fix: std.Address validation

gno.land/cmd/gnoland/testdata/pr-1799.txtar

@@ -0,0 +1,12 @@
+# Test for https://github.com/gnolang/gno/pull/xxxx
+loadpkg gno.land/r/demo/foo20
+
+gnoland start
+
+# execute Faucet
+gnokey maketx call -pkgpath gno.land/r/demo/foo20 -func Faucet -gas-fee 1000000ugnot -gas-wanted 2000000 -broadcast -chainid=tendermint_test test1
+stdout 'OK!'
+
+# execute Transfer for invalid address
+! gnokey maketx call -pkgpath gno.land/r/demo/foo20 -func Transfer -args g1ubwj0apf60hd90txhnh855fkac34rxlsvua0aa -args 1 -gas-fee 1000000ugnot -gas-wanted 2000000 -broadcast -chainid=tendermint_test test1
+stderr '"gnokey" error: --= Error =--\nData: invalid address'

gnovm/stdlibs/std/crypto.gno

@@ -6,9 +6,10 @@ func (a Address) String() string {
 	return string(a)
 }
 
-// IsValid checks if the address is of specific length. Doesn't check prefix or checksum for the address
+// IsValid checks if the address is valid bech32 encoded string
 func (a Address) IsValid() bool {
-	return len(a) == RawAddressSize*2 // hex length
+	_, _, ok := decodeBech32(a.String())
+	return ok
 }
 
 const RawAddressSize = 20

gnovm/stdlibs/stdshim/crypto.gno

@@ -6,9 +6,10 @@ func (a Address) String() string {
 	return string(a)
 }
 
-// IsValid checks if the address is of specific length. Doesn't check prefix or checksum for the address
+// IsValid checks if the address is valid bech32 encoded string
 func (a Address) IsValid() bool {
-	return len(a) == RawAddressSize*2 // hex length
+	_, _, ok := decodeBech32(a.String())
+	return ok
 }
 
 const RawAddressSize = 20