jsre:

- require became loadScript(), no require is supplied
- bignumber_js.go: heredoc v2.0.3 minified fixed for otto Regexp incompatibility https://github.com/robertkrimen/otto#regular-expression-incompatibility
- bignumber.min.js also updated in mist/assets/ext
- ethereum_js.go: latest master minified
- assetPath in constructor
- Eval/Exec/Handle/ToVal nice API
- jsre tests

5 files changed, 264 insertions, 0 deletions

diff --git a/jsre/bignumber_js.go b/jsre/bignumber_js.go
new file mode 100644
index 000000000..7902018be
--- /dev/null
+++ b/jsre/bignumber_js.go
@@ -0,0 +1,6 @@
+package jsre
+
+const BigNumber_JS = `/* bignumber.js v2.0.3 https://github.com/MikeMcl/bignumber.js/LICENCE */
+/* modified by zelig to fix https://github.com/robertkrimen/otto#regular-expression-incompatibility */
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+//# sourceMappingURL=doc/bignumber.js.map`
diff --git a/jsre/ethereum_js.go b/jsre/ethereum_js.go
new file mode 100644
index 000000000..8b2f6e9dd
--- /dev/null
+++ b/jsre/ethereum_js.go
@@ -0,0 +1,3 @@
+package jsre
+
+const Ethereum_JS = `require=function t(e,n,r){function o(i,u){if(!n[i]){if(!e[i]){var s="function"==typeof require&&require;if(!u&&s)return s(i,!0);if(a)return a(i,!0);var c=new Error("Cannot find module '"+i+"'");throw c.code="MODULE_NOT_FOUND",c}var l=n[i]={exports:{}};e[i][0].call(l.exports,function(t){var n=e[i][1][t];return o(n?n:t)},l,l.exports,t,e,n,r)}return n[i].exports}for(var a="function"==typeof require&&require,i=0;i<r.length;i++)o(r[i]);return o}({1:[function(t,e){var n=t("../utils/utils"),r=t("../utils/config"),o=t("./types"),a=t("./formatters"),i=function(t){throw new Error("parser does not support type: "+t)},u=function(t){return"[]"===t.slice(-2)},s=function(t,e){return u(t)||"string"===t?a.formatInputInt(e.length):""},c=o.inputTypes(),l=function(t,e){var n="",r="",o="";return t.forEach(function(t,r){n+=s(t.type,e[r])}),t.forEach(function(n,a){for(var s=!1,l=0;l<c.length&&!s;l++)s=c[l].type(t[a].type,e[a]);s||i(t[a].type);var f=c[l-1].format;u(t[a].type)?o+=e[a].reduce(function(t,e){return t+f(e)},""):"string"===t[a].type?o+=f(e[a]):r+=f(e[a])}),n+=r+o},f=function(t){return u(t)||"string"===t?2*r.ETH_PADDING:0},p=o.outputTypes(),m=function(t,e){e=e.slice(2);var n=[],s=2*r.ETH_PADDING,c=t.reduce(function(t,e){return t+f(e.type)},0),l=e.slice(0,c);return e=e.slice(c),t.forEach(function(r,c){for(var f=!1,m=0;m<p.length&&!f;m++)f=p[m].type(t[c].type);f||i(t[c].type);var d=p[m-1].format;if(u(t[c].type)){var h=a.formatOutputUInt(l.slice(0,s));l=l.slice(s);for(var g=[],y=0;h>y;y++)g.push(d(e.slice(0,s))),e=e.slice(s);n.push(g)}else o.prefixedType("string")(t[c].type)?(l=l.slice(s),n.push(d(e.slice(0,s))),e=e.slice(s)):(n.push(d(e.slice(0,s))),e=e.slice(s))}),n},d=function(t){var e={};return t.forEach(function(t){var r=n.extractDisplayName(t.name),o=n.extractTypeName(t.name),a=function(){var e=Array.prototype.slice.call(arguments);return l(t.inputs,e)};void 0===e[r]&&(e[r]=a),e[r][o]=a}),e},h=function(t){var e={};return t.forEach(function(t){var r=n.extractDisplayName(t.name),o=n.extractTypeName(t.name),a=function(e){return m(t.outputs,e)};void 0===e[r]&&(e[r]=a),e[r][o]=a}),e};e.exports={inputParser:d,outputParser:h,formatInput:l,formatOutput:m}},{"../utils/config":4,"../utils/utils":5,"./formatters":2,"./types":3}],2:[function(t,e){var n=t("../utils/utils"),r=t("../utils/config"),o=function(t,e,n){return new Array(e-t.length+1).join(n?n:"0")+t},a=function(t){var e=2*r.ETH_PADDING;return BigNumber.config(r.ETH_BIGNUMBER_ROUNDING_MODE),o(n.toTwosComplement(t).round().toString(16),e)},i=function(t){return n.fromAscii(t,r.ETH_PADDING).substr(2)},u=function(t){return"000000000000000000000000000000000000000000000000000000000000000"+(t?"1":"0")},s=function(t){return a(new BigNumber(t).times(new BigNumber(2).pow(128)))},c=function(t){return"1"===new BigNumber(t.substr(0,1),16).toString(2).substr(0,1)},l=function(t){return t=t||"0",c(t)?new BigNumber(t,16).minus(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16)).minus(1):new BigNumber(t,16)},f=function(t){return t=t||"0",new BigNumber(t,16)},p=function(t){return l(t).dividedBy(new BigNumber(2).pow(128))},m=function(t){return f(t).dividedBy(new BigNumber(2).pow(128))},d=function(t){return"0x"+t},h=function(t){return"0000000000000000000000000000000000000000000000000000000000000001"===t?!0:!1},g=function(t){return n.toAscii(t)},y=function(t){return"0x"+t.slice(t.length-40,t.length)};e.exports={formatInputInt:a,formatInputString:i,formatInputBool:u,formatInputReal:s,formatOutputInt:l,formatOutputUInt:f,formatOutputReal:p,formatOutputUReal:m,formatOutputHash:d,formatOutputBool:h,formatOutputString:g,formatOutputAddress:y}},{"../utils/config":4,"../utils/utils":5}],3:[function(t,e){var n=t("./formatters"),r=function(t){return function(e){return 0===e.indexOf(t)}},o=function(t){return function(e){return t===e}},a=function(){return[{type:r("uint"),format:n.formatInputInt},{type:r("int"),format:n.formatInputInt},{type:r("hash"),format:n.formatInputInt},{type:r("string"),format:n.formatInputString},{type:r("real"),format:n.formatInputReal},{type:r("ureal"),format:n.formatInputReal},{type:o("address"),format:n.formatInputInt},{type:o("bool"),format:n.formatInputBool}]},i=function(){return[{type:r("uint"),format:n.formatOutputUInt},{type:r("int"),format:n.formatOutputInt},{type:r("hash"),format:n.formatOutputHash},{type:r("string"),format:n.formatOutputString},{type:r("real"),format:n.formatOutputReal},{type:r("ureal"),format:n.formatOutputUReal},{type:o("address"),format:n.formatOutputAddress},{type:o("bool"),format:n.formatOutputBool}]};e.exports={prefixedType:r,namedType:o,inputTypes:a,outputTypes:i}},{"./formatters":2}],4:[function(t,e){var n=["wei","Kwei","Mwei","Gwei","szabo","finney","ether","grand","Mether","Gether","Tether","Pether","Eether","Zether","Yether","Nether","Dether","Vether","Uether"];e.exports={ETH_PADDING:32,ETH_SIGNATURE_LENGTH:4,ETH_UNITS:n,ETH_BIGNUMBER_ROUNDING_MODE:{ROUNDING_MODE:BigNumber.ROUND_DOWN},ETH_POLLING_TIMEOUT:1e3,ETH_DEFAULTBLOCK:"latest"}},{}],5:[function(t,e){var n={wei:"1",kwei:"1000",ada:"1000",mwei:"1000000",babbage:"1000000",gwei:"1000000000",shannon:"1000000000",szabo:"1000000000000",finney:"1000000000000000",ether:"1000000000000000000",kether:"1000000000000000000000",grand:"1000000000000000000000",einstein:"1000000000000000000000",mether:"1000000000000000000000000",gether:"1000000000000000000000000000",tether:"1000000000000000000000000000000"},r=function(t,e){for(var n=!1,r=0;r<t.length&&!n;r++)n=e(t[r]);return n?r-1:-1},o=function(t){var e="",n=0,r=t.length;for("0x"===t.substring(0,2)&&(n=2);r>n;n+=2){var o=parseInt(t.substr(n,2),16);if(0===o)break;e+=String.fromCharCode(o)}return e},a=function(t){for(var e="",n=0;n<t.length;n++){var r=t.charCodeAt(n).toString(16);e+=r.length<2?"0"+r:r}return e},i=function(t,e){e=void 0===e?0:e;for(var n=a(t);n.length<2*e;)n+="00";return"0x"+n},u=function(t){var e=t.indexOf("(");return-1!==e?t.substr(0,e):t},s=function(t){var e=t.indexOf("(");return-1!==e?t.substr(e+1,t.length-1-(e+1)).replace(" ",""):""},c=function(t){return t.filter(function(t){return"function"===t.type})},l=function(t){return t.filter(function(t){return"event"===t.type})},f=function(t){return y(t).toNumber()},p=function(t){var e=y(t),n=e.toString(16);return e.lessThan(0)?"-0x"+n.substr(1):"0x"+n},m=function(t){if(B(t))return t;if(w(t))return p(t);if(T(t))return i(JSON.stringify(t));if(_(t)){if(0===t.indexOf("-0x"))return p(t);if(!isFinite(t))return i(t)}return p(t)},d=function(t){t=t?t.toLowerCase():"ether";var e=n[t];if(void 0===e)throw new Error("This unit doesn't exists, please use the one of the following units"+JSON.stringify(n,null,2));return new BigNumber(e,10)},h=function(t,e){var n=y(t).dividedBy(d(e));return w(t)?n:n.toString(10)},g=function(t,e){var n=y(t).times(d(e));return w(t)?n:n.toString(10)},y=function(t){return t=t||0,w(t)?t:!_(t)||0!==t.indexOf("0x")&&0!==t.indexOf("-0x")?new BigNumber(t.toString(10),10):new BigNumber(t.replace("0x",""),16)},b=function(t){var e=y(t);return e.lessThan(0)?new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16).plus(e).plus(1):e},v=function(t){return _(t)?0===t.indexOf("0x")&&42===t.length||-1===t.indexOf("0x")&&40===t.length:!1},w=function(t){return t instanceof BigNumber||t&&t.constructor&&"BigNumber"===t.constructor.name},_=function(t){return"string"==typeof t||t&&t.constructor&&"String"===t.constructor.name},x=function(t){return"function"==typeof t},T=function(t){return"object"==typeof t},B=function(t){return"boolean"==typeof t},F=function(t){return t instanceof Array};e.exports={findIndex:r,toHex:m,toDecimal:f,fromDecimal:p,toAscii:o,fromAscii:i,extractDisplayName:u,extractTypeName:s,filterFunctions:c,filterEvents:l,toWei:g,fromWei:h,toBigNumber:y,toTwosComplement:b,isBigNumber:w,isAddress:v,isFunction:x,isString:_,isObject:T,isBoolean:B,isArray:F}},{}],6:[function(t,e){var n=t("./web3/net"),r=t("./web3/eth"),o=t("./web3/db"),a=t("./web3/shh"),i=t("./web3/watches"),u=t("./web3/filter"),s=t("./utils/utils"),c=t("./solidity/formatters"),l=t("./web3/requestmanager"),f=t("./utils/config"),p=function(){return[{name:"sha3",call:"web3_sha3"}]},m=function(t,e){e.forEach(function(e){var n=e.name.split("."),r=function(){var t=null,n=Array.prototype.slice.call(arguments),r="function"==typeof e.call?e.call(n):e.call;return"function"==typeof n[n.length-1]&&(t=n[n.length-1],Array.prototype.pop.call(n)),e.addDefaultblock&&(n.length!==e.addDefaultblock?Array.prototype.push.call(n,isFinite(f.ETH_DEFAULTBLOCK)?s.fromDecimal(f.ETH_DEFAULTBLOCK):f.ETH_DEFAULTBLOCK):n[n.length-1]=isFinite(n[n.length-1])?s.fromDecimal(n[n.length-1]):n[n.length-1]),e.newMethod&&console.warn("This method is deprecated please use web3."+e.newMethod+"() instead."),v.manager.send({method:r,params:n,outputFormatter:e.outputFormatter,inputFormatter:e.inputFormatter,addDefaultblock:e.addDefaultblock},t)};n.length>1?(t[n[0]]||(t[n[0]]={}),t[n[0]][n[1]]=r):t[n[0]]=r})},d=function(t,e){e.forEach(function(e){var n={};n.get=function(){return e.newProperty&&console.warn("This property is deprecated please use web3."+e.newProperty+" instead."),v.manager.send({method:e.getter,outputFormatter:e.outputFormatter})},e.setter&&(n.set=function(t){return e.newProperty&&console.warn("This property is deprecated please use web3."+e.newProperty+" instead."),v.manager.send({method:e.setter,params:[t],inputFormatter:e.inputFormatter})}),n.enumerable=!e.newProperty,Object.defineProperty(t,e.name,n)})},h=function(t,e,n,r){v.manager.startPolling({method:t,params:[e]},e,n,r)},g=function(t){v.manager.stopPolling(t)},y={startPolling:h.bind(null,"eth_getFilterChanges"),stopPolling:g},b={startPolling:h.bind(null,"shh_getFilterChanges"),stopPolling:g},v={manager:l(),providers:{},setProvider:function(t){v.manager.setProvider(t)},reset:function(){v.manager.reset()},toHex:s.toHex,toAscii:s.toAscii,fromAscii:s.fromAscii,toDecimal:s.toDecimal,fromDecimal:s.fromDecimal,toBigNumber:s.toBigNumber,toWei:s.toWei,fromWei:s.fromWei,isAddress:s.isAddress,net:{},eth:{contractFromAbi:function(t){return console.warn("Initiating a contract like this is deprecated please use var MyContract = eth.contract(abi); new MyContract(address); instead."),function(e){e=e||"0xc6d9d2cd449a754c494264e1809c50e34d64562b";var n=v.eth.contract(e,t);return n.address=e,n}},filter:function(t,e,n){return t._isEvent?t(e,n):u(t,y,c.outputLogFormatter)},watch:function(t,e,n){return console.warn("eth.watch() is deprecated please use eth.filter() instead."),this.filter(t,e,n)}},db:{},shh:{filter:function(t){return u(t,b,c.outputPostFormatter)},watch:function(t){return console.warn("shh.watch() is deprecated please use shh.filter() instead."),this.filter(t)}}};Object.defineProperty(v.eth,"defaultBlock",{get:function(){return f.ETH_DEFAULTBLOCK},set:function(t){return f.ETH_DEFAULTBLOCK=t,f.ETH_DEFAULTBLOCK}}),m(v,p()),m(v.net,n.methods),d(v.net,n.properties),m(v.eth,r.methods),d(v.eth,r.properties),m(v.db,o.methods()),m(v.shh,a.methods()),m(y,i.eth()),m(b,i.shh()),e.exports=v},{"./solidity/formatters":2,"./utils/config":4,"./utils/utils":5,"./web3/db":8,"./web3/eth":9,"./web3/filter":11,"./web3/net":15,"./web3/requestmanager":17,"./web3/shh":18,"./web3/watches":20}],7:[function(t,e){function n(t,e){t.forEach(function(t){if(-1===t.name.indexOf("(")){var e=t.name,n=t.inputs.map(function(t){return t.type}).join();t.name=e+"("+n+")"}});var n={};return c(n),l(n,t,e),f(n,t,e),p(n,t,e),n}var r=t("../web3"),o=t("../solidity/abi"),a=t("../utils/utils"),i=t("./event"),u=t("./signature"),s=function(t){r._currentContractAbi=t.abi,r._currentContractAddress=t.address,r._currentContractMethodName=t.method,r._currentContractMethodParams=t.params},c=function(t){t.call=function(e){return t._isTransaction=!1,t._options=e,t},t.sendTransaction=function(e){return t._isTransaction=!0,t._options=e,t},t.transact=function(e){return console.warn("myContract.transact() is deprecated please use myContract.sendTransaction() instead."),t.sendTransaction(e)},t._options={},["gas","gasPrice","value","from"].forEach(function(e){t[e]=function(n){return t._options[e]=n,t}})},l=function(t,e,n){var i=o.inputParser(e),c=o.outputParser(e);a.filterFunctions(e).forEach(function(o){var l=a.extractDisplayName(o.name),f=a.extractTypeName(o.name),p=function(){var a=Array.prototype.slice.call(arguments),p=u.functionSignatureFromAscii(o.name),m=i[l][f].apply(null,a),d=t._options||{};d.to=n,d.data=p+m;var h=t._isTransaction===!0||t._isTransaction!==!1&&!o.constant,g=d.collapse!==!1;if(t._options={},t._isTransaction=null,h)return s({abi:e,address:n,method:o.name,params:a}),void r.eth.sendTransaction(d);var y=r.eth.call(d),b=c[l][f](y);return g&&(1===b.length?b=b[0]:0===b.length&&(b=null)),b};void 0===t[l]&&(t[l]=p),t[l][f]=p})},f=function(t,e,n){t.address=n,t._onWatchEventResult=function(t){var n=event.getMatchingEvent(a.filterEvents(e)),r=i.outputParser(n);return r(t)},Object.defineProperty(t,"topics",{get:function(){return a.filterEvents(e).map(function(t){return u.eventSignatureFromAscii(t.name)})}})},p=function(t,e,n){a.filterEvents(e).forEach(function(e){var o=function(){var t=Array.prototype.slice.call(arguments),o=u.eventSignatureFromAscii(e.name),a=i.inputParser(n,o,e),s=a.apply(null,t),c=function(t){var n=i.outputParser(e);return n(t)};return r.eth.filter(s,void 0,void 0,c)};o._isEvent=!0;var s=a.extractDisplayName(e.name),c=a.extractTypeName(e.name);void 0===t[s]&&(t[s]=o),t[s][c]=o})},m=function(t){return t instanceof Array&&1===arguments.length?n.bind(null,t):(console.warn("Initiating a contract like this is deprecated please use var MyContract = eth.contract(abi); new MyContract(address); instead."),new n(arguments[1],arguments[0]))};e.exports=m},{"../solidity/abi":1,"../utils/utils":5,"../web3":6,"./event":10,"./signature":19}],8:[function(t,e){var n=function(){return[{name:"put",call:"db_put"},{name:"get",call:"db_get"},{name:"putString",call:"db_putString"},{name:"getString",call:"db_getString"}]};e.exports={methods:n}},{}],9:[function(t,e){var n=t("./formatters"),r=t("../utils/utils"),o=function(t){return r.isString(t[0])&&0===t[0].indexOf("0x")?"eth_getBlockByHash":"eth_getBlockByNumber"},a=function(t){return r.isString(t[0])&&0===t[0].indexOf("0x")?"eth_getTransactionByBlockHashAndIndex":"eth_getTransactionByBlockNumberAndIndex"},i=function(t){return r.isString(t[0])&&0===t[0].indexOf("0x")?"eth_getUncleByBlockHashAndIndex":"eth_getUncleByBlockNumberAndIndex"},u=function(t){return r.isString(t[0])&&0===t[0].indexOf("0x")?"eth_getBlockTransactionCountByHash":"eth_getBlockTransactionCountByNumber"},s=function(t){return r.isString(t[0])&&0===t[0].indexOf("0x")?"eth_getUncleCountByBlockHash":"eth_getUncleCountByBlockNumber"},c=[{name:"getBalance",call:"eth_getBalance",addDefaultblock:2,outputFormatter:n.convertToBigNumber},{name:"getStorage",call:"eth_getStorage",addDefaultblock:2},{name:"getStorageAt",call:"eth_getStorageAt",addDefaultblock:3,inputFormatter:r.toHex},{name:"getData",call:"eth_getData",addDefaultblock:2},{name:"getBlock",call:o,outputFormatter:n.outputBlockFormatter,inputFormatter:[r.toHex,function(t){return t?!0:!1}]},{name:"getUncle",call:i,outputFormatter:n.outputBlockFormatter,inputFormatter:[r.toHex,r.toHex,function(t){return t?!0:!1}]},{name:"getCompilers",call:"eth_getCompilers"},{name:"getBlockTransactionCount",call:u,outputFormatter:r.toDecimal,inputFormatter:r.toHex},{name:"getBlockUncleCount",call:s,outputFormatter:r.toDecimal,inputFormatter:r.toHex},{name:"getTransaction",call:"eth_getTransactionByHash",outputFormatter:n.outputTransactionFormatter},{name:"getTransactionFromBlock",call:a,outputFormatter:n.outputTransactionFormatter,inputFormatter:r.toHex},{name:"getTransactionCount",call:"eth_getTransactionCount",addDefaultblock:2,outputFormatter:r.toDecimal},{name:"sendTransaction",call:"eth_sendTransaction",inputFormatter:n.inputTransactionFormatter},{name:"call",call:"eth_call",addDefaultblock:2,inputFormatter:n.inputCallFormatter},{name:"compile.solidity",call:"eth_compileSolidity",inputFormatter:r.toHex},{name:"compile.lll",call:"eth_compileLLL",inputFormatter:r.toHex},{name:"compile.serpent",call:"eth_compileSerpent",inputFormatter:r.toHex},{name:"flush",call:"eth_flush"},{name:"balanceAt",call:"eth_balanceAt",newMethod:"eth.getBalance"},{name:"stateAt",call:"eth_stateAt",newMethod:"eth.getStorageAt"},{name:"storageAt",call:"eth_storageAt",newMethod:"eth.getStorage"},{name:"countAt",call:"eth_countAt",newMethod:"eth.getTransactionCount"},{name:"codeAt",call:"eth_codeAt",newMethod:"eth.getData"},{name:"transact",call:"eth_transact",newMethod:"eth.sendTransaction"},{name:"block",call:o,newMethod:"eth.getBlock"},{name:"transaction",call:a,newMethod:"eth.getTransaction"},{name:"uncle",call:i,newMethod:"eth.getUncle"},{name:"compilers",call:"eth_compilers",newMethod:"eth.getCompilers"},{name:"solidity",call:"eth_solidity",newMethod:"eth.compile.solidity"},{name:"lll",call:"eth_lll",newMethod:"eth.compile.lll"},{name:"serpent",call:"eth_serpent",newMethod:"eth.compile.serpent"},{name:"transactionCount",call:u,newMethod:"eth.getBlockTransactionCount"},{name:"uncleCount",call:s,newMethod:"eth.getBlockUncleCount"},{name:"logs",call:"eth_logs"}],l=[{name:"coinbase",getter:"eth_coinbase"},{name:"mining",getter:"eth_mining"},{name:"gasPrice",getter:"eth_gasPrice",outputFormatter:n.convertToBigNumber},{name:"accounts",getter:"eth_accounts"},{name:"blockNumber",getter:"eth_blockNumber",outputFormatter:r.toDecimal},{name:"listening",getter:"net_listening",setter:"eth_setListening",newProperty:"net.listening"},{name:"peerCount",getter:"net_peerCount",newProperty:"net.peerCount"},{name:"number",getter:"eth_number",newProperty:"eth.blockNumber"}];e.exports={methods:c,properties:l}},{"../utils/utils":5,"./formatters":12}],10:[function(t,e){var n=t("../solidity/abi"),r=t("../utils/utils"),o=t("./signature"),a=function(t,e){return t.filter(function(t){return t.indexed===e})},i=function(t,e){var n=r.findIndex(t,function(t){return t.name===e});return-1===n?void console.error("indexed param with name "+e+" not found"):t[n]},u=function(t,e){return Object.keys(e).map(function(r){var o=[i(a(t.inputs,!0),r)],u=e[r];return u instanceof Array?u.map(function(t){return n.formatInput(o,[t])}):n.formatInput(o,[u])})},s=function(t,e,n){return function(r,o){var a=o||{};return a.address=t,a.topics=[],a.topics.push(e),r&&(a.topics=a.topics.concat(u(n,r))),a}},c=function(t,e,n){var r=e.slice(),o=n.slice();return t.reduce(function(t,e){var n;return n=e.indexed?r.splice(0,1)[0]:o.splice(0,1)[0],t[e.name]=n,t},{})},l=function(t){return function(e){var o={event:r.extractDisplayName(t.name),number:e.number,hash:e.hash,args:{}};if(e.topics=e.topic,!e.topics)return o;var i=a(t.inputs,!0),u="0x"+e.topics.slice(1,e.topics.length).map(function(t){return t.slice(2)}).join(""),s=n.formatOutput(i,u),l=a(t.inputs,!1),f=n.formatOutput(l,e.data);return o.args=c(t.inputs,s,f),o}},f=function(t,e){for(var n=0;n<t.length;n++){var r=o.eventSignatureFromAscii(t[n].name);if(r===e.topics[0])return t[n]}return void 0};e.exports={inputParser:s,outputParser:l,getMatchingEvent:f}},{"../solidity/abi":1,"../utils/utils":5,"./signature":19}],11:[function(t,e){var n=t("../utils/utils"),r=function(t){return!!t&&"function"==typeof t.newFilter&&"function"==typeof t.getLogs&&"function"==typeof t.uninstallFilter&&"function"==typeof t.startPolling&&"function"==typeof t.stopPolling},o=function(t){return"string"==typeof t?t:(t=t||{},t.topic&&(console.warn('"topic" is deprecated, is "topics" instead'),t.topics=t.topic),t.earliest&&(console.warn('"earliest" is deprecated, is "fromBlock" instead'),t.fromBlock=t.earliest),t.latest&&(console.warn('"latest" is deprecated, is "toBlock" instead'),t.toBlock=t.latest),t.skip&&(console.warn('"skip" is deprecated, is "offset" instead'),t.offset=t.skip),t.max&&(console.warn('"max" is deprecated, is "limit" instead'),t.limit=t.max),t.topics instanceof Array&&(t.topics=t.topics.map(function(t){return n.toHex(t)})),{fromBlock:n.toHex(t.fromBlock),toBlock:n.toHex(t.toBlock),limit:n.toHex(t.limit),offset:n.toHex(t.offset),to:t.to,address:t.address,topics:t.topics})},a=function(t,e,a){if(!r(e))return void console.error("filter implemenation is invalid");t=o(t);var i=[],u=e.newFilter(t),s=function(t){t.forEach(function(t){t=a?a(t):t,i.forEach(function(e){e(t)})})};e.startPolling(u,s,e.uninstallFilter);var c=function(t){i.push(t)},l=function(){e.stopPolling(u),e.uninstallFilter(u),i=[]},f=function(){var t=e.getLogs(u);return n.isArray(t)?t.map(function(t){return a?a(t):t}):t};return{watch:c,stopWatching:l,get:f,changed:function(){return console.warn("watch().changed() is deprecated please use filter().watch() instead."),c.apply(this,arguments)},arrived:function(){return console.warn("watch().arrived() is deprecated please use filter().watch() instead."),c.apply(this,arguments)},happened:function(){return console.warn("watch().happened() is deprecated please use filter().watch() instead."),c.apply(this,arguments)},uninstall:function(){return console.warn("watch().uninstall() is deprecated please use filter().stopWatching() instead."),l.apply(this,arguments)},messages:function(){return console.warn("watch().messages() is deprecated please use filter().get() instead."),f.apply(this,arguments)},logs:function(){return console.warn("watch().logs() is deprecated please use filter().get() instead."),f.apply(this,arguments)}}};e.exports=a},{"../utils/utils":5}],12:[function(t,e){var n=t("../utils/utils"),r=function(t){return n.toBigNumber(t)},o=function(t){return t.code&&(t.data=t.code,delete t.code),["gasPrice","gas","value"].forEach(function(e){t[e]=n.fromDecimal(t[e])}),t},a=function(t){return t.gas=n.toDecimal(t.gas),t.gasPrice=n.toBigNumber(t.gasPrice),t.value=n.toBigNumber(t.value),t},i=function(t){return t.code&&(t.data=t.code,delete t.code),t},u=function(t){return t.gasLimit=n.toDecimal(t.gasLimit),t.gasUsed=n.toDecimal(t.gasUsed),t.size=n.toDecimal(t.size),t.timestamp=n.toDecimal(t.timestamp),t.number=n.toDecimal(t.number),t.minGasPrice=n.toBigNumber(t.minGasPrice),t.difficulty=n.toBigNumber(t.difficulty),t.totalDifficulty=n.toBigNumber(t.totalDifficulty),t.transactions instanceof Array&&t.transactions.forEach(function(t){return n.isString(t)?void 0:a(t)}),t},s=function(t){return t.blockNumber=n.toDecimal(t.blockNumber),t.transactionIndex=n.toDecimal(t.transactionIndex),t.logIndex=n.toDecimal(t.logIndex),t},c=function(t){return t.payload=n.toHex(t.payload),t.ttl=n.fromDecimal(t.ttl),t.priority=n.fromDecimal(t.priority),t.topics instanceof Array||(t.topics=[t.topics]),t.topics=t.topics.map(function(t){return n.fromAscii(t)}),t},l=function(t){if(t.expiry=n.toDecimal(t.expiry),t.sent=n.toDecimal(t.sent),t.ttl=n.toDecimal(t.ttl),t.workProved=n.toDecimal(t.workProved),t.payloadRaw=t.payload,t.payload=n.toAscii(t.payload),0===t.payload.indexOf("{")||0===t.payload.indexOf("["))try{t.payload=JSON.parse(t.payload)}catch(e){}return t.topics=t.topics.map(function(t){return n.toAscii(t)}),t};e.exports={convertToBigNumber:r,inputTransactionFormatter:o,outputTransactionFormatter:a,inputCallFormatter:i,outputBlockFormatter:u,outputLogFormatter:s,inputPostFormatter:c,outputPostFormatter:l}},{"../utils/utils":5}],13:[function(t,e){var n=function(t){this.name="HTTP",this.handlers=[],this.host=t||"http://localhost:8080"};n.prototype.send=function(t,e){var n=new XMLHttpRequest;if(n.open("POST",this.host,!1),"function"!=typeof e){if(n.open("POST",this.host,!1),n.send(JSON.stringify(t)),200!==n.status)return;return JSON.parse(n.responseText)}n.onreadystatechange=function(){if(4===n.readyState){var t="";try{t=JSON.parse(n.responseText)}catch(r){t=r}e(t,n.status)}},n.open("POST",this.host,!0),n.send(JSON.stringify(t))},e.exports=n},{}],14:[function(t,e){var n=1,r=function(t,e){return t||console.error("jsonrpc method should be specified!"),{jsonrpc:"2.0",method:t,params:e||[],id:n++}},o=function(t){return!!t&&!t.error&&"2.0"===t.jsonrpc&&"number"==typeof t.id&&void 0!==t.result},a=function(t){return t.map(function(t){return r(t.method,t.params)})};e.exports={toPayload:r,isValidResponse:o,toBatchPayload:a}},{}],15:[function(t,e){var n=t("../utils/utils"),r=[],o=[{name:"listening",getter:"net_listening"},{name:"peerCount",getter:"net_peerCount",outputFormatter:n.toDecimal}];e.exports={methods:r,properties:o}},{"../utils/utils":5}],16:[function(t,e){var n=function(){};n.prototype.send=function(t){var e=navigator.qt.callMethod(JSON.stringify(t));return JSON.parse(e)},e.exports=n},{}],17:[function(t,e){var n=t("./jsonrpc"),r=t("../utils/config"),o=function(){var t,e=[],o=null,a=function(e,r){"function"==typeof e.inputFormatter?e.params=Array.prototype.map.call(e.params,function(t,n){return!e.addDefaultblock||n+1<e.addDefaultblock?e.inputFormatter(t):t}):e.inputFormatter instanceof Array&&(e.params=Array.prototype.map.call(e.inputFormatter,function(t,n){return!e.addDefaultblock||n+1<e.addDefaultblock?t(e.params[n]):e.params[n]}));var o=n.toPayload(e.method,e.params);if(!t)return console.error("provider is not set"),null;if("function"!=typeof r||"HTTP"!==t.name){var a=t.send(o);return n.isValidResponse(a)?"function"==typeof e.outputFormatter?e.outputFormatter(a.result):a.result:(console.log(a),"object"==typeof a&&a.error&&a.error.message&&console.error(a.error.message),null)}t.send(o,function(t,o){return n.isValidResponse(t)?void r(null,"function"==typeof e.outputFormatter?e.outputFormatter(t.result):t.result):("object"==typeof t&&t.error&&t.error.message?(console.error(t.error.message),r(t.error)):r(new Error({status:o,error:t,message:"Bad Request"})),null)})},i=function(e){t=e},u=function(t,n,r,o){e.push({data:t,id:n,callback:r,uninstall:o})},s=function(t){for(var n=e.length;n--;){var r=e[n];r.id===t&&e.splice(n,1)}},c=function(){e.forEach(function(t){t.uninstall(t.id)}),e=[],o&&(clearTimeout(o),o=null),l()},l=function(){e.forEach(function(t){a(t.data,function(e,n){n instanceof Array&&0!==n.length&&t.callback(n)})}),o=setTimeout(l,r.ETH_POLLING_TIMEOUT)};return l(),{send:a,setProvider:i,startPolling:u,stopPolling:s,reset:c}};e.exports=o},{"../utils/config":4,"./jsonrpc":14}],18:[function(t,e){var n=t("./formatters"),r=function(){return[{name:"post",call:"shh_post",inputFormatter:n.inputPostFormatter},{name:"newIdentity",call:"shh_newIdentity"},{name:"hasIdentity",call:"shh_hasIdentity"},{name:"newGroup",call:"shh_newGroup"},{name:"addToGroup",call:"shh_addToGroup"},{name:"haveIdentity",call:"shh_haveIdentity",newMethod:"shh.hasIdentity"}]};e.exports={methods:r}},{"./formatters":12}],19:[function(t,e){var n=t("../web3"),r=t("../utils/config"),o=function(t){return n.sha3(n.fromAscii(t)).slice(0,2+2*r.ETH_SIGNATURE_LENGTH)},a=function(t){return n.sha3(n.fromAscii(t))};e.exports={functionSignatureFromAscii:o,eventSignatureFromAscii:a}},{"../utils/config":4,"../web3":6}],20:[function(t,e){var n=function(){var t=function(t){return"string"==typeof t[0]?"eth_newBlockFilter":"eth_newFilter"};return[{name:"newFilter",call:t},{name:"uninstallFilter",call:"eth_uninstallFilter"},{name:"getLogs",call:"eth_getFilterLogs"}]},r=function(){return[{name:"newFilter",call:"shh_newFilter"},{name:"uninstallFilter",call:"shh_uninstallFilter"},{name:"getLogs",call:"shh_getMessages"}]};e.exports={eth:n,shh:r}},{}],web3:[function(t,e){var n=t("./lib/web3");n.providers.HttpProvider=t("./lib/web3/httpprovider"),n.providers.QtSyncProvider=t("./lib/web3/qtsync"),n.eth.contract=t("./lib/web3/contract"),n.abi=t("./lib/solidity/abi"),e.exports=n},{"./lib/solidity/abi":1,"./lib/web3":6,"./lib/web3/contract":7,"./lib/web3/httpprovider":13,"./lib/web3/qtsync":16}]},{},["web3"]);`
diff --git a/jsre/jsre.go b/jsre/jsre.go
new file mode 100644
index 000000000..7ae5be742
--- /dev/null
+++ b/jsre/jsre.go
@@ -0,0 +1,115 @@
+package jsre
+
+import (
+	"fmt"
+	"github.com/obscuren/otto"
+	"io/ioutil"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+/*
+JSRE is a generic JS runtime environment embedding the otto JS interpreter.
+It provides some helper functions to
+- load code from files
+- run code snippets
+- require libraries
+- bind native go objects
+*/
+type JSRE struct {
+	assetPath string
+	vm        *otto.Otto
+}
+
+func New(assetPath string) *JSRE {
+	re := &JSRE{
+		assetPath,
+		otto.New(),
+	}
+
+	// load prettyprint func definition
+	re.vm.Run(pp_js)
+	re.vm.Set("loadScript", re.loadScript)
+
+	return re
+}
+
+// Exec(file) loads and runs the contents of a file
+// if a relative path is given, the jsre's assetPath is used
+func (self *JSRE) Exec(file string) error {
+	return self.exec(ethutil.AbsolutePath(self.assetPath, file))
+}
+
+func (self *JSRE) exec(path string) error {
+	code, err := ioutil.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	_, err = self.vm.Run(code)
+	return err
+}
+
+func (self *JSRE) Bind(name string, v interface{}) (err error) {
+	self.vm.Set(name, v)
+	return
+}
+
+func (self *JSRE) Run(code string) (otto.Value, error) {
+	return self.vm.Run(code)
+}
+
+func (self *JSRE) Get(ns string) (otto.Value, error) {
+	return self.vm.Get(ns)
+}
+
+func (self *JSRE) Set(ns string, v interface{}) error {
+	return self.vm.Set(ns, v)
+}
+
+func (self *JSRE) loadScript(call otto.FunctionCall) otto.Value {
+	file, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.FalseValue()
+	}
+	if err := self.Exec(file); err != nil {
+		fmt.Println("err:", err)
+		return otto.FalseValue()
+	}
+
+	return otto.TrueValue()
+}
+
+func (self *JSRE) PrettyPrint(v interface{}) (val otto.Value, err error) {
+	var method otto.Value
+	v, err = self.vm.ToValue(v)
+	if err != nil {
+		return
+	}
+	method, err = self.vm.Get("prettyPrint")
+	if err != nil {
+		return
+	}
+	return method.Call(method, v)
+}
+
+func (self *JSRE) ToVal(v interface{}) otto.Value {
+	result, err := self.vm.ToValue(v)
+	if err != nil {
+		fmt.Println("Value unknown:", err)
+		return otto.UndefinedValue()
+	}
+	return result
+}
+
+func (self *JSRE) Eval(code string) (s string, err error) {
+	var val otto.Value
+	val, err = self.Run(code)
+	if err != nil {
+		return
+	}
+	val, err = self.PrettyPrint(val)
+	if err != nil {
+		return
+	}
+	return fmt.Sprintf("%v", val), nil
+}
diff --git a/jsre/jsre_test.go b/jsre/jsre_test.go
new file mode 100644
index 000000000..67b5ea906
--- /dev/null
+++ b/jsre/jsre_test.go
@@ -0,0 +1,85 @@
+package jsre
+
+import (
+	"github.com/obscuren/otto"
+	"os"
+	"path"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+var defaultAssetPath = path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist", "assets", "ext")
+
+type testNativeObjectBinding struct {
+	toVal func(interface{}) otto.Value
+}
+
+type msg struct {
+	Msg string
+}
+
+func (no *testNativeObjectBinding) TestMethod(call otto.FunctionCall) otto.Value {
+	m, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.UndefinedValue()
+	}
+	return no.toVal(&msg{m})
+}
+
+func TestExec(t *testing.T) {
+	jsre := New("/tmp")
+
+	ethutil.WriteFile("/tmp/test.js", []byte(`msg = "testMsg"`))
+	err := jsre.Exec("test.js")
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+	val, err := jsre.Run("msg")
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+	if !val.IsString() {
+		t.Errorf("expected string value, got %v", val)
+	}
+
+	// this errors
+	err = jsre.Exec(path.Join(defaultAssetPath, "bignumber.min.js"))
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+	_, err = jsre.Run("x = new BigNumber(123.4567);")
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+}
+
+func TestBind(t *testing.T) {
+	jsre := New(defaultAssetPath)
+
+	jsre.Bind("no", &testNativeObjectBinding{jsre.ToVal})
+
+	val, err := jsre.Run(`no.testMethod("testMsg")`)
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+	pp, err := jsre.PrettyPrint(val)
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+	t.Logf("no: %v", pp)
+}
+
+func TestRequire(t *testing.T) {
+	jsre := New(defaultAssetPath)
+
+	_, err := jsre.Run("x = new BigNumber(123.4567);")
+	if err == nil {
+		t.Errorf("expected error, got nothing")
+	}
+	_, err = jsre.Run(`loadScript("bignumber.min.js"); x = new BigNumber(123.4567)`)
+	if err != nil {
+		t.Errorf("expected no error, got %v", err)
+	}
+
+}
diff --git a/jsre/pp_js.go b/jsre/pp_js.go
new file mode 100644
index 000000000..fd80ae68b
--- /dev/null
+++ b/jsre/pp_js.go
@@ -0,0 +1,55 @@
+package jsre
+
+const pp_js = `
+function pp(object) {
+    var str = "";
+
+    if(object instanceof Array) {
+        str += "[ ";
+        for(var i = 0, l = object.length; i < l; i++) {
+            str += pp(object[i]);
+
+            if(i < l-1) {
+                str += ", ";
+            }
+        }
+        str += " ]";
+    } else if(typeof(object) === "object") {
+        str += "{ ";
+        var last = Object.keys(object).pop()
+        for(var k in object) {
+            str += k + ": " + pp(object[k]);
+
+            if(k !== last) {
+                str += ", ";
+            }
+        }
+        str += " }";
+    } else if(typeof(object) === "string") {
+        str += "\033[32m'" + object + "'";
+    } else if(typeof(object) === "undefined") {
+        str += "\033[1m\033[30m" + object;
+    } else if(typeof(object) === "number") {
+        str += "\033[31m" + object;
+    } else if(typeof(object) === "function") {
+	str += "\033[35m[Function]";
+    } else {
+        str += object;
+    }
+
+    str += "\033[0m";
+
+    return str;
+}
+
+function prettyPrint(/* */) {
+    var args = arguments;
+    var ret = "";
+    for(var i = 0, l = args.length; i < l; i++) {
+	    ret += pp(args[i]) + "\n";
+    }
+    return ret;
+}
+
+var print = prettyPrint;
+`