[accounts] Expose internal Address value, parsing (#1734)

accounts/address.go

@@ -0,0 +1,42 @@
+package accounts
+
+import (
+	"github.com/harmony-one/harmony/internal/bech32"
+	"github.com/harmony-one/harmony/internal/common"
+	"github.com/pkg/errors"
+)
+
+// ParseAddrH is a wrapper to cast ethCommon.Address to harmony's common.Address
+func ParseAddrH(s string) common.Address {
+	return common.Address(common.ParseAddr(s))
+}
+
+// MustBech32ToAddressH is a wrapper for casting ethCommon.Address to harmony's common.Address
+func MustBech32ToAddressH(b32 string) common.Address {
+	return common.Address(common.MustBech32ToAddress(b32))
+}
+
+// Bech32ToAddressH decodes the given bech32 address.
+func Bech32ToAddressH(b32 string) (addr common.Address, err error) {
+	var hrp string
+	err = ParseBech32AddrH(b32, &hrp, &addr)
+	if err == nil && hrp != common.Bech32AddressHRP {
+		err = errors.Errorf("%#v is not a %#v address", b32, common.Bech32AddressHRP)
+	}
+	return
+}
+
+// ParseBech32AddrH is another wrapper
+func ParseBech32AddrH(b32 string, hrp *string, addr *common.Address) error {
+	h, b, err := bech32.DecodeAndConvert(b32)
+	if err != nil {
+		return errors.Wrapf(err, "cannot decode %#v as bech32 address", b32)
+	}
+	if len(b) != common.AddressLength {
+		return errors.Errorf("decoded bech32 %#v has invalid length %d",
+			b32, len(b))
+	}
+	*hrp = h
+	addr.SetBytes(b)
+	return nil
+}