Prepare for creating wasm builds

.gitignore

@@ -3,9 +3,13 @@ gopherjs-tool.exe
 gopherjs-tool
 skycoin.js
 skycoin.js.map
+test.wasm
 
 # dependencies
 /node_modules
+/js/node_modules
+/js/package-lock.json
 
 # temp files
-/coverage
+/coverage
+/js/coverage

.travis.yml

@@ -8,7 +8,7 @@ go:
 install:
   - if [[ ! -d $GOPATH/src/github.com/skycoin/skycoin-lite ]]; then mkdir -p $GOPATH/src/github.com/skycoin; ln -s $TRAVIS_BUILD_DIR $GOPATH/src/github.com/skycoin/skycoin-lite; fi
   - cd $GOPATH/src/github.com/skycoin/skycoin-lite
-  - go get -t ./...
+  - GOOS=js GOARCH=wasm go get -t ./...
   - go get -u github.com/FiloSottile/vendorcheck
   # Install pinned golangci-lint, overriding the latest version install by make install-linters
   - VERSION=1.17.1 ./ci-scripts/install-golangci-lint.sh
@@ -17,8 +17,8 @@ install:
 script:
   - cd $GOPATH/src/github.com/skycoin/skycoin-lite
   - make check
-  - make build-js-min
-  - make test-suite-ts
+  - make build-wasm
+  - make test-suite-ts-wasm
 
 notifications:
   email:

Gopkg.toml

@@ -24,12 +24,15 @@
 #   go-tests = true
 #   unused-packages = true
 
-required = ["github.com/gopherjs/gopherjs"]
+required = ["github.com/gopherjs/gopherjs", "github.com/stretchr/testify/require"]
 
 [[constraint]]
   branch = "develop"
   name = "github.com/skycoin/skycoin"
 
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  revision = "2aa2c176b9dab406a6970f6a55f513e8a8c8b18f"
+
 [prune]
-  go-tests = true
   unused-packages = true

Makefile

@@ -14,24 +14,37 @@ build-js-min: ## Build /skycoin/skycoin.go. The result is minified and saved in
 	go build -o gopherjs-tool vendor/github.com/gopherjs/gopherjs/tool.go
 	GOOS=linux ./gopherjs-tool build skycoin/skycoin.go -m -o js/skycoin.js
 
+build-wasm: ## Build /wasm/skycoin.go. The result is saved in the repo root as skycoin-lite.wasm
+	GOOS=js GOARCH=wasm go build -o js/skycoin-lite.wasm ./wasm/skycoin.go
+
 test-js: ## Run the Go tests using JavaScript
 	go build -o gopherjs-tool vendor/github.com/gopherjs/gopherjs/tool.go
 	./gopherjs-tool test ./skycoin/ -v
 
-test-suite-ts: ## Run the ts version of the cipher test suite. Use a small number of test cases
+test-suite-ts: ## Run the ts version of the cipher test suite for GopherJS. Use a small number of test cases
 	cd js && npm run test
 
-test-suite-ts-extensive: ## Run the ts version of the cipher test suite. All the test cases
+test-suite-ts-extensive: ## Run the ts version of the cipher test suite for GopherJS. All the test cases
 	cd js && npm run test-extensive
 
+test-suite-ts-wasm: ## Run the ts version of the cipher test suite for wasm and additional tests
+	cd vendor/github.com/skycoin/skycoin/src/cipher && GOOS=js GOARCH=wasm go test -c -o test.wasm
+	cd vendor/github.com/skycoin/skycoin/src/cipher/secp256k1-go && GOOS=js GOARCH=wasm go test -c -o test.wasm
+	cd vendor/github.com/skycoin/skycoin/src/cipher/secp256k1-go/secp256k1-go2 && GOOS=js GOARCH=wasm go test -c -o test.wasm
+	cd js && npm run test-wasm
+	cd js/tests && node cipher-wasm-internal.js
+	cd vendor/github.com/skycoin/skycoin/src/cipher && rm test.wasm
+	cd vendor/github.com/skycoin/skycoin/src/cipher/secp256k1-go && rm test.wasm
+	cd vendor/github.com/skycoin/skycoin/src/cipher/secp256k1-go/secp256k1-go2 && rm test.wasm
+
 test:
 	go test ./... -timeout=10m -cover
 
 lint: ## Run linters. Use make install-linters first.
 	vendorcheck ./...
-	golangci-lint run -c ./.golangci.yml ./...
+	GOOS=js GOARCH=wasm golangci-lint run -c ./.golangci.yml ./...
 	@# The govet version in golangci-lint is out of date and has spurious warnings, run it separately
-	go vet -all ./...
+	GOOS=js GOARCH=wasm go vet -all ./...
 
 check: lint test ## Run tests and linters
 

README.md

@@ -2,13 +2,14 @@
 
 # Skycoin Liteclient
 
-This repository contains a small wrapper for Skycoin (written in Go) to provide mobile and JS bindings.
+This repository contains a small wrapper for Skycoin (written in Go) to provide mobile, JS and wasm bindings.
 
 At the moment it is used to compile
 an [Android Archive](https://developer.android.com/studio/projects/android-library.html), an iOS Framework,
-and a JS library with [gopherjs](https://github.com/gopherjs/gopherjs).
+a (deprecated) JS library with [gopherjs](https://github.com/gopherjs/gopherjs) and a wasm file.
 
-Supports go1.10+.
+Supports go1.10+. However, for compiling the wasm file you must use Go v1.12.x (compatibility
+with Go v1.13+ is not guaranteed).
 
 ## Important note about error handling
 
@@ -31,15 +32,26 @@ $ gomobile bind -target=ios github.com/skycoin/skycoin-lite/mobile
 
 ## Compile javascript library
 
+> IMPORTANT: the ability for transpiling the code to a JavaScript library is deprecated due to important
+performance issues and should not be used. Please compile to a wasm file instead.
+
 For the compilation process to javascript library, we use [gopherjs](https://github.com/gopherjs/gopherjs).
 
 To compile the library use `make build-js` or `make build-js-min` (if you want the final file to be minified).
-After compiling, the main.js and main.js.map files will be created/updated in the root of the repository.
+After compiling, the `skycoin.js` and `skycoin.js.map` files will be created/updated in the `js` folder.
+
+## Compile wasm file
+
+> IMPORTANT: you need Go v1.12.x to use this function. It is not guaranteed to work with Go v1.13+.
+
+To compile the wasm file use `make build-wasm`. After compiling, the `skycoin-lite.wasm` file will be
+created/updated in the `js` folder.
 
 ## Development
 
-The javascript library is created starting from [gopher/main.go](gopher/main.go). The Android/iOS library is
-created starting from [mobile/api.go](mobile/api.go).
+The javascript library is created starting from [skycoin/skycoin.go](skycoin/skycoin.go). The wasm file is
+created starting from [wasm/skycoin.go](wasm/skycoin.go). The Android/iOS library is created starting
+from [mobile/api.go](mobile/api.go).
 
 ### Running tests
 
@@ -66,22 +78,37 @@ npm install --global source-map-support
 
 and make sure `NODE_PATH` is set to the value of `npm root --global` in your environment.
 
-#### TS cipher test suite
+#### TS cipher test suite for GopherJS
+
+> IMPORTANT: the ability for transpiling the code to a JavaScript library is deprecated due to important
+performance issues and should not be used. Please compile to a wasm file instead.
 
 The repository includes a TypeScript version of the cipher test suite, originally written in Go in
-the Skycoin main repository. Because the tests take a significant amount of time to complete in
-JavaScript/TypeScript, the test suite can be run with a limited number of cases with
+the Skycoin main repository. It test the GopherJS version of the library, so before
+using it you must compile the GopherJS version with `make build-js` or `make build-js-min`.
+Because testing the GopherJS version takes a significant amount of time to complete, the test suite
+can be run with a limited number of cases with:
 
 ```sh
 make test-suite-ts
 ```
 
-The test suite can be run with all test cases using
+The test suite can be run with all test cases using:
 
 ```sh
 make test-suite-ts-extensive
 ```
 
+#### TS cipher test suite for wasm
+
+There is test suite for the wasm version of the library, just like there is one for the GopherJS
+version. Before using it you must compile the wasm version with `make build-wasm`. The test suite
+can be run with:
+
+```sh
+make test-suite-ts-wasm
+```
+
 ### Formatting
 
 All `.go` source files should be formatted `goimports`.  You can do this with:

js/karma.conf.js → js/karma-gopher.conf.js

@@ -20,9 +20,9 @@ module.exports = function (config) {
       require('karma-typescript')
     ],
     files: [
-      'tests/*.spec.ts',
+      'tests/cipher.spec.ts',
       { pattern: 'tests/test-fixtures/*.golden', included: false },
-      { pattern: 'tests/*.ts', included: true },
+      { pattern: 'tests/utils.ts', included: true },
       { pattern: 'skycoin.js', included: true }
     ],
     preprocessors: {