Start work on wallet API

wallet.go

@@ -0,0 +1,71 @@
+package keybase
+
+import (
+	"encoding/json"
+	"os/exec"
+)
+
+// ---- Struct for sending to API
+type walletOut struct {
+	Method string `json:"method"`
+}
+
+// ----
+
+// ---- Struct for data received after sending to API
+type walletOutResult struct {
+	Result []WalletResult `json:"result"`
+}
+type asset struct {
+	Type           string `json:"type"`
+	Code           string `json:"code"`
+	Issuer         string `json:"issuer"`
+	VerifiedDomain string `json:"verifiedDomain"`
+	IssuerName     string `json:"issuerName"`
+	Desc           string `json:"desc"`
+	InfoURL        string `json:"infoUrl"`
+}
+type balance struct {
+	Asset  asset  `json:"asset"`
+	Amount string `json:"amount"`
+	Limit  string `json:"limit"`
+}
+type exchangeRate struct {
+	Currency string `json:"currency"`
+	Rate     string `json:"rate"`
+}
+type WalletResult struct {
+	AccountID    string       `json:"accountID"`
+	IsPrimary    bool         `json:"isPrimary"`
+	Name         string       `json:"name"`
+	Balance      []balance    `json:"balance"`
+	ExchangeRate exchangeRate `json:"exchangeRate"`
+	AccountMode  int          `json:"accountMode"`
+}
+
+// ----
+
+// walletAPIOut() sends JSON requests to the wallet API and returns its response.
+func walletAPIOut(keybasePath string, w walletOut) (walletOutResult, error) {
+	jsonBytes, _ := json.Marshal(w)
+
+	cmd := exec.Command(keybasePath, "wallet", "api", "-m", string(jsonBytes))
+	cmdOut, err := cmd.Output()
+	if err != nil {
+		return walletOutResult{}, err
+	}
+
+	var r walletOutResult
+	json.Unmarshal(cmdOut, &r)
+
+	return r, nil
+}
+
+// Balances() returns a list of all wallets on the current user's account, including their current balance.
+func (k Keybase) Balances() ([]WalletResult, error) {
+	m := walletOut{}
+	m.Method = "balances"
+
+	r, err := walletAPIOut(k.Path, m)
+	return r.Result, err
+}