockHash = bytes_1.hexlify(blockHashOrBlockTag);
                     if (bytes_1.hexDataLength(blockHash) === 32) {
-                        return stallPromise(function () {
-                            return (_this._emitted['b:' + blockHash.toLowerCase()] == null);
-                        }, function () {
+                        return web_1.poll(function () {
                             return _this.perform('getBlock', { blockHash: blockHash }).then(function (block) {
                                 if (block == null) {
-                                    return null;
+                                    if (_this._emitted['b:' + blockHash.toLowerCase()] == null) {
+                                        return null;
+                                    }
+                                    return undefined;
                                 }
                                 return checkBlock(block);
                             });
@@ -881,16 +858,17 @@ var Provider = /** @class */ (function () {
                 }
                 catch (error) { }
                 try {
-                    var blockTag = checkBlockTag(blockHashOrBlockTag);
-                    return stallPromise(function () {
-                        if (bytes_1.isHexString(blockTag)) {
-                            var blockNumber = parseInt(blockTag.substring(2), 16);
-                            return blockNumber > _this._emitted.block;
-                        }
-                        return true;
-                    }, function () {
-                        return _this.perform('getBlock', { blockTag: blockTag }).then(function (block) {
+                    var blockNumber_1 = -128;
+                    var blockTag_1 = checkBlockTag(blockHashOrBlockTag);
+                    if (bytes_1.isHexString(blockTag_1)) {
+                        blockNumber_1 = parseInt(blockTag_1.substring(2), 16);
+                    }
+                    return web_1.poll(function () {
+                        return _this.perform('getBlock', { blockTag: blockTag_1 }).then(function (block) {
                             if (block == null) {
+                                if (blockNumber_1 > _this._emitted.block) {
+                                    return undefined;
+                                }
                                 return null;
                             }
                             return checkBlock(block);
@@ -908,14 +886,15 @@ var Provider = /** @class */ (function () {
             return properties_1.resolveProperties({ transactionHash: transactionHash }).then(function (_a) {
                 var transactionHash = _a.transactionHash;
                 var params = { transactionHash: checkHash(transactionHash) };
-                return stallPromise(function () {
-                    return (_this._emitted['t:' + transactionHash.toLowerCase()] == null);
-                }, function () {
+                return web_1.poll(function () {
                     return _this.perform('getTransaction', params).then(function (result) {
-                        if (result != null) {
-                            result = checkTransactionResponse(result);
+                        if (result == null) {
+                            if (_this._emitted['t:' + transactionHash.toLowerCase()] == null) {
+                                return null;
+                            }
+                            return undefined;
                         }
-                        return result;
+                        return checkTransactionResponse(result);
                     });
                 });
             });
@@ -927,14 +906,15 @@ var Provider = /** @class */ (function () {
             return properties_1.resolveProperties({ transactionHash: transactionHash }).then(function (_a) {
                 var transactionHash = _a.transactionHash;
                 var params = { transactionHash: checkHash(transactionHash) };
-                return stallPromise(function () {
-                    return (_this._emitted['t:' + transactionHash.toLowerCase()] == null);
-                }, function () {
+                return web_1.poll(function () {
                     return _this.perform('getTransactionReceipt', params).then(function (result) {
-                        if (result != null) {
-                            result = checkTransactionReceipt(result);
+                        if (result == null) {
+                            if (_this._emitted['t:' + transactionHash.toLowerCase()] == null) {
+                                return null;
+                            }
+                            return undefined;
                         }
-                        return result;
+                        return checkTransactionReceipt(result);
                     });
                 });
             });

src.ts/contracts/contract.ts

@@ -11,6 +11,7 @@ import { hexDataLength, hexDataSlice, isHexString } from '../utils/bytes';
 import { ParamType } from '../utils/abi-coder';
 import { BigNumber, ConstantZero } from '../utils/bignumber';
 import { defineReadOnly, shallowCopy } from '../utils/properties';
+import { poll } from '../utils/web';
 
 import * as errors from '../utils/errors';
 
@@ -330,6 +331,24 @@ export class Contract {
         this._onerror = callback;
     }
 
+    // @TODO: Allow timeout?
+    deployed() {
+        // If we were just deployed, we know the transaction we should occur in
+        if (this.deployTransaction) {
+            return this.deployTransaction.wait().then(() => {
+                return this;
+            });
+        }
+
+        // Otherwise, poll for our code to be deployed
+        return poll(() => {
+            return this.provider.getCode(this.address).then((code) => {
+                if (code === '0x') { return undefined; }
+                return this;
+            });
+        });
+    }
+
     // @TODO:
     // estimateFallback(overrides?: TransactionRequest): Promise<BigNumber>
 

src.ts/providers/json-rpc-provider.ts

@@ -109,7 +109,7 @@ export class JsonRpcSigner extends Signer {
     }
 
     sendTransaction(transaction: TransactionRequest): Promise<TransactionResponse> {
-        let tx = shallowCopy(transaction);
+        let tx: TransactionRequest = shallowCopy(transaction);
 
         if (tx.from == null) {
             tx.from = this.getAddress().then((address) => {

src.ts/providers/provider.ts

@@ -13,6 +13,7 @@ import { hashMessage, namehash } from '../utils/hash';
 import { getNetwork, Network, Networkish } from './networks';
 import { defineReadOnly, resolveProperties, shallowCopy } from '../utils/properties';
 import { parse as parseTransaction, serialize as serializeTransaction, SignDigestFunc, Transaction } from '../utils/transaction';
+import { poll } from '../utils/web';
 
 import * as errors from '../utils/errors';
 
@@ -505,35 +506,6 @@ function checkLog(log: any): any {
     return check(formatLog, log);
 }
 
-//////////////////////////////
-// Defer Promises
-
-type AllowNullFunc = () => boolean;
-type ExecuteFunc = () => Promise<any>
-function stallPromise(allowNullFunc: AllowNullFunc, executeFunc: ExecuteFunc): Promise<any> {
-    return new Promise(function(resolve, reject) {
-        var attempt = 0;
-        function check() {
-            executeFunc().then(function(result) {
-                // If we have a result, or are allowed null then we're done
-                if (result || allowNullFunc()) {
-                    resolve(result);
-
-                // Otherwise, exponential back-off (up to 10s) our next request
-                } else {
-                    attempt++;
-                    var timeout = 500 + 250 * parseInt(String(Math.random() * (1 << attempt)));
-                    if (timeout > 10000) { timeout = 10000; }
-                    setTimeout(check, timeout);
-                }
-            }, function(error) {
-                reject(error);
-            });
-        }
-        check();
-    });
-}
-
 //////////////////////////////
 // Event Serializeing
 
@@ -1037,28 +1009,37 @@ export class Provider {
                 try {
                     var blockHash = hexlify(blockHashOrBlockTag);
                     if (hexDataLength(blockHash) === 32) {
-                        return stallPromise(() => {
-                            return (this._emitted['b:' + blockHash.toLowerCase()] == null);
-                        }, () => {
-                            return this.perform('getBlock', {blockHash: blockHash}).then((block) => {
-                                if (block == null) { return null; }
+                        return poll(() => {
+                            return this.perform('getBlock', { blockHash: blockHash }).then((block) => {
+                                if (block == null) {
+                                    if (this._emitted['b:' + blockHash.toLowerCase()] == null) {
+                                        return null;
+                                    }
+                                    return undefined;
+                                }
                                 return checkBlock(block);
                             });
                         });
+
                     }
                 } catch (error) { }
 
                 try {
-                    var blockTag = checkBlockTag(blockHashOrBlockTag);
-                    return stallPromise(() => {
-                        if (isHexString(blockTag)) {
-                            var blockNumber = parseInt(blockTag.substring(2), 16);
-                            return blockNumber > this._emitted.block;
-                        }
-                        return true;
-                    }, () => {
+                    let blockNumber = -128;
+
+                    let blockTag = checkBlockTag(blockHashOrBlockTag);
+                    if (isHexString(blockTag)) {
+                        blockNumber = parseInt(blockTag.substring(2), 16);
+                    }
+
+                    return poll(() => {
                         return this.perform('getBlock', { blockTag: blockTag }).then((block) => {
-                            if (block == null) { return null; }
+                            if (block == null) {
+                                if (blockNumber > this._emitted.block) {
+                                    return undefined;
+                                }
+                                return null;
+                            }
                             return checkBlock(block);
                         });
                     });
@@ -1073,12 +1054,15 @@ export class Provider {
         return this.ready.then(() => {
             return resolveProperties({ transactionHash: transactionHash }).then(({ transactionHash }) => {
                 var params = { transactionHash: checkHash(transactionHash) };
-                return stallPromise(() => {
-                    return (this._emitted['t:' + transactionHash.toLowerCase()] == null);
-                }, () => {
+                return poll(() => {
                     return this.perform('getTransaction', params).then((result) => {
-                        if (result != null) { result = checkTransactionResponse(result); }
-                        return result;
+                        if (result == null) {
+                            if (this._emitted['t:' + transactionHash.toLowerCase()] == null) {
+                                return null;
+                            }
+                            return undefined;
+                        }
+                        return checkTransactionResponse(result);
                     });
                 });
             });
@@ -1089,12 +1073,15 @@ export class Provider {
         return this.ready.then(() => {
             return resolveProperties({ transactionHash: transactionHash }).then(({ transactionHash }) => {
                 var params = { transactionHash: checkHash(transactionHash) };
-                return stallPromise(() => {
-                    return (this._emitted['t:' + transactionHash.toLowerCase()] == null);
-                }, () => {
+                return poll(() => {
                     return this.perform('getTransactionReceipt', params).then((result) => {
-                        if (result != null) { result = checkTransactionReceipt(result); }
-                        return result;
+                        if (result == null) {
+                            if (this._emitted['t:' + transactionHash.toLowerCase()] == null) {
+                                return null;
+                            }
+                            return undefined;
+                        }
+                        return checkTransactionReceipt(result);
                     });
                 });
             });

src.ts/utils/web.ts

@@ -120,3 +120,61 @@ export function fetchJson(connection: string | ConnectionInfo, json: string, pro
     });
 }
 
+export type PollOptions = {
+    timeout?: number,
+    floor?: number,
+    ceiling?: number,
+    interval?: number
+};
+
+export function poll(func: () => Promise<any>, options?: PollOptions): Promise<any> {
+    if (!options) { options = {}; }
+    if (options.floor == null) { options.floor = 0; }
+    if (options.ceiling == null) { options.ceiling = 10000; }
+    if (options.interval == null) { options.interval = 250; }
+
+    return new Promise(function(resolve, reject) {
+
+        let timer: any = null;
+        let done: boolean = false;
+
+        // Returns true if cancel was successful. Unsuccessful cancel means we're already done.
+        let cancel = (): boolean => {
+            if (done) { return false; }
+            done = true;
+            if (timer) { clearTimeout(timer); }
+            return true;
+        };
+
+        if (options.timeout) {
+            timer = setTimeout(() => {
+                if (cancel()) { reject(new Error('timeout')); }
+            }, options.timeout)
+        }
+
+        let attempt = 0;
+        function check() {
+            func().then(function(result) {
+
+                // If we have a result, or are allowed null then we're done
+                if (result !== undefined) {
+                    if (cancel()) { resolve(result); }
+
+                // Otherwise, exponential back-off (up to 10s) our next request
+                } else if (!done) {
+                    attempt++;
+
+                    let timeout = options.interval * parseInt(String(Math.random() * Math.pow(2, attempt)));
+                    if (timeout < options.floor) { timeout = options.floor; }
+                    if (timeout > options.ceiling) { timeout = options.ceiling; }
+
+                    setTimeout(check, timeout);
+                }
+            }, function(error) {
+                if (cancel()) { reject(error); }
+            });
+        }
+        check();
+    });
+}
+

utils/abi-coder.js

@@ -286,6 +286,18 @@ var Coder = /** @class */ (function () {
     }
     return Coder;
 }());
+// Clones the functionality of an existing Coder, but without a localName
+var CoderAnonymous = /** @class */ (function (_super) {
+    __extends(CoderAnonymous, _super);
+    function CoderAnonymous(coder) {
+        var _this = _super.call(this, coder.coerceFunc, coder.name, coder.type, undefined, coder.dynamic) || this;
+        properties_1.defineReadOnly(_this, 'coder', coder);
+        return _this;
+    }
+    CoderAnonymous.prototype.encode = function (value) { return this.coder.encode(value); };
+    CoderAnonymous.prototype.decode = function (data, offset) { return this.coder.decode(data, offset); };
+    return CoderAnonymous;
+}(Coder));
 var CoderNull = /** @class */ (function (_super) {
     __extends(CoderNull, _super);
     function CoderNull(coerceFunc, localName) {
@@ -710,7 +722,7 @@ var CoderArray = /** @class */ (function (_super) {
         }
         var coders = [];
         for (var i = 0; i < count; i++) {
-            coders.push(this.coder);
+            coders.push(new CoderAnonymous(this.coder));
         }
         var result = unpack(coders, data, offset);
         result.consumed += consumed;

utils/web.js

@@ -102,3 +102,68 @@ function fetchJson(connection, json, processFunc) {
     });
 }
 exports.fetchJson = fetchJson;
+function poll(func, options) {
+    if (!options) {
+        options = {};
+    }
+    if (options.floor == null) {
+        options.floor = 0;
+    }
+    if (options.ceiling == null) {
+        options.ceiling = 10000;
+    }
+    if (options.interval == null) {
+        options.interval = 250;
+    }
+    return new Promise(function (resolve, reject) {
+        var timer = null;
+        var done = false;
+        // Returns true if cancel was successful. Unsuccessful cancel means we're already done.
+        var cancel = function () {
+            if (done) {
+                return false;
+            }
+            done = true;
+            if (timer) {
+                clearTimeout(timer);
+            }
+            return true;
+        };
+        if (options.timeout) {
+            timer = setTimeout(function () {
+                if (cancel()) {
+                    reject(new Error('timeout'));
+                }
+            }, options.timeout);
+        }
+        var attempt = 0;
+        function check() {
+            func().then(function (result) {
+                // If we have a result, or are allowed null then we're done
+                if (result !== undefined) {
+                    if (cancel()) {
+                        resolve(result);
+                    }
+                    // Otherwise, exponential back-off (up to 10s) our next request
+                }
+                else if (!done) {
+                    attempt++;
+                    var timeout = options.interval * parseInt(String(Math.random() * Math.pow(2, attempt)));
+                    if (timeout < options.floor) {
+                        timeout = options.floor;
+                    }
+                    if (timeout > options.ceiling) {
+                        timeout = options.ceiling;
+                    }
+                    setTimeout(check, timeout);
+                }
+            }, function (error) {
+                if (cancel()) {
+                    reject(error);
+                }
+            });
+        }
+        check();
+    });
+}
+exports.poll = poll;