From b5234413611ce5984292f85a01de1f56c045b490 Mon Sep 17 00:00:00 2001 From: obscuren Date: Mon, 16 Mar 2015 11:27:38 +0100 Subject: Moved ethutil => common --- common/natspec/natspec.go | 63 +++++++++++++++++++++++++++ common/natspec/natspec_js.go | 4 ++ common/natspec/natspec_test.go | 97 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 164 insertions(+) create mode 100644 common/natspec/natspec.go create mode 100644 common/natspec/natspec_js.go create mode 100644 common/natspec/natspec_test.go (limited to 'common/natspec') diff --git a/common/natspec/natspec.go b/common/natspec/natspec.go new file mode 100644 index 000000000..793bf59ae --- /dev/null +++ b/common/natspec/natspec.go @@ -0,0 +1,63 @@ +package natspec + +import ( + "fmt" + "github.com/obscuren/otto" +) + +type NatSpec struct { + jsvm *otto.Otto +} + +// TODO: should initialise with abi and userdoc jsons +func New() (self *NatSpec, err error) { + + self = new(NatSpec) + self.jsvm = otto.New() + + _, err = self.jsvm.Run(natspecJS) + if err != nil { + return + } + _, err = self.jsvm.Run("var natspec = require('natspec');") + if err != nil { + return + } + + return +} + +func (self *NatSpec) Notice(transaction, abi, method, expression string) (string, error) { + var err error + if _, err = self.jsvm.Run("var transaction = " + transaction + ";"); err != nil { + return "", fmt.Errorf("natspec.js error setting transaction: %v", err) + } + + if _, err = self.jsvm.Run("var abi = " + abi + ";"); err != nil { + return "", fmt.Errorf("natspec.js error setting abi: %v", err) + } + + if _, err = self.jsvm.Run("var method = '" + method + "';"); err != nil { + return "", fmt.Errorf("natspec.js error setting method: %v", err) + } + + if _, err = self.jsvm.Run("var expression = \"" + expression + "\";"); err != nil { + return "", fmt.Errorf("natspec.js error setting expression: %v", err) + } + + self.jsvm.Run("var call = {method: method,abi: abi,transaction: transaction};") + value, err := self.jsvm.Run("natspec.evaluateExpression(expression, call);") + if err != nil { + return "", fmt.Errorf("natspec.js error evaluating expression: %v", err) + } + evalError := "Natspec evaluation failed, wrong input params" + if value.String() == evalError { + return "", fmt.Errorf("natspec.js error evaluating expression: wrong input params in expression '%s'", expression) + } + if len(value.String()) == 0 { + return "", fmt.Errorf("natspec.js error evaluating expression") + } + + return value.String(), nil + +} diff --git a/common/natspec/natspec_js.go b/common/natspec/natspec_js.go new file mode 100644 index 000000000..96d8204fb --- /dev/null +++ b/common/natspec/natspec_js.go @@ -0,0 +1,4 @@ +package natspec + +const natspecJS = `require=function t(e,n,r){function i(f,u){if(!n[f]){if(!e[f]){var s="function"==typeof require&&require;if(!u&&s)return s(f,!0);if(o)return o(f,!0);var c=new Error("Cannot find module '"+f+"'");throw c.code="MODULE_NOT_FOUND",c}var 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p},u=function(t,e){try{return f(t,e)}catch(n){return n.message}};return{evaluateExpression:f,evaluateExpressionSafe:u}}();e.exports=r},{"./node_modules/ethereum.js/lib/abi.js":3}]},{},[]); +//# sourceMappingURL=natspec.js.map` diff --git a/common/natspec/natspec_test.go b/common/natspec/natspec_test.go new file mode 100644 index 000000000..330dc831d --- /dev/null +++ b/common/natspec/natspec_test.go @@ -0,0 +1,97 @@ +package natspec + +import ( + "testing" +) + +func TestNotice(t *testing.T) { + + tx := ` + { + "jsonrpc": "2.0", + "method": "eth_call", + "params": [{ + "to": "0x8521742d3f456bd237e312d6e30724960f72517a", + "data": "0xc6888fa1000000000000000000000000000000000000000000000000000000000000007a" + }], + "id": 6 + } + ` + + abi := ` + [{ + "name": "multiply", + "constant": false, + "type": "function", + "inputs": [{ + "name": "a", + "type": "uint256" + }], + "outputs": [{ + "name": "d", + "type": "uint256" + }] + }] + ` + + desc := "Will multiply `a` by 7 and return `a * 7`." + + method := "multiply" + + ns, err := New() + if err != nil { + t.Errorf("NewNATSpec error %v", err) + } + + notice, err := ns.Notice(tx, abi, method, desc) + + if err != nil { + t.Errorf("expected no error got %v", err) + } + + expected := "Will multiply 122 by 7 and return 854." + if notice != expected { + t.Errorf("incorrect notice. expected %v, got %v", expected, notice) + } else { + t.Logf("returned notice \"%v\"", notice) + } + + notice, err = ns.Notice(tx, abi, method, "Will multiply 122 by \"7\" and return 854.") + + expected = "natspec.js error setting expression: (anonymous): Line 1:41 Unexpected number" + + if err == nil { + t.Errorf("expected error, got nothing (notice: '%v')", err, notice) + } else { + if err.Error() != expected { + t.Errorf("expected error '%s' got '%v' (notice: '%v')", expected, err, notice) + } + } + + // https://github.com/ethereum/natspec.js/issues/1 + badDesc := "Will multiply `e` by 7 and return `a * 7`." + notice, err = ns.Notice(tx, abi, method, badDesc) + + expected = "natspec.js error evaluating expression: Error: Natspec evaluation failed, wrong input params" + + if err == nil { + t.Errorf("expected error, got nothing (notice: '%v')", notice) + } else { + if err.Error() != expected { + t.Errorf("expected error '%s' got '%v' (notice: '%v')", expected, err, notice) + } + } + + notice, err = ns.Notice(tx, abi, "missing_method", desc) + + expected = "natspec.js error evaluating expression: Error: Natspec evaluation failed, method does not exist" + + if err == nil { + t.Errorf("expected error, got nothing (notice: '%v')", notice) + } else { + if err.Error() != expected { + t.Errorf("expected error '%s' got '%v' (notice: '%v')", expected, err, notice) + } + } + +} -- cgit