mobile: initial wrappers for mobile support

.travis.yml

@@ -62,6 +62,21 @@ matrix:
         - go run build/ci.go install
         - go run build/ci.go archive -type tar -signer OSX_SIGNING_KEY -upload gethstore/builds
 
+    # This builder does the mobile builds (and nothing else)
+    - os: osx
+      go: 1.7
+      script:
+        - brew update
+        - brew install android-sdk
+        - export ANDROID_HOME=/usr/local/opt/android-sdk
+        - echo "y" | android update sdk --no-ui --filter platform
+        - go get github.com/tools/godep
+        - godep restore
+        - go get golang.org/x/mobile/cmd/gomobile
+        - gomobile init
+        - gomobile bind --target=android --javapkg=org.ethereum -v github.com/ethereum/go-ethereum/mobile
+        - gomobile bind --target=ios --tags=ios -v github.com/ethereum/go-ethereum/mobile
+
 install:
   - go get golang.org/x/tools/cmd/cover
 script:

accounts/abi/bind/bind.go

@@ -32,11 +32,20 @@ import (
 	"golang.org/x/tools/imports"
 )
 
+// Lang is a target programming language selector to generate bindings for.
+type Lang int
+
+const (
+	LangGo Lang = iota
+	LangJava
+	LangObjC
+)
+
 // Bind generates a Go wrapper around a contract ABI. This wrapper isn't meant
 // to be used as is in client code, but rather as an intermediate struct which
 // enforces compile time type safety and naming convention opposed to having to
 // manually maintain hard coded strings that break on runtime.
-func Bind(types []string, abis []string, bytecodes []string, pkg string) (string, error) {
+func Bind(types []string, abis []string, bytecodes []string, pkg string, lang Lang) (string, error) {
 	// Process each individual contract requested binding
 	contracts := make(map[string]*tmplContract)
 
@@ -62,7 +71,7 @@ func Bind(types []string, abis []string, bytecodes []string, pkg string) (string
 		for _, original := range evmABI.Methods {
 			// Normalize the method for capital cases and non-anonymous inputs/outputs
 			normalized := original
-			normalized.Name = capitalise(original.Name)
+			normalized.Name = methodNormalizer[lang](original.Name)
 
 			normalized.Inputs = make([]abi.Argument, len(original.Inputs))
 			copy(normalized.Inputs, original.Inputs)
@@ -78,7 +87,7 @@ func Bind(types []string, abis []string, bytecodes []string, pkg string) (string
 					normalized.Outputs[j].Name = capitalise(output.Name)
 				}
 			}
-			// Append the methos to the call or transact lists
+			// Append the methods to the call or transact lists
 			if original.Const {
 				calls[original.Name] = &tmplMethod{Original: original, Normalized: normalized, Structured: structured(original)}
 			} else {
@@ -87,7 +96,7 @@ func Bind(types []string, abis []string, bytecodes []string, pkg string) (string
 		}
 		contracts[types[i]] = &tmplContract{
 			Type:        capitalise(types[i]),
-			InputABI:    strippedABI,
+			InputABI:    strings.Replace(strippedABI, "\"", "\\\"", -1),
 			InputBin:    strings.TrimSpace(bytecodes[i]),
 			Constructor: evmABI.Constructor,
 			Calls:       calls,
@@ -102,9 +111,12 @@ func Bind(types []string, abis []string, bytecodes []string, pkg string) (string
 	buffer := new(bytes.Buffer)
 
 	funcs := map[string]interface{}{
-		"bindtype": bindType,
+		"bindtype":     bindType[lang],
+		"namedtype":    namedType[lang],
+		"capitalise":   capitalise,
+		"decapitalise": decapitalise,
 	}
-	tmpl := template.Must(template.New("").Funcs(funcs).Parse(tmplSource))
+	tmpl := template.Must(template.New("").Funcs(funcs).Parse(tmplSource[lang]))
 	if err := tmpl.Execute(buffer, data); err != nil {
 		return "", err
 	}
@@ -116,10 +128,17 @@ func Bind(types []string, abis []string, bytecodes []string, pkg string) (string
 	return string(code), nil
 }
 
-// bindType converts a Solidity type to a Go one. Since there is no clear mapping
+// bindType is a set of type binders that convert Solidity types to some supported
+// programming language.
+var bindType = map[Lang]func(kind abi.Type) string{
+	LangGo:   bindTypeGo,
+	LangJava: bindTypeJava,
+}
+
+// bindTypeGo converts a Solidity type to a Go one. Since there is no clear mapping
 // from all Solidity types to Go ones (e.g. uint17), those that cannot be exactly
 // mapped will use an upscaled type (e.g. *big.Int).
-func bindType(kind abi.Type) string {
+func bindTypeGo(kind abi.Type) string {
 	stringKind := kind.String()
 
 	switch {
@@ -160,11 +179,137 @@ func bindType(kind abi.Type) string {
 	}
 }
 
+// bindTypeJava converts a Solidity type to a Java one. Since there is no clear mapping
+// from all Solidity types to Java ones (e.g. uint17), those that cannot be exactly
+// mapped will use an upscaled type (e.g. BigDecimal).
+func bindTypeJava(kind abi.Type) string {
+	stringKind := kind.String()
+
+	switch {
+	case strings.HasPrefix(stringKind, "address"):
+		parts := regexp.MustCompile("address(\\[[0-9]*\\])?").FindStringSubmatch(stringKind)
+		if len(parts) != 2 {
+			return stringKind
+		}
+		if parts[1] == "" {
+			return fmt.Sprintf("Address")
+		}
+		return fmt.Sprintf("Addresses")
+
+	case strings.HasPrefix(stringKind, "bytes"):
+		parts := regexp.MustCompile("bytes([0-9]*)(\\[[0-9]*\\])?").FindStringSubmatch(stringKind)
+		if len(parts) != 3 {
+			return stringKind
+		}
+		if parts[2] != "" {
+			return "byte[][]"
+		}
+		return "byte[]"
+
+	case strings.HasPrefix(stringKind, "int") || strings.HasPrefix(stringKind, "uint"):
+		parts := regexp.MustCompile("(u)?int([0-9]*)(\\[[0-9]*\\])?").FindStringSubmatch(stringKind)
+		if len(parts) != 4 {
+			return stringKind
+		}
+		switch parts[2] {
+		case "8", "16", "32", "64":
+			if parts[1] == "" {
+				if parts[3] == "" {
+					return fmt.Sprintf("int%s", parts[2])
+				}
+				return fmt.Sprintf("int%s[]", parts[2])
+			}
+		}
+		if parts[3] == "" {
+			return fmt.Sprintf("BigInt")
+		}
+		return fmt.Sprintf("BigInts")
+
+	case strings.HasPrefix(stringKind, "bool"):
+		parts := regexp.MustCompile("bool(\\[[0-9]*\\])?").FindStringSubmatch(stringKind)
+		if len(parts) != 2 {
+			return stringKind
+		}
+		if parts[1] == "" {
+			return fmt.Sprintf("bool")
+		}
+		return fmt.Sprintf("bool[]")
+
+	case strings.HasPrefix(stringKind, "string"):
+		parts := regexp.MustCompile("string(\\[[0-9]*\\])?").FindStringSubmatch(stringKind)
+		if len(parts) != 2 {
+			return stringKind
+		}
+		if parts[1] == "" {
+			return fmt.Sprintf("String")
+		}
+		return fmt.Sprintf("String[]")
+
+	default:
+		return stringKind
+	}
+}
+
+// namedType is a set of functions that transform language specific types to
+// named versions that my be used inside method names.
+var namedType = map[Lang]func(string, abi.Type) string{
+	LangGo:   func(string, abi.Type) string { panic("this shouldn't be needed") },
+	LangJava: namedTypeJava,
+}
+
+// namedTypeJava converts some primitive data types to named variants that can
+// be used as parts of method names.
+func namedTypeJava(javaKind string, solKind abi.Type) string {
+	switch javaKind {
+	case "byte[]":
+		return "Binary"
+	case "byte[][]":
+		return "Binaries"
+	case "string":
+		return "String"
+	case "string[]":
+		return "Strings"
+	case "bool":
+		return "Bool"
+	case "bool[]":
+		return "Bools"
+	case "BigInt":
+		parts := regexp.MustCompile("(u)?int([0-9]*)(\\[[0-9]*\\])?").FindStringSubmatch(solKind.String())
+		if len(parts) != 4 {
+			return javaKind
+		}
+		switch parts[2] {
+		case "8", "16", "32", "64":
+			if parts[3] == "" {
+				return capitalise(fmt.Sprintf("%sint%s", parts[1], parts[2]))
+			}
+			return capitalise(fmt.Sprintf("%sint%ss", parts[1], parts[2]))
+
+		default:
+			return javaKind
+		}
+	default:
+		return javaKind
+	}
+}
+
+// methodNormalizer is a name transformer that modifies Solidity method names to
+// conform to target language naming concentions.
+var methodNormalizer = map[Lang]func(string) string{
+	LangGo:   capitalise,
+	LangJava: decapitalise,
+}
+
 // capitalise makes the first character of a string upper case.
 func capitalise(input string) string {
 	return strings.ToUpper(input[:1]) + input[1:]
 }
 
+// decapitalise makes the first character of a string lower case.
+func decapitalise(input string) string {
+	return strings.ToLower(input[:1]) + input[1:]
+}
+
 // structured checks whether a method has enough information to return a proper
 // Go struct ot if flat returns are needed.
 func structured(method abi.Method) bool {

accounts/abi/bind/bind_test.go

@@ -398,7 +398,7 @@ func TestBindings(t *testing.T) {
 	// Generate the test suite for all the contracts
 	for i, tt := range bindTests {
 		// Generate the binding and create a Go source file in the workspace
-		bind, err := Bind([]string{tt.name}, []string{tt.abi}, []string{tt.bytecode}, "bindtest")
+		bind, err := Bind([]string{tt.name}, []string{tt.abi}, []string{tt.bytecode}, "bindtest", LangGo)
 		if err != nil {
 			t.Fatalf("test %d: failed to generate binding: %v", i, err)
 		}

accounts/abi/bind/template.go

@@ -42,9 +42,16 @@ type tmplMethod struct {
 	Structured bool       // Whether the returns should be accumulated into a contract
 }
 
-// tmplSource is the Go source template use to generate the contract binding
+// tmplSource is language to template mapping containing all the supported
+// programming languages the package can generate to.
+var tmplSource = map[Lang]string{
+	LangGo:   tmplSourceGo,
+	LangJava: tmplSourceJava,
+}
+
+// tmplSourceGo is the Go source template use to generate the contract binding
 // based on.
-const tmplSource = `
+const tmplSourceGo = `
 // This file is an automatically generated Go binding. Do not modify as any
 // change will likely be lost upon the next re-generation!
 
@@ -52,7 +59,7 @@ package {{.Package}}
 
 {{range $contract := .Contracts}}
 	// {{.Type}}ABI is the input ABI used to generate the binding from.
-	const {{.Type}}ABI = ` + "`" + `{{.InputABI}}` + "`" + `
+	const {{.Type}}ABI = "{{.InputABI}}"
 
 	{{if .InputBin}}
 		// {{.Type}}Bin is the compiled bytecode used for deploying new contracts.
@@ -258,3 +265,105 @@ package {{.Package}}
 	{{end}}
 {{end}}
 `
+
+// tmplSourceJava is the Java source template use to generate the contract binding
+// based on.
+const tmplSourceJava = `
+// This file is an automatically generated Java binding. Do not modify as any
+// change will likely be lost upon the next re-generation!
+
+package {{.Package}};
+
+import org.ethereum.geth.*;
+import org.ethereum.geth.internal.*;
+
+{{range $contract := .Contracts}}
+	public class {{.Type}} {
+		// ABI is the input ABI used to generate the binding from.
+		public final static String ABI = "{{.InputABI}}";
+
+		{{if .InputBin}}
+			// Bytecode is the compiled bytecode used for deploying new contracts.
+			public final static byte[] Bytecode = "{{.InputBin}}".getBytes();
+
+			// deploy deploys a new Ethereum contract, binding an instance of {{.Type}} to it.
+			public static {{.Type}} deploy(TransactOpts auth, EthereumClient client{{range .Constructor.Inputs}}, {{bindtype .Type}} {{.Name}}{{end}}) throws Exception {
+				Interfaces args = Geth.newInterfaces({{(len .Constructor.Inputs)}});
+				{{range $index, $element := .Constructor.Inputs}}
+				  args.set({{$index}}, Geth.newInterface()); args.get({{$index}}).set{{namedtype (bindtype .Type) .Type}}({{.Name}});
+				{{end}}
+				return new {{.Type}}(Geth.deployContract(auth, ABI, Bytecode, client, args));
+			}
+
+			// Internal constructor used by contract deployment.
+			private {{.Type}}(BoundContract deployment) {
+				this.Address  = deployment.getAddress();
+				this.Deployer = deployment.getDeployer();
+				this.Contract = deployment;
+			}
+		{{end}}
+
+		// Ethereum address where this contract is located at.
+		public final Address Address;
+
+		// Ethereum transaction in which this contract was deployed (if known!).
+		public final Transaction Deployer;
+
+		// Contract instance bound to a blockchain address.
+		private final BoundContract Contract;
+
+		// Creates a new instance of {{.Type}}, bound to a specific deployed contract.
+		public {{.Type}}(Address address, EthereumClient client) throws Exception {
+			this(Geth.bindContract(address, ABI, client));
+		}
+
+		{{range .Calls}}
+			{{if gt (len .Normalized.Outputs) 1}}
+			// {{capitalise .Normalized.Name}}Results is the output of a call to {{.Normalized.Name}}.
+			public class {{capitalise .Normalized.Name}}Results {
+				{{range $index, $item := .Normalized.Outputs}}public {{bindtype .Type}} {{if ne .Name ""}}{{.Name}}{{else}}Return{{$index}}{{end}};
+				{{end}}
+			}
+			{{end}}
+
+			// {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}.
+			//
+			// Solidity: {{.Original.String}}
+			public {{if gt (len .Normalized.Outputs) 1}}{{capitalise .Normalized.Name}}Results{{else}}{{range .Normalized.Outputs}}{{bindtype .Type}}{{end}}{{end}} {{.Normalized.Name}}(CallOpts opts{{range .Normalized.Inputs}}, {{bindtype .Type}} {{.Name}}{{end}}) throws Exception {
+				Interfaces args = Geth.newInterfaces({{(len .Normalized.Inputs)}});
+				{{range $index, $item := .Normalized.Inputs}}args.set({{$index}}, Geth.newInterface()); args.get({{$index}}).set{{namedtype (bindtype .Type) .Type}}({{.Name}});
+				{{end}}
+
+				Interfaces results = Geth.newInterfaces({{(len .Normalized.Outputs)}});
+				{{range $index, $item := .Normalized.Outputs}}Interface result{{$index}} = Geth.newInterface(); result{{$index}}.setDefault{{namedtype (bindtype .Type) .Type}}(); results.set({{$index}}, result{{$index}});
+				{{end}}
+
+				if (opts == null) {
+					opts = Geth.newCallOpts();
+				}
+				this.Contract.call(opts, results, "{{.Original.Name}}", args);
+				{{if gt (len .Normalized.Outputs) 1}}
+					{{capitalise .Normalized.Name}}Results result = new {{capitalise .Normalized.Name}}Results();
+					{{range $index, $item := .Normalized.Outputs}}result.{{if ne .Name ""}}{{.Name}}{{else}}Return{{$index}}{{end}} = results.get({{$index}}).get{{namedtype (bindtype .Type) .Type}}();
+					{{end}}
+					return result;
+				{{else}}{{range .Normalized.Outputs}}return results.get(0).get{{namedtype (bindtype .Type) .Type}}();{{end}}
+				{{end}}
+			}
+		{{end}}
+
+		{{range .Transacts}}
+			// {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}.
+			//
+			// Solidity: {{.Original.String}}
+			public Transaction {{.Normalized.Name}}(TransactOpts opts{{range .Normalized.Inputs}}, {{bindtype .Type}} {{.Name}}{{end}}) throws Exception {
+				Interfaces args = Geth.newInterfaces({{(len .Normalized.Inputs)}});
+				{{range $index, $item := .Normalized.Inputs}}args.set({{$index}}, Geth.newInterface()); args.get({{$index}}).set{{namedtype (bindtype .Type) .Type}}({{.Name}});
+				{{end}}
+
+				return this.Contract.transact(opts, "{{.Original.Name}}"	, args);
+			}
+		{{end}}
+	}
+{{end}}
+`

accounts/key_store_passphrase.go

@@ -46,12 +46,20 @@ import (
 const (
 	keyHeaderKDF = "scrypt"
 
-	// n,r,p = 2^18, 8, 1 uses 256MB memory and approx 1s CPU time on a modern CPU.
+	// StandardScryptN is the N parameter of Scrypt encryption algorithm, using 256MB
+	// memory and taking approximately 1s CPU time on a modern processor.
 	StandardScryptN = 1 << 18
+
+	// StandardScryptP is the P parameter of Scrypt encryption algorithm, using 256MB
+	// memory and taking approximately 1s CPU time on a modern processor.
 	StandardScryptP = 1
 
-	// n,r,p = 2^12, 8, 6 uses 4MB memory and approx 100ms CPU time on a modern CPU.
+	// LightScryptN is the N parameter of Scrypt encryption algorithm, using 4MB
+	// memory and taking approximately 100ms CPU time on a modern processor.
 	LightScryptN = 1 << 12
+
+	// LightScryptP is the P parameter of Scrypt encryption algorithm, using 4MB
+	// memory and taking approximately 100ms CPU time on a modern processor.
 	LightScryptP = 6
 
 	scryptR     = 8

cmd/abigen/main.go

@@ -31,14 +31,15 @@ import (
 var (
 	abiFlag = flag.String("abi", "", "Path to the Ethereum contract ABI json to bind")
 	binFlag = flag.String("bin", "", "Path to the Ethereum contract bytecode (generate deploy method)")
-	typFlag = flag.String("type", "", "Go struct name for the binding (default = package name)")
+	typFlag = flag.String("type", "", "Struct name for the binding (default = package name)")
 
 	solFlag  = flag.String("sol", "", "Path to the Ethereum contract Solidity source to build and bind")
 	solcFlag = flag.String("solc", "solc", "Solidity compiler to use if source builds are requested")
 	excFlag  = flag.String("exc", "", "Comma separated types to exclude from binding")
 
-	pkgFlag = flag.String("pkg", "", "Go package name to generate the binding into")
+	pkgFlag  = flag.String("pkg", "", "Package name to generate the binding into")
-	outFlag = flag.String("out", "", "Output file for the generated binding (default = stdout)")
+	outFlag  = flag.String("out", "", "Output file for the generated binding (default = stdout)")
+	langFlag = flag.String("lang", "go", "Destination language for the bindings (go, java, objc)")
 )
 
 func main() {
@@ -53,7 +54,19 @@ func main() {
 		os.Exit(-1)
 	}
 	if *pkgFlag == "" {
-		fmt.Printf("No destination Go package specified (--pkg)\n")
+		fmt.Printf("No destination package specified (--pkg)\n")
+		os.Exit(-1)
+	}
+	var lang bind.Lang
+	switch *langFlag {
+	case "go":
+		lang = bind.LangGo
+	case "java":
+		lang = bind.LangJava
+	case "objc":
+		lang = bind.LangObjC
+	default:
+		fmt.Printf("Unsupported destination language \"%s\" (--lang)\n", *langFlag)
 		os.Exit(-1)
 	}
 	// If the entire solidity code was specified, build and bind based on that
@@ -108,7 +121,7 @@ func main() {
 		types = append(types, kind)
 	}
 	// Generate the contract binding
-	code, err := bind.Bind(types, abis, bins, *pkgFlag)
+	code, err := bind.Bind(types, abis, bins, *pkgFlag, lang)
 	if err != nil {
 		fmt.Printf("Failed to generate ABI binding: %v\n", err)
 		os.Exit(-1)

cmd/utils/bootnodes.go

@@ -16,11 +16,15 @@
 
 package utils
 
-import "github.com/ethereum/go-ethereum/p2p/discover"
+import (
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/p2p/discover"
+	"github.com/ethereum/go-ethereum/params"
+)
 
-// FrontierBootNodes are the enode URLs of the P2P bootstrap nodes running on
+// MainnetBootnodes are the enode URLs of the P2P bootstrap nodes running on
-// the Frontier network.
+// the main Ethereum network.
-var FrontierBootNodes = []*discover.Node{
+var MainnetBootnodes = []*discover.Node{
 	// ETH/DEV Go Bootnodes
 	discover.MustParseNode("enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@52.16.188.185:30303"), // IE
 	discover.MustParseNode("enode://de471bccee3d042261d52e9bff31458daecc406142b401d4cd848f677479f73104b9fdeb090af9583d3391b7f10cb2ba9e26865dd5fca4fcdc0fb1e3b723c786@54.94.239.50:30303"),  // BR
@@ -30,12 +34,26 @@ var FrontierBootNodes = []*discover.Node{
 	discover.MustParseNode("enode://979b7fa28feeb35a4741660a16076f1943202cb72b6af70d327f053e248bab9ba81760f39d0701ef1d8f89cc1fbd2cacba0710a12cd5314d5e0c9021aa3637f9@5.1.83.226:30303"),
 }
 
-// TestNetBootNodes are the enode URLs of the P2P bootstrap nodes running on the
+// TestnetBootnodes are the enode URLs of the P2P bootstrap nodes running on the
 // Morden test network.
-var TestNetBootNodes = []*discover.Node{
+var TestnetBootnodes = []*discover.Node{
 	// ETH/DEV Go Bootnodes
 	discover.MustParseNode("enode://e4533109cc9bd7604e4ff6c095f7a1d807e15b38e9bfeb05d3b7c423ba86af0a9e89abbf40bd9dde4250fef114cd09270fa4e224cbeef8b7bf05a51e8260d6b8@94.242.229.4:40404"),
 	discover.MustParseNode("enode://8c336ee6f03e99613ad21274f269479bf4413fb294d697ef15ab897598afb931f56beb8e97af530aee20ce2bcba5776f4a312bc168545de4d43736992c814592@94.242.229.203:30303"),
 
 	// ETH/DEV Cpp Bootnodes
 }
+
+// MainnetChainConfig is the chain parameters to run a node on the main network.
+var MainnetChainConfig = &core.ChainConfig{
+	HomesteadBlock: params.MainNetHomesteadBlock,
+	DAOForkBlock:   params.MainNetDAOForkBlock,
+	DAOForkSupport: true,
+}
+
+// TestnetChainConfig is the chain parameters to run a node on the test network.
+var TestnetChainConfig = &core.ChainConfig{
+	HomesteadBlock: params.TestNetHomesteadBlock,
+	DAOForkBlock:   params.TestNetDAOForkBlock,
+	DAOForkSupport: false,
+}

cmd/utils/flags.go

@@ -487,9 +487,9 @@ func MakeBootstrapNodes(ctx *cli.Context) []*discover.Node {
 	// Return pre-configured nodes if none were manually requested
 	if !ctx.GlobalIsSet(BootnodesFlag.Name) {
 		if ctx.GlobalBool(TestNetFlag.Name) {
-			return TestNetBootNodes
+			return TestnetBootnodes
 		}
-		return FrontierBootNodes
+		return MainnetBootnodes
 	}
 	// Otherwise parse and use the CLI bootstrap nodes
 	bootnodes := []*discover.Node{}

common/types.go

@@ -35,7 +35,10 @@ const (
 var hashJsonLengthErr = errors.New("common: unmarshalJSON failed: hash must be exactly 32 bytes")
 
 type (
-	Hash    [HashLength]byte
+	// Hash represents the 32 byte Keccak256 hash of arbitrary data.
+	Hash [HashLength]byte
+
+	// Address represents the 20 byte address of an Ethereum account.
 	Address [AddressLength]byte
 )
 

core/types/block.go

@@ -79,7 +79,7 @@ func (n *BlockNonce) UnmarshalJSON(input []byte) error {
 	return nil
 }
 
-// Header represents Ethereum block headers.
+// Header represents a block header in the Ethereum blockchain.
 type Header struct {
 	ParentHash  common.Hash    // Hash to the previous block
 	UncleHash   common.Hash    // Uncles of this block
@@ -214,7 +214,7 @@ type Body struct {
 	Uncles       []*Header
 }
 
-// Block represents a block in the Ethereum blockchain.
+// Block represents an entire block in the Ethereum blockchain.
 type Block struct {
 	header       *Header
 	uncles       []*Header

mobile/accounts.go

@@ -0,0 +1,181 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the accounts package to support client side key
+// management on mobile platforms.
+
+package geth
+
+import (
+	"errors"
+	"time"
+
+	"github.com/ethereum/go-ethereum/accounts"
+)
+
+const (
+	// StandardScryptN is the N parameter of Scrypt encryption algorithm, using 256MB
+	// memory and taking approximately 1s CPU time on a modern processor.
+	StandardScryptN = int(accounts.StandardScryptN)
+
+	// StandardScryptP is the P parameter of Scrypt encryption algorithm, using 256MB
+	// memory and taking approximately 1s CPU time on a modern processor.
+	StandardScryptP = int(accounts.StandardScryptP)
+
+	// LightScryptN is the N parameter of Scrypt encryption algorithm, using 4MB
+	// memory and taking approximately 100ms CPU time on a modern processor.
+	LightScryptN = int(accounts.LightScryptN)
+
+	// LightScryptP is the P parameter of Scrypt encryption algorithm, using 4MB
+	// memory and taking approximately 100ms CPU time on a modern processor.
+	LightScryptP = int(accounts.LightScryptP)
+)
+
+// Account represents a stored key.
+type Account struct{ account accounts.Account }
+
+// Accounts represents a slice of accounts.
+type Accounts struct{ accounts []accounts.Account }
+
+// Size returns the number of accounts in the slice.
+func (a *Accounts) Size() int {
+	return len(a.accounts)
+}
+
+// Get returns the account at the given index from the slice.
+func (a *Accounts) Get(index int) (*Account, error) {
+	if index < 0 || index >= len(a.accounts) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Account{a.accounts[index]}, nil
+}
+
+// Set sets the account at the given index in the slice.
+func (a *Accounts) Set(index int, account *Account) error {
+	if index < 0 || index >= len(a.accounts) {
+		return errors.New("index out of bounds")
+	}
+	a.accounts[index] = account.account
+	return nil
+}
+
+// GetAddress retrieves the address associated with the account.
+func (a *Account) GetAddress() *Address {
+	return &Address{a.account.Address}
+}
+
+// GetFile retrieves the path of the file containing the account key.
+func (a *Account) GetFile() string {
+	return a.account.File
+}
+
+// AccountManager manages a key storage directory on disk.
+type AccountManager struct{ manager *accounts.Manager }
+
+// NewAccountManager creates a manager for the given directory.
+func NewAccountManager(keydir string, scryptN, scryptP int) *AccountManager {
+	return &AccountManager{manager: accounts.NewManager(keydir, scryptN, scryptP)}
+}
+
+// HasAddress reports whether a key with the given address is present.
+func (am *AccountManager) HasAddress(addr *Address) bool {
+	return am.manager.HasAddress(addr.address)
+}
+
+// GetAccounts returns all key files present in the directory.
+func (am *AccountManager) GetAccounts() *Accounts {
+	return &Accounts{am.manager.Accounts()}
+}
+
+// DeleteAccount deletes the key matched by account if the passphrase is correct.
+// If a contains no filename, the address must match a unique key.
+func (am *AccountManager) DeleteAccount(a *Account, passphrase string) error {
+	return am.manager.DeleteAccount(accounts.Account{
+		Address: a.account.Address,
+		File:    a.account.File,
+	}, passphrase)
+}
+
+// Sign signs hash with an unlocked private key matching the given address.
+func (am *AccountManager) Sign(addr *Address, hash []byte) ([]byte, error) {
+	return am.manager.Sign(addr.address, hash)
+}
+
+// SignWithPassphrase signs hash if the private key matching the given address can be
+// decrypted with the given passphrase.
+func (am *AccountManager) SignWithPassphrase(addr *Address, passphrase string, hash []byte) ([]byte, error) {
+	return am.manager.SignWithPassphrase(addr.address, passphrase, hash)
+}
+
+// Unlock unlocks the given account indefinitely.
+func (am *AccountManager) Unlock(a *Account, passphrase string) error {
+	return am.manager.TimedUnlock(a.account, passphrase, 0)
+}
+
+// Lock removes the private key with the given address from memory.
+func (am *AccountManager) Lock(addr *Address) error {
+	return am.manager.Lock(addr.address)
+}
+
+// TimedUnlock unlocks the given account with the passphrase. The account
+// stays unlocked for the duration of timeout. A timeout of 0 unlocks the account
+// until the program exits. The account must match a unique key file.
+//
+// If the account address is already unlocked for a duration, TimedUnlock extends or
+// shortens the active unlock timeout. If the address was previously unlocked
+// indefinitely the timeout is not altered.
+func (am *AccountManager) TimedUnlock(a *Account, passphrase string, timeout int64) error {
+	return am.manager.TimedUnlock(a.account, passphrase, time.Duration(timeout))
+}
+
+// NewAccount generates a new key and stores it into the key directory,
+// encrypting it with the passphrase.
+func (am *AccountManager) NewAccount(passphrase string) (*Account, error) {
+	account, err := am.manager.NewAccount(passphrase)
+	if err != nil {
+		return nil, err
+	}
+	return &Account{account}, nil
+}
+
+// ExportKey exports as a JSON key, encrypted with newPassphrase.
+func (am *AccountManager) ExportKey(a *Account, passphrase, newPassphrase string) ([]byte, error) {
+	return am.manager.Export(a.account, passphrase, newPassphrase)
+}
+
+// ImportKey stores the given encrypted JSON key into the key directory.
+func (am *AccountManager) ImportKey(keyJSON []byte, passphrase, newPassphrase string) (*Account, error) {
+	account, err := am.manager.Import(keyJSON, passphrase, newPassphrase)
+	if err != nil {
+		return nil, err
+	}
+	return &Account{account}, nil
+}
+
+// Update changes the passphrase of an existing account.
+func (am *AccountManager) Update(a *Account, passphrase, newPassphrase string) error {
+	return am.manager.Update(a.account, passphrase, newPassphrase)
+}
+
+// ImportPreSaleKey decrypts the given Ethereum presale wallet and stores
+// a key file in the key directory. The key file is encrypted with the same passphrase.
+func (am *AccountManager) ImportPreSaleKey(keyJSON []byte, passphrase string) (*Account, error) {
+	account, err := am.manager.ImportPreSaleKey(keyJSON, passphrase)
+	if err != nil {
+		return nil, err
+	}
+	return &Account{account}, nil
+}

mobile/big.go

@@ -0,0 +1,95 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the math/big package.
+
+package geth
+
+import (
+	"errors"
+	"math/big"
+)
+
+// A BigInt represents a signed multi-precision integer.
+type BigInt struct {
+	bigint *big.Int
+}
+
+// NewBigInt allocates and returns a new BigInt set to x.
+func NewBigInt(x int64) *BigInt {
+	return &BigInt{big.NewInt(x)}
+}
+
+// GetBytes returns the absolute value of x as a big-endian byte slice.
+func (bi *BigInt) GetBytes() []byte {
+	return bi.bigint.Bytes()
+}
+
+// String returns the value of x as a formatted decimal string.
+func (bi *BigInt) String() string {
+	return bi.bigint.String()
+}
+
+// GetInt64 returns the int64 representation of x. If x cannot be represented in
+// an int64, the result is undefined.
+func (bi *BigInt) GetInt64() int64 {
+	return bi.bigint.Int64()
+}
+
+// SetBytes interprets buf as the bytes of a big-endian unsigned integer and sets
+// the big int to that value.
+func (bi *BigInt) SetBytes(buf []byte) {
+	bi.bigint.SetBytes(buf)
+}
+
+// SetInt64 sets the big int to x.
+func (bi *BigInt) SetInt64(x int64) {
+	bi.bigint.SetInt64(x)
+}
+
+// SetString sets the big int to x.
+//
+// The string prefix determines the actual conversion base. A prefix of "0x" or
+// "0X" selects base 16; the "0" prefix selects base 8, and a "0b" or "0B" prefix
+// selects base 2. Otherwise the selected base is 10.
+func (bi *BigInt) SetString(x string, base int) {
+	bi.bigint.SetString(x, base)
+}
+
+// BigInts represents a slice of big ints.
+type BigInts struct{ bigints []*big.Int }
+
+// Size returns the number of big ints in the slice.
+func (bi *BigInts) Size() int {
+	return len(bi.bigints)
+}
+
+// Get returns the bigint at the given index from the slice.
+func (bi *BigInts) Get(index int) (*BigInt, error) {
+	if index < 0 || index >= len(bi.bigints) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &BigInt{bi.bigints[index]}, nil
+}
+
+// Set sets the big int at the given index in the slice.
+func (bi *BigInts) Set(index int, bigint *BigInt) error {
+	if index < 0 || index >= len(bi.bigints) {
+		return errors.New("index out of bounds")
+	}
+	bi.bigints[index] = bigint.bigint
+	return nil
+}

mobile/big_go1.7.go

@@ -0,0 +1,26 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains the wrappers from the math/big package that require Go 1.7 and above.
+
+// +build go1.7
+
+package geth
+
+// GetString returns the value of x as a formatted string in some number base.
+func (bi *BigInt) GetString(base int) string {
+	return bi.bigint.Text(base)
+}

mobile/bind.go

@@ -0,0 +1,202 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the bind package.
+
+package geth
+
+import (
+	"math/big"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+// Signer is an interaface defining the callback when a contract requires a
+// method to sign the transaction before submission.
+type Signer interface {
+	Sign(*Address, *Transaction) (*Transaction, error)
+}
+
+type signer struct {
+	sign bind.SignerFn
+}
+
+func (s *signer) Sign(addr *Address, tx *Transaction) (*Transaction, error) {
+	sig, err := s.sign(addr.address, tx.tx)
+	if err != nil {
+		return nil, err
+	}
+	return &Transaction{sig}, nil
+}
+
+// CallOpts is the collection of options to fine tune a contract call request.
+type CallOpts struct {
+	opts bind.CallOpts
+}
+
+// NewCallOpts creates a new option set for contract calls.
+func NewCallOpts() *CallOpts {
+	return new(CallOpts)
+}
+
+func (opts *CallOpts) IsPending() bool    { return opts.opts.Pending }
+func (opts *CallOpts) GetGasLimit() int64 { return 0 /* TODO(karalabe) */ }
+
+// GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
+// Even then it's awkward to unpack the subtleties of a Go context out to Java.
+// func (opts *CallOpts) GetContext() *Context { return &Context{opts.opts.Context} }
+
+func (opts *CallOpts) SetPending(pending bool)     { opts.opts.Pending = pending }
+func (opts *CallOpts) SetGasLimit(limit int64)     { /* TODO(karalabe) */ }
+func (opts *CallOpts) SetContext(context *Context) { opts.opts.Context = context.context }
+
+// TransactOpts is the collection of authorization data required to create a
+// valid Ethereum transaction.
+type TransactOpts struct {
+	opts bind.TransactOpts
+}
+
+func (opts *TransactOpts) GetFrom() *Address    { return &Address{opts.opts.From} }
+func (opts *TransactOpts) GetNonce() int64      { return opts.opts.Nonce.Int64() }
+func (opts *TransactOpts) GetValue() *BigInt    { return &BigInt{opts.opts.Value} }
+func (opts *TransactOpts) GetGasPrice() *BigInt { return &BigInt{opts.opts.GasPrice} }
+func (opts *TransactOpts) GetGasLimit() int64   { return opts.opts.GasLimit.Int64() }
+
+// GetSigner cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
+// func (opts *TransactOpts) GetSigner() Signer { return &signer{opts.opts.Signer} }
+
+// GetContext cannot be reliably implemented without identity preservation (https://github.com/golang/go/issues/16876)
+// Even then it's awkward to unpack the subtleties of a Go context out to Java.
+//func (opts *TransactOpts) GetContext() *Context { return &Context{opts.opts.Context} }
+
+func (opts *TransactOpts) SetFrom(from *Address) { opts.opts.From = from.address }
+func (opts *TransactOpts) SetNonce(nonce int64)  { opts.opts.Nonce = big.NewInt(nonce) }
+func (opts *TransactOpts) SetSigner(s Signer) {
+	opts.opts.Signer = func(addr common.Address, tx *types.Transaction) (*types.Transaction, error) {
+		sig, err := s.Sign(&Address{addr}, &Transaction{tx})
+		if err != nil {
+			return nil, err
+		}
+		return sig.tx, nil
+	}
+}
+func (opts *TransactOpts) SetValue(value *BigInt)      { opts.opts.Value = value.bigint }
+func (opts *TransactOpts) SetGasPrice(price *BigInt)   { opts.opts.GasPrice = price.bigint }
+func (opts *TransactOpts) SetGasLimit(limit int64)     { opts.opts.GasLimit = big.NewInt(limit) }
+func (opts *TransactOpts) SetContext(context *Context) { opts.opts.Context = context.context }
+
+// BoundContract is the base wrapper object that reflects a contract on the
+// Ethereum network. It contains a collection of methods that are used by the
+// higher level contract bindings to operate.
+type BoundContract struct {
+	contract *bind.BoundContract
+	address  common.Address
+	deployer *types.Transaction
+}
+
+// DeployContract deploys a contract onto the Ethereum blockchain and binds the
+// deployment address with a wrapper.
+func DeployContract(opts *TransactOpts, abiJSON string, bytecode []byte, client *EthereumClient, args *Interfaces) (*BoundContract, error) {
+	// Convert all the deployment parameters to Go types
+	params := make([]interface{}, len(args.objects))
+	for i, obj := range args.objects {
+		params[i] = obj
+	}
+	// Deploy the contract to the network
+	parsed, err := abi.JSON(strings.NewReader(abiJSON))
+	if err != nil {
+		return nil, err
+	}
+	addr, tx, bound, err := bind.DeployContract(&opts.opts, parsed, bytecode, client.client, params...)
+	if err != nil {
+		return nil, err
+	}
+	return &BoundContract{
+		contract: bound,
+		address:  addr,
+		deployer: tx,
+	}, nil
+}
+
+// BindContract creates a low level contract interface through which calls and
+// transactions may be made through.
+func BindContract(address *Address, abiJSON string, client *EthereumClient) (*BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(abiJSON))
+	if err != nil {
+		return nil, err
+	}
+	return &BoundContract{
+		contract: bind.NewBoundContract(address.address, parsed, client.client, client.client),
+		address:  address.address,
+	}, nil
+}
+
+func (c *BoundContract) GetAddress() *Address { return &Address{c.address} }
+func (c *BoundContract) GetDeployer() *Transaction {
+	if c.deployer == nil {
+		return nil
+	}
+	return &Transaction{c.deployer}
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result.
+func (c *BoundContract) Call(opts *CallOpts, out *Interfaces, method string, args *Interfaces) error {
+	// Convert all the input and output parameters to Go types
+	params := make([]interface{}, len(args.objects))
+	for i, obj := range args.objects {
+		params[i] = obj
+	}
+	results := make([]interface{}, len(out.objects))
+	for i, obj := range out.objects {
+		results[i] = obj
+	}
+	// Execute the call to the contract and wrap any results
+	if err := c.contract.Call(&opts.opts, &results, method, params...); err != nil {
+		return err
+	}
+	for i, res := range results {
+		out.objects[i] = res
+	}
+	return nil
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (c *BoundContract) Transact(opts *TransactOpts, method string, args *Interfaces) (*Transaction, error) {
+	params := make([]interface{}, len(args.objects))
+	for i, obj := range args.objects {
+		params[i] = obj
+	}
+	tx, err := c.contract.Transact(&opts.opts, method, params)
+	if err != nil {
+		return nil, err
+	}
+	return &Transaction{tx}, nil
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (c *BoundContract) Transfer(opts *TransactOpts) (*Transaction, error) {
+	tx, err := c.contract.Transfer(&opts.opts)
+	if err != nil {
+		return nil, err
+	}
+	return &Transaction{tx}, nil
+}

mobile/common.go

@@ -0,0 +1,187 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the common package.
+
+package geth
+
+import (
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// Hash represents the 32 byte Keccak256 hash of arbitrary data.
+type Hash struct {
+	hash common.Hash
+}
+
+// NewHashFromBytes converts a slice of bytes to a hash value.
+func NewHashFromBytes(hash []byte) (*Hash, error) {
+	h := new(Hash)
+	if err := h.SetBytes(hash); err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+// NewHashFromHex converts a hex string to a hash value.
+func NewHashFromHex(hash string) (*Hash, error) {
+	h := new(Hash)
+	if err := h.SetHex(hash); err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+// SetBytes sets the specified slice of bytes as the hash value.
+func (h *Hash) SetBytes(hash []byte) error {
+	if length := len(hash); length != common.HashLength {
+		return fmt.Errorf("invalid hash length: %v != %v", length, common.HashLength)
+	}
+	copy(h.hash[:], hash)
+	return nil
+}
+
+// GetBytes retrieves the byte representation of the hash.
+func (h *Hash) GetBytes() []byte {
+	return h.hash[:]
+}
+
+// SetHex sets the specified hex string as the hash value.
+func (h *Hash) SetHex(hash string) error {
+	hash = strings.ToLower(hash)
+	if len(hash) >= 2 && hash[:2] == "0x" {
+		hash = hash[2:]
+	}
+	if length := len(hash); length != 2*common.HashLength {
+		return fmt.Errorf("invalid hash hex length: %v != %v", length, 2*common.HashLength)
+	}
+	bin, err := hex.DecodeString(hash)
+	if err != nil {
+		return err
+	}
+	copy(h.hash[:], bin)
+	return nil
+}
+
+// GetHex retrieves the hex string representation of the hash.
+func (h *Hash) GetHex() string {
+	return h.hash.Hex()
+}
+
+// Hashes represents a slice of hashes.
+type Hashes struct{ hashes []common.Hash }
+
+// Size returns the number of hashes in the slice.
+func (h *Hashes) Size() int {
+	return len(h.hashes)
+}
+
+// Get returns the hash at the given index from the slice.
+func (h *Hashes) Get(index int) (*Hash, error) {
+	if index < 0 || index >= len(h.hashes) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Hash{h.hashes[index]}, nil
+}
+
+// Address represents the 20 byte address of an Ethereum account.
+type Address struct {
+	address common.Address
+}
+
+// NewAddressFromBytes converts a slice of bytes to a hash value.
+func NewAddressFromBytes(address []byte) (*Address, error) {
+	a := new(Address)
+	if err := a.SetBytes(address); err != nil {
+		return nil, err
+	}
+	return a, nil
+}
+
+// NewAddressFromHex converts a hex string to a address value.
+func NewAddressFromHex(address string) (*Address, error) {
+	a := new(Address)
+	if err := a.SetHex(address); err != nil {
+		return nil, err
+	}
+	return a, nil
+}
+
+// SetBytes sets the specified slice of bytes as the address value.
+func (a *Address) SetBytes(address []byte) error {
+	if length := len(address); length != common.AddressLength {
+		return fmt.Errorf("invalid address length: %v != %v", length, common.AddressLength)
+	}
+	copy(a.address[:], address)
+	return nil
+}
+
+// GetBytes retrieves the byte representation of the address.
+func (a *Address) GetBytes() []byte {
+	return a.address[:]
+}
+
+// SetHex sets the specified hex string as the address value.
+func (a *Address) SetHex(address string) error {
+	address = strings.ToLower(address)
+	if len(address) >= 2 && address[:2] == "0x" {
+		address = address[2:]
+	}
+	if length := len(address); length != 2*common.AddressLength {
+		return fmt.Errorf("invalid address hex length: %v != %v", length, 2*common.AddressLength)
+	}
+	bin, err := hex.DecodeString(address)
+	if err != nil {
+		return err
+	}
+	copy(a.address[:], bin)
+	return nil
+}
+
+// GetHex retrieves the hex string representation of the address.
+func (a *Address) GetHex() string {
+	return a.address.Hex()
+}
+
+// Addresses represents a slice of addresses.
+type Addresses struct{ addresses []common.Address }
+
+// Size returns the number of addresses in the slice.
+func (a *Addresses) Size() int {
+	return len(a.addresses)
+}
+
+// Get returns the address at the given index from the slice.
+func (a *Addresses) Get(index int) (*Address, error) {
+	if index < 0 || index >= len(a.addresses) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Address{a.addresses[index]}, nil
+}
+
+// Set sets the address at the given index in the slice.
+func (a *Addresses) Set(index int, address *Address) error {
+	if index < 0 || index >= len(a.addresses) {
+		return errors.New("index out of bounds")
+	}
+	a.addresses[index] = address.address
+	return nil
+}

mobile/context.go

@@ -0,0 +1,81 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the golang.org/x/net/context package to support
+// client side context management on mobile platforms.
+
+package geth
+
+import (
+	"time"
+
+	"golang.org/x/net/context"
+)
+
+// Context carries a deadline, a cancelation signal, and other values across API
+// boundaries.
+type Context struct {
+	context context.Context
+	cancel  context.CancelFunc
+}
+
+// NewContext returns a non-nil, empty Context. It is never canceled, has no
+// values, and has no deadline. It is typically used by the main function,
+// initialization, and tests, and as the top-level Context for incoming requests.
+func NewContext() *Context {
+	return &Context{
+		context: context.Background(),
+	}
+}
+
+// WithCancel returns a copy of the original context with cancellation mechanism
+// included.
+//
+// Canceling this context releases resources associated with it, so code should
+// call cancel as soon as the operations running in this Context complete.
+func (c *Context) WithCancel() *Context {
+	child, cancel := context.WithCancel(c.context)
+	return &Context{
+		context: child,
+		cancel:  cancel,
+	}
+}
+
+// WithDeadline returns a copy of the original context with the deadline adjusted
+// to be no later than the specified time.
+//
+// Canceling this context releases resources associated with it, so code should
+// call cancel as soon as the operations running in this Context complete.
+func (c *Context) WithDeadline(sec int64, nsec int64) *Context {
+	child, cancel := context.WithDeadline(c.context, time.Unix(sec, nsec))
+	return &Context{
+		context: child,
+		cancel:  cancel,
+	}
+}
+
+// WithTimeout returns a copy of the original context with the deadline adjusted
+// to be no later than now + the duration specified.
+//
+// Canceling this context releases resources associated with it, so code should
+// call cancel as soon as the operations running in this Context complete.
+func (c *Context) WithTimeout(nsec int64) *Context {
+	child, cancel := context.WithTimeout(c.context, time.Duration(nsec))
+	return &Context{
+		context: child,
+		cancel:  cancel,
+	}
+}

mobile/core.go

@@ -0,0 +1,58 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the core package.
+
+package geth
+
+import (
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+// MainnetChainConfig is the chain configurations for the main Ethereum network.
+var MainnetChainConfig = &ChainConfig{
+	HomesteadBlock: params.MainNetHomesteadBlock.Int64(),
+	DAOForkBlock:   params.MainNetDAOForkBlock.Int64(),
+	DAOForkSupport: true,
+}
+
+// MainnetGenesis is the JSON spec to use for the main Ethereum network. It is
+// actually empty since that defaults to the hard coded binary genesis block.
+var MainnetGenesis = ""
+
+// TestnetChainConfig is the chain configurations for the Ethereum test network.
+var TestnetChainConfig = &ChainConfig{
+	HomesteadBlock: params.TestNetHomesteadBlock.Int64(),
+	DAOForkBlock:   0,
+	DAOForkSupport: false,
+}
+
+// TestnetGenesis is the JSON spec to use for the Ethereum test network.
+var TestnetGenesis = core.TestNetGenesisBlock()
+
+// ChainConfig is the core config which determines the blockchain settings.
+type ChainConfig struct {
+	HomesteadBlock int64 // Homestead switch block
+	DAOForkBlock   int64 // TheDAO hard-fork switch block
+	DAOForkSupport bool  // Whether the nodes supports or opposes the DAO hard-fork
+}
+
+// NewChainConfig creates a new chain configuration that transitions immediately
+// to homestead and has no notion of the DAO fork (ideal for a private network).
+func NewChainConfig() *ChainConfig {
+	return new(ChainConfig)
+}

mobile/discover.go

@@ -0,0 +1,129 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the accounts package to support client side enode
+// management on mobile platforms.
+
+package geth
+
+import (
+	"errors"
+
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	"github.com/ethereum/go-ethereum/p2p/discover"
+)
+
+// MainnetBootnodes returns the enode URLs of the P2P bootstrap nodes running
+// on the main network.
+//
+// Note, this needs to be a method to prevent gomobile generating a setter for it.
+func MainnetBootnodes() *Enodes {
+	nodes := &Enodes{nodes: make([]*discover.Node, len(utils.MainnetBootnodes))}
+	for i, node := range utils.MainnetBootnodes {
+		nodes.nodes[i] = node
+	}
+	return nodes
+}
+
+// TestnetBootnodes returns the enode URLs of the P2P bootstrap nodes running
+// on the test network.
+//
+// Note, this needs to be a method to prevent gomobile generating a setter for it.
+func TestnetBootnodes() *Enodes {
+	nodes := &Enodes{nodes: make([]*discover.Node, len(utils.TestnetBootnodes))}
+	for i, node := range utils.TestnetBootnodes {
+		nodes.nodes[i] = node
+	}
+	return nodes
+}
+
+// Enode represents a host on the network.
+type Enode struct {
+	node *discover.Node
+}
+
+// NewEnode parses a node designator.
+//
+// There are two basic forms of node designators
+//   - incomplete nodes, which only have the public key (node ID)
+//   - complete nodes, which contain the public key and IP/Port information
+//
+// For incomplete nodes, the designator must look like one of these
+//
+//    enode://<hex node id>
+//    <hex node id>
+//
+// For complete nodes, the node ID is encoded in the username portion
+// of the URL, separated from the host by an @ sign. The hostname can
+// only be given as an IP address, DNS domain names are not allowed.
+// The port in the host name section is the TCP listening port. If the
+// TCP and UDP (discovery) ports differ, the UDP port is specified as
+// query parameter "discport".
+//
+// In the following example, the node URL describes
+// a node with IP address 10.3.58.6, TCP listening port 30303
+// and UDP discovery port 30301.
+//
+//    enode://<hex node id>@10.3.58.6:30303?discport=30301
+func NewEnode(rawurl string) (*Enode, error) {
+	node, err := discover.ParseNode(rawurl)
+	if err != nil {
+		return nil, err
+	}
+	return &Enode{node}, nil
+}
+
+// Enodes represents a slice of accounts.
+type Enodes struct{ nodes []*discover.Node }
+
+// NewEnodes creates a slice of uninitialized enodes.
+func NewEnodes(size int) *Enodes {
+	return &Enodes{
+		nodes: make([]*discover.Node, size),
+	}
+}
+
+// NewEnodesEmpty creates an empty slice of Enode values.
+func NewEnodesEmpty() *Enodes {
+	return NewEnodes(0)
+}
+
+// Size returns the number of enodes in the slice.
+func (e *Enodes) Size() int {
+	return len(e.nodes)
+}
+
+// Get returns the enode at the given index from the slice.
+func (e *Enodes) Get(index int) (*Enode, error) {
+	if index < 0 || index >= len(e.nodes) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Enode{e.nodes[index]}, nil
+}
+
+// Set sets the enode at the given index in the slice.
+func (e *Enodes) Set(index int, enode *Enode) error {
+	if index < 0 || index >= len(e.nodes) {
+		return errors.New("index out of bounds")
+	}
+	e.nodes[index] = enode.node
+	return nil
+}
+
+// Append adds a new enode element to the end of the slice.
+func (e *Enodes) Append(enode *Enode) {
+	e.nodes = append(e.nodes, enode.node)
+}

mobile/doc.go

@@ -0,0 +1,57 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package geth contains the simplified mobile APIs to go-ethereum.
+//
+// The scope of this package is *not* to allow writing a custom Ethereun client
+// with pieces plucked from go-ethereum, rather to allow writing native dapps on
+// mobile platforms. Keep this in mind when using or extending this package!
+//
+// API limitations
+//
+// Since gomobile cannot bridge arbitrary types between Go and Android/iOS, the
+// exposed APIs need to be manually wrapped into simplified types, with custom
+// constructors and getters/setters to ensure that they can be meaninfully used
+// from Java/ObjC too.
+//
+// With this in mind, please try to limit the scope of this package and only add
+// essentials without which mobile support cannot work, especially since manually
+// syncing the code will be unwieldy otherwise. In the long term we might consider
+// writing custom library generators, but those are out of scope now.
+//
+// Content wise each file in this package corresponds to an entire Go package
+// from the go-ethereum repository. Please adhere to this scoping to prevent this
+// package getting unmaintainable.
+//
+// Wrapping guidelines:
+//
+// Every type that is to be exposed should be wrapped into its own plain struct,
+// which internally contains a single field: the original go-ethereum version.
+// This is needed because gomobile cannot expose named types for now.
+//
+// Whenever a method argument or a return type is a custom struct, the pointer
+// variant should always be used as value types crossing over between language
+// boundaries might have strange behaviors.
+//
+// Slices of types should be converted into a single multiplicative type wrapping
+// a go slice with the methods `Size`, `Get` and `Set`. Further slice operations
+// should not be provided to limit the remote code complexity. Arrays should be
+// avoided as much as possible since they complicate bounds checking.
+//
+// Note, a panic *cannot* cross over language boundaries, instead will result in
+// an undebuggable SEGFAULT in the process. For error handling only ever use error
+// returns, which may be the only or the second return.
+package geth

mobile/ethclient.go

@@ -0,0 +1,305 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains a wrapper for the Ethereum client.
+
+package geth
+
+import (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/ethclient"
+)
+
+// EthereumClient provides access to the Ethereum APIs.
+type EthereumClient struct {
+	client *ethclient.Client
+}
+
+// NewEthereumClient connects a client to the given URL.
+func NewEthereumClient(rawurl string) (*EthereumClient, error) {
+	client, err := ethclient.Dial(rawurl)
+	return &EthereumClient{client}, err
+}
+
+// GetBlockByHash returns the given full block.
+func (ec *EthereumClient) GetBlockByHash(ctx *Context, hash *Hash) (*Block, error) {
+	block, err := ec.client.BlockByHash(ctx.context, hash.hash)
+	return &Block{block}, err
+}
+
+// GetBlockByNumber returns a block from the current canonical chain. If number is <0, the
+// latest known block is returned.
+func (ec *EthereumClient) GetBlockByNumber(ctx *Context, number int64) (*Block, error) {
+	if number < 0 {
+		block, err := ec.client.BlockByNumber(ctx.context, nil)
+		return &Block{block}, err
+	}
+	block, err := ec.client.BlockByNumber(ctx.context, big.NewInt(number))
+	return &Block{block}, err
+}
+
+// GetHeaderByHash returns the block header with the given hash.
+func (ec *EthereumClient) GetHeaderByHash(ctx *Context, hash *Hash) (*Header, error) {
+	header, err := ec.client.HeaderByHash(ctx.context, hash.hash)
+	return &Header{header}, err
+}
+
+// GetHeaderByNumber returns a block header from the current canonical chain. If number is <0,
+// the latest known header is returned.
+func (ec *EthereumClient) GetHeaderByNumber(ctx *Context, number int64) (*Header, error) {
+	if number < 0 {
+		header, err := ec.client.HeaderByNumber(ctx.context, nil)
+		return &Header{header}, err
+	}
+	header, err := ec.client.HeaderByNumber(ctx.context, big.NewInt(number))
+	return &Header{header}, err
+}
+
+// GetTransactionByHash returns the transaction with the given hash.
+func (ec *EthereumClient) GetTransactionByHash(ctx *Context, hash *Hash) (*Transaction, error) {
+	tx, err := ec.client.TransactionByHash(ctx.context, hash.hash)
+	return &Transaction{tx}, err
+}
+
+// GetTransactionCount returns the total number of transactions in the given block.
+func (ec *EthereumClient) GetTransactionCount(ctx *Context, hash *Hash) (int, error) {
+	count, err := ec.client.TransactionCount(ctx.context, hash.hash)
+	return int(count), err
+}
+
+// GetTransactionInBlock returns a single transaction at index in the given block.
+func (ec *EthereumClient) GetTransactionInBlock(ctx *Context, hash *Hash, index int) (*Transaction, error) {
+	tx, err := ec.client.TransactionInBlock(ctx.context, hash.hash, uint(index))
+	return &Transaction{tx}, err
+
+}
+
+// GetTransactionReceipt returns the receipt of a transaction by transaction hash.
+// Note that the receipt is not available for pending transactions.
+func (ec *EthereumClient) GetTransactionReceipt(ctx *Context, hash *Hash) (*Receipt, error) {
+	receipt, err := ec.client.TransactionReceipt(ctx.context, hash.hash)
+	return &Receipt{receipt}, err
+}
+
+// SyncProgress retrieves the current progress of the sync algorithm. If there's
+// no sync currently running, it returns nil.
+func (ec *EthereumClient) SyncProgress(ctx *Context) (*SyncProgress, error) {
+	progress, err := ec.client.SyncProgress(ctx.context)
+	if progress == nil {
+		return nil, err
+	}
+	return &SyncProgress{*progress}, err
+}
+
+// NewHeadHandler is a client-side subscription callback to invoke on events and
+// subscription failure.
+type NewHeadHandler interface {
+	OnNewHead(header *Header)
+	OnError(failure string)
+}
+
+// SubscribeNewHead subscribes to notifications about the current blockchain head
+// on the given channel.
+func (ec *EthereumClient) SubscribeNewHead(ctx *Context, handler NewHeadHandler, buffer int) (*Subscription, error) {
+	// Subscribe to the event internally
+	ch := make(chan *types.Header, buffer)
+	sub, err := ec.client.SubscribeNewHead(ctx.context, ch)
+	if err != nil {
+		return nil, err
+	}
+	// Start up a dispatcher to feed into the callback
+	go func() {
+		for {
+			select {
+			case header := <-ch:
+				handler.OnNewHead(&Header{header})
+
+			case err := <-sub.Err():
+				handler.OnError(err.Error())
+				return
+			}
+		}
+	}()
+	return &Subscription{sub}, nil
+}
+
+// State Access
+
+// GetBalanceAt returns the wei balance of the given account.
+// The block number can be <0, in which case the balance is taken from the latest known block.
+func (ec *EthereumClient) GetBalanceAt(ctx *Context, account *Address, number int64) (*BigInt, error) {
+	if number < 0 {
+		balance, err := ec.client.BalanceAt(ctx.context, account.address, nil)
+		return &BigInt{balance}, err
+	}
+	balance, err := ec.client.BalanceAt(ctx.context, account.address, big.NewInt(number))
+	return &BigInt{balance}, err
+}
+
+// GetStorageAt returns the value of key in the contract storage of the given account.
+// The block number can be <0, in which case the value is taken from the latest known block.
+func (ec *EthereumClient) GetStorageAt(ctx *Context, account *Address, key *Hash, number int64) ([]byte, error) {
+	if number < 0 {
+		return ec.client.StorageAt(ctx.context, account.address, key.hash, nil)
+	}
+	return ec.client.StorageAt(ctx.context, account.address, key.hash, big.NewInt(number))
+}
+
+// GetCodeAt returns the contract code of the given account.
+// The block number can be <0, in which case the code is taken from the latest known block.
+func (ec *EthereumClient) GetCodeAt(ctx *Context, account *Address, number int64) ([]byte, error) {
+	if number < 0 {
+		return ec.client.CodeAt(ctx.context, account.address, nil)
+	}
+	return ec.client.CodeAt(ctx.context, account.address, big.NewInt(number))
+}
+
+// GetNonceAt returns the account nonce of the given account.
+// The block number can be <0, in which case the nonce is taken from the latest known block.
+func (ec *EthereumClient) GetNonceAt(ctx *Context, account *Address, number int64) (int64, error) {
+	if number < 0 {
+		nonce, err := ec.client.NonceAt(ctx.context, account.address, nil)
+		return int64(nonce), err
+	}
+	nonce, err := ec.client.NonceAt(ctx.context, account.address, big.NewInt(number))
+	return int64(nonce), err
+}
+
+// Filters
+
+// FilterLogs executes a filter query.
+func (ec *EthereumClient) FilterLogs(ctx *Context, query *FilterQuery) (*Logs, error) {
+	logs, err := ec.client.FilterLogs(ctx.context, query.query)
+	if err != nil {
+		return nil, err
+	}
+	// Temp hack due to vm.Logs being []*vm.Log
+	res := make(vm.Logs, len(logs))
+	for i, log := range logs {
+		res[i] = &log
+	}
+	return &Logs{res}, nil
+}
+
+// FilterLogsHandler is a client-side subscription callback to invoke on events and
+// subscription failure.
+type FilterLogsHandler interface {
+	OnFilterLogs(log *Log)
+	OnError(failure string)
+}
+
+// SubscribeFilterLogs subscribes to the results of a streaming filter query.
+func (ec *EthereumClient) SubscribeFilterLogs(ctx *Context, query *FilterQuery, handler FilterLogsHandler, buffer int) (*Subscription, error) {
+	// Subscribe to the event internally
+	ch := make(chan vm.Log, buffer)
+	sub, err := ec.client.SubscribeFilterLogs(ctx.context, query.query, ch)
+	if err != nil {
+		return nil, err
+	}
+	// Start up a dispatcher to feed into the callback
+	go func() {
+		for {
+			select {
+			case log := <-ch:
+				handler.OnFilterLogs(&Log{&log})
+
+			case err := <-sub.Err():
+				handler.OnError(err.Error())
+				return
+			}
+		}
+	}()
+	return &Subscription{sub}, nil
+}
+
+// Pending State
+
+// GetPendingBalanceAt returns the wei balance of the given account in the pending state.
+func (ec *EthereumClient) GetPendingBalanceAt(ctx *Context, account *Address) (*BigInt, error) {
+	balance, err := ec.client.PendingBalanceAt(ctx.context, account.address)
+	return &BigInt{balance}, err
+}
+
+// GetPendingStorageAt returns the value of key in the contract storage of the given account in the pending state.
+func (ec *EthereumClient) GetPendingStorageAt(ctx *Context, account *Address, key *Hash) ([]byte, error) {
+	return ec.client.PendingStorageAt(ctx.context, account.address, key.hash)
+}
+
+// GetPendingCodeAt returns the contract code of the given account in the pending state.
+func (ec *EthereumClient) GetPendingCodeAt(ctx *Context, account *Address) ([]byte, error) {
+	return ec.client.PendingCodeAt(ctx.context, account.address)
+}
+
+// GetPendingNonceAt returns the account nonce of the given account in the pending state.
+// This is the nonce that should be used for the next transaction.
+func (ec *EthereumClient) GetPendingNonceAt(ctx *Context, account *Address) (int64, error) {
+	nonce, err := ec.client.PendingNonceAt(ctx.context, account.address)
+	return int64(nonce), err
+}
+
+// GetPendingTransactionCount returns the total number of transactions in the pending state.
+func (ec *EthereumClient) GetPendingTransactionCount(ctx *Context) (int, error) {
+	count, err := ec.client.PendingTransactionCount(ctx.context)
+	return int(count), err
+}
+
+// Contract Calling
+
+// CallContract executes a message call transaction, which is directly executed in the VM
+// of the node, but never mined into the blockchain.
+//
+// blockNumber selects the block height at which the call runs. It can be <0, in which
+// case the code is taken from the latest known block. Note that state from very old
+// blocks might not be available.
+func (ec *EthereumClient) CallContract(ctx *Context, msg *CallMsg, number int64) ([]byte, error) {
+	if number < 0 {
+		return ec.client.CallContract(ctx.context, msg.msg, nil)
+	}
+	return ec.client.CallContract(ctx.context, msg.msg, big.NewInt(number))
+}
+
+// PendingCallContract executes a message call transaction using the EVM.
+// The state seen by the contract call is the pending state.
+func (ec *EthereumClient) PendingCallContract(ctx *Context, msg *CallMsg) ([]byte, error) {
+	return ec.client.PendingCallContract(ctx.context, msg.msg)
+}
+
+// SuggestGasPrice retrieves the currently suggested gas price to allow a timely
+// execution of a transaction.
+func (ec *EthereumClient) SuggestGasPrice(ctx *Context) (*BigInt, error) {
+	price, err := ec.client.SuggestGasPrice(ctx.context)
+	return &BigInt{price}, err
+}
+
+// EstimateGas tries to estimate the gas needed to execute a specific transaction based on
+// the current pending state of the backend blockchain. There is no guarantee that this is
+// the true gas limit requirement as other transactions may be added or removed by miners,
+// but it should provide a basis for setting a reasonable default.
+func (ec *EthereumClient) EstimateGas(ctx *Context, msg *CallMsg) (*BigInt, error) {
+	price, err := ec.client.EstimateGas(ctx.context, msg.msg)
+	return &BigInt{price}, err
+}
+
+// SendTransaction injects a signed transaction into the pending pool for execution.
+//
+// If the transaction was a contract creation use the TransactionReceipt method to get the
+// contract address after the transaction has been mined.
+func (ec *EthereumClient) SendTransaction(ctx *Context, tx *Transaction) error {
+	return ec.client.SendTransaction(ctx.context, tx.tx)
+}

mobile/ethereum.go

@@ -0,0 +1,125 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the go-ethereum root package.
+
+package geth
+
+import (
+	"errors"
+	"math/big"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// Subscription represents an event subscription where events are
+// delivered on a data channel.
+type Subscription struct {
+	sub ethereum.Subscription
+}
+
+// Unsubscribe cancels the sending of events to the data channel
+// and closes the error channel.
+func (s *Subscription) Unsubscribe() {
+	s.sub.Unsubscribe()
+}
+
+// CallMsg contains parameters for contract calls.
+type CallMsg struct {
+	msg ethereum.CallMsg
+}
+
+// NewCallMsg creates an empty contract call parameter list.
+func NewCallMsg() *CallMsg {
+	return new(CallMsg)
+}
+
+func (msg *CallMsg) GetFrom() *Address    { return &Address{msg.msg.From} }
+func (msg *CallMsg) GetGas() int64        { return msg.msg.Gas.Int64() }
+func (msg *CallMsg) GetGasPrice() *BigInt { return &BigInt{msg.msg.GasPrice} }
+func (msg *CallMsg) GetValue() *BigInt    { return &BigInt{msg.msg.Value} }
+func (msg *CallMsg) GetData() []byte      { return msg.msg.Data }
+func (msg *CallMsg) GetTo() *Address {
+	if to := msg.msg.To; to != nil {
+		return &Address{*msg.msg.To}
+	}
+	return nil
+}
+
+func (msg *CallMsg) SetFrom(address *Address)  { msg.msg.From = address.address }
+func (msg *CallMsg) SetGas(gas int64)          { msg.msg.Gas = big.NewInt(gas) }
+func (msg *CallMsg) SetGasPrice(price *BigInt) { msg.msg.GasPrice = price.bigint }
+func (msg *CallMsg) SetValue(value *BigInt)    { msg.msg.Value = value.bigint }
+func (msg *CallMsg) SetData(data []byte)       { msg.msg.Data = data }
+func (msg *CallMsg) SetTo(address *Address) {
+	if address == nil {
+		msg.msg.To = nil
+	}
+	msg.msg.To = &address.address
+}
+
+// SyncProgress gives progress indications when the node is synchronising with
+// the Ethereum network.
+type SyncProgress struct {
+	progress ethereum.SyncProgress
+}
+
+func (p *SyncProgress) GetStartingBlock() int64 { return int64(p.progress.StartingBlock) }
+func (p *SyncProgress) GetCurrentBlock() int64  { return int64(p.progress.CurrentBlock) }
+func (p *SyncProgress) GetHighestBlock() int64  { return int64(p.progress.HighestBlock) }
+func (p *SyncProgress) GetPulledStates() int64  { return int64(p.progress.PulledStates) }
+func (p *SyncProgress) GetKnownStates() int64   { return int64(p.progress.KnownStates) }
+
+// Topics is a set of topic lists to filter events with.
+type Topics struct{ topics [][]common.Hash }
+
+// Size returns the number of topic lists inside the set
+func (t *Topics) Size() int {
+	return len(t.topics)
+}
+
+// Get returns the topic list at the given index from the slice.
+func (t *Topics) Get(index int) (*Hashes, error) {
+	if index < 0 || index >= len(t.topics) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Hashes{t.topics[index]}, nil
+}
+
+// Set sets the topic list at the given index in the slice.
+func (t *Topics) Set(index int, topics *Hashes) error {
+	if index < 0 || index >= len(t.topics) {
+		return errors.New("index out of bounds")
+	}
+	t.topics[index] = topics.hashes
+	return nil
+}
+
+// FilterQuery contains options for contact log filtering.
+type FilterQuery struct {
+	query ethereum.FilterQuery
+}
+
+// NewFilterQuery creates an empty filter query for contact log filtering.
+func NewFilterQuery() *FilterQuery {
+	return new(FilterQuery)
+}
+
+func (fq *FilterQuery) GetFromBlock() *BigInt    { return &BigInt{fq.query.FromBlock} }
+func (fq *FilterQuery) GetToBlock() *BigInt      { return &BigInt{fq.query.ToBlock} }
+func (fq *FilterQuery) GetAddresses() *Addresses { return &Addresses{fq.query.Addresses} }
+func (fq *FilterQuery) GetTopics() *Topics       { return &Topics{fq.query.Topics} }

mobile/geth.go

@@ -0,0 +1,188 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the node package to support client side node
+// management on mobile platforms.
+
+package geth
+
+import (
+	"fmt"
+	"math/big"
+	"path/filepath"
+
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/eth"
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/p2p/nat"
+	"github.com/ethereum/go-ethereum/whisper"
+)
+
+// NodeConfig represents the collection of configuration values to fine tune the Geth
+// node embedded into a mobile process. The available values are a subset of the
+// entire API provided by go-ethereum to reduce the maintenance surface and dev
+// complexity.
+type NodeConfig struct {
+	// Bootstrap nodes used to establish connectivity with the rest of the network.
+	BootstrapNodes *Enodes
+
+	// MaxPeers is the maximum number of peers that can be connected. If this is
+	// set to zero, then only the configured static and trusted peers can connect.
+	MaxPeers int
+
+	// EthereumEnabled specifies whether the node should run the Ethereum protocol.
+	EthereumEnabled bool
+
+	// EthereumNetworkID is the network identifier used by the Ethereum protocol to
+	// decide if remote peers should be accepted or not.
+	EthereumNetworkID int
+
+	// EthereumChainConfig is the default parameters of the blockchain to use. If no
+	// configuration is specified, it defaults to the main network.
+	EthereumChainConfig *ChainConfig
+
+	// EthereumGenesis is the genesis JSON to use to seed the blockchain with. An
+	// empty genesis state is equivalent to using the mainnet's state.
+	EthereumGenesis string
+
+	// EthereumTestnetNonces specifies whether to use account nonces from the testnet
+	// range (2^20) or from the mainnet one (0).
+	EthereumTestnetNonces bool
+
+	// EthereumDatabaseCache is the system memory in MB to allocate for database caching.
+	// A minimum of 16MB is always reserved.
+	EthereumDatabaseCache int
+
+	// WhisperEnabled specifies whether the node should run the Whisper protocol.
+	WhisperEnabled bool
+}
+
+// defaultNodeConfig contains the default node configuration values to use if all
+// or some fields are missing from the user's specified list.
+var defaultNodeConfig = &NodeConfig{
+	BootstrapNodes:        MainnetBootnodes(),
+	MaxPeers:              25,
+	EthereumEnabled:       true,
+	EthereumNetworkID:     1,
+	EthereumChainConfig:   MainnetChainConfig,
+	EthereumDatabaseCache: 16,
+}
+
+// NewNodeConfig creates a new node option set, initialized to the default values.
+func NewNodeConfig() *NodeConfig {
+	config := *defaultNodeConfig
+	return &config
+}
+
+// Node represents a Geth Ethereum node instance.
+type Node struct {
+	node *node.Node
+}
+
+// NewNode creates and configures a new Geth node.
+func NewNode(datadir string, config *NodeConfig) (*Node, error) {
+	// If no or partial configurations were specified, use defaults
+	if config == nil {
+		config = NewNodeConfig()
+	}
+	if config.MaxPeers == 0 {
+		config.MaxPeers = defaultNodeConfig.MaxPeers
+	}
+	// Create the empty networking stack
+	nodeConf := &node.Config{
+		DataDir:        datadir,
+		KeyStoreDir:    filepath.Join(datadir, "keystore"), // Mobile should never use internal keystores!
+		Name:           common.MakeName(clientIdentifier, utils.Version),
+		BootstrapNodes: config.BootstrapNodes.nodes,
+		ListenAddr:     ":0",
+		NAT:            nat.Any(),
+		MaxPeers:       config.MaxPeers,
+	}
+	stack, err := node.New(nodeConf)
+	if err != nil {
+		return nil, err
+	}
+	// Register the Ethereum protocol if requested
+	if config.EthereumEnabled {
+		ethConf := &eth.Config{
+			ChainConfig: &core.ChainConfig{
+				HomesteadBlock: big.NewInt(config.EthereumChainConfig.HomesteadBlock),
+				DAOForkBlock:   big.NewInt(config.EthereumChainConfig.DAOForkBlock),
+				DAOForkSupport: config.EthereumChainConfig.DAOForkSupport,
+			},
+			Genesis:                 config.EthereumGenesis,
+			FastSync:                true,
+			DatabaseCache:           config.EthereumDatabaseCache,
+			NetworkId:               config.EthereumNetworkID,
+			GasPrice:                new(big.Int).Mul(big.NewInt(20), common.Shannon),
+			GpoMinGasPrice:          new(big.Int).Mul(big.NewInt(20), common.Shannon),
+			GpoMaxGasPrice:          new(big.Int).Mul(big.NewInt(500), common.Shannon),
+			GpoFullBlockRatio:       80,
+			GpobaseStepDown:         10,
+			GpobaseStepUp:           100,
+			GpobaseCorrectionFactor: 110,
+		}
+		if config.EthereumTestnetNonces {
+			state.StartingNonce = 1048576 // (2**20)
+		}
+		if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
+			return eth.New(ctx, ethConf)
+		}); err != nil {
+			return nil, fmt.Errorf("ethereum init: %v", err)
+		}
+	}
+	// Register the Whisper protocol if requested
+	if config.WhisperEnabled {
+		if err := stack.Register(func(*node.ServiceContext) (node.Service, error) { return whisper.New(), nil }); err != nil {
+			return nil, fmt.Errorf("whisper init: %v", err)
+		}
+	}
+	return &Node{stack}, nil
+}
+
+// Start creates a live P2P node and starts running it.
+func (n *Node) Start() error {
+	return n.node.Start()
+}
+
+// Stop terminates a running node along with all it's services. In the node was
+// not started, an error is returned.
+func (n *Node) Stop() error {
+	return n.node.Stop()
+}
+
+// GetEthereumClient retrieves a client to access the Ethereum subsystem.
+func (n *Node) GetEthereumClient() (*EthereumClient, error) {
+	rpc, err := n.node.Attach()
+	if err != nil {
+		return nil, err
+	}
+	return &EthereumClient{ethclient.NewClient(rpc)}, nil
+}
+
+// GetNodeInfo gathers and returns a collection of metadata known about the host.
+func (n *Node) GetNodeInfo() *NodeInfo {
+	return &NodeInfo{n.node.Server().NodeInfo()}
+}
+
+// GetPeersInfo returns an array of metadata objects describing connected peers.
+func (n *Node) GetPeersInfo() *PeerInfos {
+	return &PeerInfos{n.node.Server().PeersInfo()}
+}

mobile/geth_android.go

@@ -0,0 +1,22 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// +build android
+
+package geth
+
+// clientIdentifier is a hard coded identifier to report into the network.
+var clientIdentifier = "GethDroid"

mobile/geth_ios.go

@@ -0,0 +1,22 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// +build ios
+
+package geth
+
+// clientIdentifier is a hard coded identifier to report into the network.
+var clientIdentifier = "iGeth"

mobile/geth_other.go

@@ -0,0 +1,22 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// +build !android,!ios
+
+package geth
+
+// clientIdentifier is a hard coded identifier to report into the network.
+var clientIdentifier = "GethMobile"

mobile/glog.go

@@ -0,0 +1,29 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains wrappers and init code for the logger.
+
+package geth
+
+import (
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/logger/glog"
+)
+
+func init() {
+	glog.SetV(logger.Info)
+	glog.SetToStderr(true)
+}

mobile/interface.go

@@ -0,0 +1,148 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains perverted wrappers to allow crossing over empty interfaces.
+
+package geth
+
+import (
+	"errors"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// Interface represents a wrapped version of Go's interface{}, with the capacity
+// to store arbitrary data types.
+//
+// Since it's impossible to get the arbitrary-ness converted between Go and mobile
+// platforms, we're using explicit getters and setters for the conversions. There
+// is of course no point in enumerating everything, just enough to support the
+// contract bindins requiring client side generated code.
+type Interface struct {
+	object interface{}
+}
+
+// NewInterface creates a new empty interface that can be used to pass around
+// generic types.
+func NewInterface() *Interface {
+	return new(Interface)
+}
+
+func (i *Interface) SetBool(b bool)                { i.object = &b }
+func (i *Interface) SetBools(bs []bool)            { i.object = &bs }
+func (i *Interface) SetString(str string)          { i.object = &str }
+func (i *Interface) SetStrings(strs *Strings)      { i.object = &strs.strs }
+func (i *Interface) SetBinary(binary []byte)       { i.object = &binary }
+func (i *Interface) SetBinaries(binaries [][]byte) { i.object = &binaries }
+func (i *Interface) SetAddress(address *Address)   { i.object = &address.address }
+func (i *Interface) SetAddresses(addrs *Addresses) { i.object = &addrs.addresses }
+func (i *Interface) SetHash(hash *Hash)            { i.object = &hash.hash }
+func (i *Interface) SetHashes(hashes *Hashes)      { i.object = &hashes.hashes }
+func (i *Interface) SetInt8(n int8)                { i.object = &n }
+func (i *Interface) SetInt16(n int16)              { i.object = &n }
+func (i *Interface) SetInt32(n int32)              { i.object = &n }
+func (i *Interface) SetInt64(n int64)              { i.object = &n }
+func (i *Interface) SetUint8(bigint *BigInt)       { n := uint8(bigint.bigint.Uint64()); i.object = &n }
+func (i *Interface) SetUint16(bigint *BigInt)      { n := uint16(bigint.bigint.Uint64()); i.object = &n }
+func (i *Interface) SetUint32(bigint *BigInt)      { n := uint32(bigint.bigint.Uint64()); i.object = &n }
+func (i *Interface) SetUint64(bigint *BigInt)      { n := uint64(bigint.bigint.Uint64()); i.object = &n }
+func (i *Interface) SetBigInt(bigint *BigInt)      { i.object = &bigint.bigint }
+func (i *Interface) SetBigInts(bigints *BigInts)   { i.object = &bigints.bigints }
+
+func (i *Interface) SetDefaultBool()      { i.object = new(bool) }
+func (i *Interface) SetDefaultBools()     { i.object = new([]bool) }
+func (i *Interface) SetDefaultString()    { i.object = new(string) }
+func (i *Interface) SetDefaultStrings()   { i.object = new([]string) }
+func (i *Interface) SetDefaultBinary()    { i.object = new([]byte) }
+func (i *Interface) SetDefaultBinaries()  { i.object = new([][]byte) }
+func (i *Interface) SetDefaultAddress()   { i.object = new(common.Address) }
+func (i *Interface) SetDefaultAddresses() { i.object = new([]common.Address) }
+func (i *Interface) SetDefaultHash()      { i.object = new(common.Hash) }
+func (i *Interface) SetDefaultHashes()    { i.object = new([]common.Hash) }
+func (i *Interface) SetDefaultInt8()      { i.object = new(int8) }
+func (i *Interface) SetDefaultInt16()     { i.object = new(int16) }
+func (i *Interface) SetDefaultInt32()     { i.object = new(int32) }
+func (i *Interface) SetDefaultInt64()     { i.object = new(int64) }
+func (i *Interface) SetDefaultUint8()     { i.object = new(uint8) }
+func (i *Interface) SetDefaultUint16()    { i.object = new(uint16) }
+func (i *Interface) SetDefaultUint32()    { i.object = new(uint32) }
+func (i *Interface) SetDefaultUint64()    { i.object = new(uint64) }
+func (i *Interface) SetDefaultBigInt()    { i.object = new(*big.Int) }
+func (i *Interface) SetDefaultBigInts()   { i.object = new([]*big.Int) }
+
+func (i *Interface) GetBool() bool            { return *i.object.(*bool) }
+func (i *Interface) GetBools() []bool         { return *i.object.(*[]bool) }
+func (i *Interface) GetString() string        { return *i.object.(*string) }
+func (i *Interface) GetStrings() *Strings     { return &Strings{*i.object.(*[]string)} }
+func (i *Interface) GetBinary() []byte        { return *i.object.(*[]byte) }
+func (i *Interface) GetBinaries() [][]byte    { return *i.object.(*[][]byte) }
+func (i *Interface) GetAddress() *Address     { return &Address{*i.object.(*common.Address)} }
+func (i *Interface) GetAddresses() *Addresses { return &Addresses{*i.object.(*[]common.Address)} }
+func (i *Interface) GetHash() *Hash           { return &Hash{*i.object.(*common.Hash)} }
+func (i *Interface) GetHashes() *Hashes       { return &Hashes{*i.object.(*[]common.Hash)} }
+func (i *Interface) GetInt8() int8            { return *i.object.(*int8) }
+func (i *Interface) GetInt16() int16          { return *i.object.(*int16) }
+func (i *Interface) GetInt32() int32          { return *i.object.(*int32) }
+func (i *Interface) GetInt64() int64          { return *i.object.(*int64) }
+func (i *Interface) GetUint8() *BigInt {
+	return &BigInt{new(big.Int).SetUint64(uint64(*i.object.(*uint8)))}
+}
+func (i *Interface) GetUint16() *BigInt {
+	return &BigInt{new(big.Int).SetUint64(uint64(*i.object.(*uint16)))}
+}
+func (i *Interface) GetUint32() *BigInt {
+	return &BigInt{new(big.Int).SetUint64(uint64(*i.object.(*uint32)))}
+}
+func (i *Interface) GetUint64() *BigInt {
+	return &BigInt{new(big.Int).SetUint64(*i.object.(*uint64))}
+}
+func (i *Interface) GetBigInt() *BigInt   { return &BigInt{*i.object.(**big.Int)} }
+func (i *Interface) GetBigInts() *BigInts { return &BigInts{*i.object.(*[]*big.Int)} }
+
+// Interfaces is a slices of wrapped generic objects.
+type Interfaces struct {
+	objects []interface{}
+}
+
+// NewInterfaces creates a slice of uninitialized interfaces.
+func NewInterfaces(size int) *Interfaces {
+	return &Interfaces{
+		objects: make([]interface{}, size),
+	}
+}
+
+// Size returns the number of interfaces in the slice.
+func (i *Interfaces) Size() int {
+	return len(i.objects)
+}
+
+// Get returns the bigint at the given index from the slice.
+func (i *Interfaces) Get(index int) (*Interface, error) {
+	if index < 0 || index >= len(i.objects) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Interface{i.objects[index]}, nil
+}
+
+// Set sets the big int at the given index in the slice.
+func (i *Interfaces) Set(index int, object *Interface) error {
+	if index < 0 || index >= len(i.objects) {
+		return errors.New("index out of bounds")
+	}
+	i.objects[index] = object.object
+	return nil
+}

mobile/p2p.go

@@ -0,0 +1,74 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received pi copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains wrappers for the p2p package.
+
+package geth
+
+import (
+	"errors"
+
+	"github.com/ethereum/go-ethereum/p2p"
+)
+
+// NodeInfo represents pi short summary of the information known about the host.
+type NodeInfo struct {
+	info *p2p.NodeInfo
+}
+
+func (ni *NodeInfo) GetID() string              { return ni.info.ID }
+func (ni *NodeInfo) GetName() string            { return ni.info.Name }
+func (ni *NodeInfo) GetEnode() string           { return ni.info.Enode }
+func (ni *NodeInfo) GetIP() string              { return ni.info.IP }
+func (ni *NodeInfo) GetDiscoveryPort() int      { return ni.info.Ports.Discovery }
+func (ni *NodeInfo) GetListenerPort() int       { return ni.info.Ports.Listener }
+func (ni *NodeInfo) GetListenerAddress() string { return ni.info.ListenAddr }
+func (ni *NodeInfo) GetProtocols() *Strings {
+	protos := []string{}
+	for proto, _ := range ni.info.Protocols {
+		protos = append(protos, proto)
+	}
+	return &Strings{protos}
+}
+
+// PeerInfo represents pi short summary of the information known about pi connected peer.
+type PeerInfo struct {
+	info *p2p.PeerInfo
+}
+
+func (pi *PeerInfo) GetID() string            { return pi.info.ID }
+func (pi *PeerInfo) GetName() string          { return pi.info.Name }
+func (pi *PeerInfo) GetCaps() *Strings        { return &Strings{pi.info.Caps} }
+func (pi *PeerInfo) GetLocalAddress() string  { return pi.info.Network.LocalAddress }
+func (pi *PeerInfo) GetRemoteAddress() string { return pi.info.Network.RemoteAddress }
+
+// PeerInfos represents a slice of infos about remote peers.
+type PeerInfos struct {
+	infos []*p2p.PeerInfo
+}
+
+// Size returns the number of peer info entries in the slice.
+func (pi *PeerInfos) Size() int {
+	return len(pi.infos)
+}
+
+// Get returns the peer info at the given index from the slice.
+func (pi *PeerInfos) Get(index int) (*PeerInfo, error) {
+	if index < 0 || index >= len(pi.infos) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &PeerInfo{pi.infos[index]}, nil
+}

mobile/primitives.go

@@ -0,0 +1,54 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received s copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains various wrappers for primitive types.
+
+package geth
+
+import (
+	"errors"
+	"fmt"
+)
+
+// Strings represents s slice of strs.
+type Strings struct{ strs []string }
+
+// Size returns the number of strs in the slice.
+func (s *Strings) Size() int {
+	return len(s.strs)
+}
+
+// Get returns the string at the given index from the slice.
+func (s *Strings) Get(index int) (string, error) {
+	if index < 0 || index >= len(s.strs) {
+		return "", errors.New("index out of bounds")
+	}
+	return s.strs[index], nil
+}
+
+// Set sets the string at the given index in the slice.
+func (s *Strings) Set(index int, str string) error {
+	if index < 0 || index >= len(s.strs) {
+		return errors.New("index out of bounds")
+	}
+	s.strs[index] = str
+	return nil
+}
+
+// String implements the Stringer interface.
+func (s *Strings) String() string {
+	return fmt.Sprintf("%v", s.strs)
+}

mobile/types.go

@@ -0,0 +1,189 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the core/types package.
+
+package geth
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+// A Nonce is a 64-bit hash which proves (combined with the mix-hash) that
+// a sufficient amount of computation has been carried out on a block.
+type Nonce struct {
+	nonce types.BlockNonce
+}
+
+// GetBytes retrieves the byte representation of the block nonce.
+func (n *Nonce) GetBytes() []byte {
+	return n.nonce[:]
+}
+
+// GetHex retrieves the hex string representation of the block nonce.
+func (n *Nonce) GetHex() string {
+	return fmt.Sprintf("0x%x", n.nonce[:])
+}
+
+// Bloom represents a 256 bit bloom filter.
+type Bloom struct {
+	bloom types.Bloom
+}
+
+// GetBytes retrieves the byte representation of the bloom filter.
+func (b *Bloom) GetBytes() []byte {
+	return b.bloom[:]
+}
+
+// GetHex retrieves the hex string representation of the bloom filter.
+func (b *Bloom) GetHex() string {
+	return fmt.Sprintf("0x%x", b.bloom[:])
+}
+
+// Header represents a block header in the Ethereum blockchain.
+type Header struct {
+	header *types.Header
+}
+
+func (h *Header) GetParentHash() *Hash   { return &Hash{h.header.ParentHash} }
+func (h *Header) GetUncleHash() *Hash    { return &Hash{h.header.UncleHash} }
+func (h *Header) GetCoinbase() *Address  { return &Address{h.header.Coinbase} }
+func (h *Header) GetRoot() *Hash         { return &Hash{h.header.Root} }
+func (h *Header) GetTxHash() *Hash       { return &Hash{h.header.TxHash} }
+func (h *Header) GetReceiptHash() *Hash  { return &Hash{h.header.ReceiptHash} }
+func (h *Header) GetBloom() *Bloom       { return &Bloom{h.header.Bloom} }
+func (h *Header) GetDifficulty() *BigInt { return &BigInt{h.header.Difficulty} }
+func (h *Header) GetNumber() int64       { return h.header.Number.Int64() }
+func (h *Header) GetGasLimit() int64     { return h.header.GasLimit.Int64() }
+func (h *Header) GetGasUsed() int64      { return h.header.GasUsed.Int64() }
+func (h *Header) GetTime() int64         { return h.header.Time.Int64() }
+func (h *Header) GetExtra() []byte       { return h.header.Extra }
+func (h *Header) GetMixDigest() *Hash    { return &Hash{h.header.MixDigest} }
+func (h *Header) GetNonce() *Nonce       { return &Nonce{h.header.Nonce} }
+
+func (h *Header) GetHash() *Hash        { return &Hash{h.header.Hash()} }
+func (h *Header) GetHashNoNonce() *Hash { return &Hash{h.header.HashNoNonce()} }
+
+// Headers represents a slice of headers.
+type Headers struct{ headers []*types.Header }
+
+// Size returns the number of headers in the slice.
+func (h *Headers) Size() int {
+	return len(h.headers)
+}
+
+// Get returns the header at the given index from the slice.
+func (h *Headers) Get(index int) (*Header, error) {
+	if index < 0 || index >= len(h.headers) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Header{h.headers[index]}, nil
+}
+
+// Block represents an entire block in the Ethereum blockchain.
+type Block struct {
+	block *types.Block
+}
+
+func (b *Block) GetParentHash() *Hash   { return &Hash{b.block.ParentHash()} }
+func (b *Block) GetUncleHash() *Hash    { return &Hash{b.block.UncleHash()} }
+func (b *Block) GetCoinbase() *Address  { return &Address{b.block.Coinbase()} }
+func (b *Block) GetRoot() *Hash         { return &Hash{b.block.Root()} }
+func (b *Block) GetTxHash() *Hash       { return &Hash{b.block.TxHash()} }
+func (b *Block) GetReceiptHash() *Hash  { return &Hash{b.block.ReceiptHash()} }
+func (b *Block) GetBloom() *Bloom       { return &Bloom{b.block.Bloom()} }
+func (b *Block) GetDifficulty() *BigInt { return &BigInt{b.block.Difficulty()} }
+func (b *Block) GetNumber() int64       { return b.block.Number().Int64() }
+func (b *Block) GetGasLimit() int64     { return b.block.GasLimit().Int64() }
+func (b *Block) GetGasUsed() int64      { return b.block.GasUsed().Int64() }
+func (b *Block) GetTime() int64         { return b.block.Time().Int64() }
+func (b *Block) GetExtra() []byte       { return b.block.Extra() }
+func (b *Block) GetMixDigest() *Hash    { return &Hash{b.block.MixDigest()} }
+func (b *Block) GetNonce() int64        { return int64(b.block.Nonce()) }
+
+func (b *Block) GetHash() *Hash        { return &Hash{b.block.Hash()} }
+func (b *Block) GetHashNoNonce() *Hash { return &Hash{b.block.HashNoNonce()} }
+
+func (b *Block) GetHeader() *Header             { return &Header{b.block.Header()} }
+func (b *Block) GetUncles() *Headers            { return &Headers{b.block.Uncles()} }
+func (b *Block) GetTransactions() *Transactions { return &Transactions{b.block.Transactions()} }
+func (b *Block) GetTransaction(hash *Hash) *Transaction {
+	return &Transaction{b.block.Transaction(hash.hash)}
+}
+
+// Transaction represents a single Ethereum transaction.
+type Transaction struct {
+	tx *types.Transaction
+}
+
+func (tx *Transaction) GetData() []byte      { return tx.tx.Data() }
+func (tx *Transaction) GetGas() int64        { return tx.tx.Gas().Int64() }
+func (tx *Transaction) GetGasPrice() *BigInt { return &BigInt{tx.tx.GasPrice()} }
+func (tx *Transaction) GetValue() *BigInt    { return &BigInt{tx.tx.Value()} }
+func (tx *Transaction) GetNonce() int64      { return int64(tx.tx.Nonce()) }
+
+func (tx *Transaction) GetHash() *Hash    { return &Hash{tx.tx.Hash()} }
+func (tx *Transaction) GetSigHash() *Hash { return &Hash{tx.tx.SigHash()} }
+func (tx *Transaction) GetCost() *BigInt  { return &BigInt{tx.tx.Cost()} }
+
+func (tx *Transaction) GetFrom() (*Address, error) {
+	from, err := tx.tx.From()
+	return &Address{from}, err
+}
+
+func (tx *Transaction) GetTo() *Address {
+	if to := tx.tx.To(); to != nil {
+		return &Address{*to}
+	}
+	return nil
+}
+
+func (tx *Transaction) WithSignature(sig []byte) (*Transaction, error) {
+	t, err := tx.tx.WithSignature(sig)
+	return &Transaction{t}, err
+}
+
+// Transactions represents a slice of transactions.
+type Transactions struct{ txs types.Transactions }
+
+// Size returns the number of transactions in the slice.
+func (t *Transactions) Size() int {
+	return len(t.txs)
+}
+
+// Get returns the transaction at the given index from the slice.
+func (t *Transactions) Get(index int) (*Transaction, error) {
+	if index < 0 || index >= len(t.txs) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Transaction{t.txs[index]}, nil
+}
+
+// Receipt represents the results of a transaction.
+type Receipt struct {
+	receipt *types.Receipt
+}
+
+func (r *Receipt) GetPostState() []byte          { return r.receipt.PostState }
+func (r *Receipt) GetCumulativeGasUsed() *BigInt { return &BigInt{r.receipt.CumulativeGasUsed} }
+func (r *Receipt) GetBloom() *Bloom              { return &Bloom{r.receipt.Bloom} }
+func (r *Receipt) GetLogs() *Logs                { return &Logs{r.receipt.Logs} }
+func (r *Receipt) GetTxHash() *Hash              { return &Hash{r.receipt.TxHash} }
+func (r *Receipt) GetContractAddress() *Address  { return &Address{r.receipt.ContractAddress} }
+func (r *Receipt) GetGasUsed() *BigInt           { return &BigInt{r.receipt.GasUsed} }

mobile/vm.go

@@ -0,0 +1,56 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Contains all the wrappers from the core/types package.
+
+package geth
+
+import (
+	"errors"
+
+	"github.com/ethereum/go-ethereum/core/vm"
+)
+
+// Log represents a contract log event. These events are generated by the LOG
+// opcode and stored/indexed by the node.
+type Log struct {
+	log *vm.Log
+}
+
+func (l *Log) GetAddress() *Address  { return &Address{l.log.Address} }
+func (l *Log) GetTopics() *Hashes    { return &Hashes{l.log.Topics} }
+func (l *Log) GetData() []byte       { return l.log.Data }
+func (l *Log) GetBlockNumber() int64 { return int64(l.log.BlockNumber) }
+func (l *Log) GetTxHash() *Hash      { return &Hash{l.log.TxHash} }
+func (l *Log) GetTxIndex() int       { return int(l.log.TxIndex) }
+func (l *Log) GetBlockHash() *Hash   { return &Hash{l.log.BlockHash} }
+func (l *Log) GetIndex() int         { return int(l.log.Index) }
+
+// Logs represents a slice of VM logs.
+type Logs struct{ logs vm.Logs }
+
+// Size returns the number of logs in the slice.
+func (l *Logs) Size() int {
+	return len(l.logs)
+}
+
+// Get returns the log at the given index from the slice.
+func (l *Logs) Get(index int) (*Log, error) {
+	if index < 0 || index >= len(l.logs) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Log{l.logs[index]}, nil
+}

p2p/discover/node.go

@@ -35,7 +35,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
 )
 
-const nodeIDBits = 512
+const NodeIDBits = 512
 
 // Node represents a host on the network.
 // The fields of Node may not be modified.
@@ -209,7 +209,7 @@ func MustParseNode(rawurl string) *Node {
 
 // NodeID is a unique identifier for each node.
 // The node identifier is a marshaled elliptic curve public key.
-type NodeID [nodeIDBits / 8]byte
+type NodeID [NodeIDBits / 8]byte
 
 // NodeID prints as a long hexadecimal number.
 func (n NodeID) String() string {

p2p/server.go

@@ -748,7 +748,7 @@ type NodeInfo struct {
 	Protocols  map[string]interface{} `json:"protocols"`
 }
 
-// Info gathers and returns a collection of metadata known about the host.
+// NodeInfo gathers and returns a collection of metadata known about the host.
 func (srv *Server) NodeInfo() *NodeInfo {
 	node := srv.Self()