diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..1f2b05c
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+  "nuxt.isNuxtApp": false
+}
\ No newline at end of file
diff --git a/pkg/currency/currency.go b/pkg/currency/currency.go
new file mode 100644
index 0000000..30bf6bf
--- /dev/null
+++ b/pkg/currency/currency.go
@@ -0,0 +1,15 @@
+package currency
+
+type CurrencyOptions struct {
+	ContractAddress string
+	Decimal         int
+}
+
+type Currency struct {
+	Symbol  string
+	Options CurrencyOptions
+}
+
+func NewCurrency(symbol string, options CurrencyOptions) *Currency {
+	return &Currency{}
+}
diff --git a/pkg/network/evm.go b/pkg/network/evm.go
new file mode 100644
index 0000000..518e415
--- /dev/null
+++ b/pkg/network/evm.go
@@ -0,0 +1,8 @@
+package network
+
+type EVM struct {
+}
+
+func NewEVM() Network {
+	return &EVM{}
+}
diff --git a/pkg/network/network.go b/pkg/network/network.go
new file mode 100644
index 0000000..cea7fa8
--- /dev/null
+++ b/pkg/network/network.go
@@ -0,0 +1,4 @@
+package network
+
+type Network interface {
+}
diff --git a/pkg/network/tron.go b/pkg/network/tron.go
new file mode 100644
index 0000000..df106ca
--- /dev/null
+++ b/pkg/network/tron.go
@@ -0,0 +1,8 @@
+package network
+
+type TRON struct {
+}
+
+func NewTRON() Network {
+	return &TRON{}
+}
diff --git a/pkg/wallet/key.go b/pkg/wallet/key.go
new file mode 100644
index 0000000..7c71287
--- /dev/null
+++ b/pkg/wallet/key.go
@@ -0,0 +1,9 @@
+package wallet
+
+type Key struct {
+	Opt *Options
+}
+
+func NewKey(opts ...Option) *Key {
+
+}
diff --git a/pkg/wallet/wallet.go b/pkg/wallet/wallet.go
new file mode 100644
index 0000000..d9abee2
--- /dev/null
+++ b/pkg/wallet/wallet.go
@@ -0,0 +1,36 @@
+package wallet
+
+type Option func(o *Options)
+
+type Options struct {
+	Mnemonic string
+	Index    uint32
+}
+
+type Wallet struct {
+	Options Options
+}
+
+func AddressIndex(i uint32) Option {
+	return func(o *Options) {
+		o.Index = i
+	}
+}
+
+func Mnemonic(mnemonic string) Option {
+	return func(o *Options) {
+		o.Mnemonic = mnemonic
+	}
+}
+
+func NewWallet(opts ...Option) *Wallet {
+	opt := Options{}
+
+	for _, o := range opts {
+		o(&opt)
+	}
+
+	return &Wallet{
+		Options: opt,
+	}
+}