# keyval/resp-stringify Encode a Deft value as a RESP reply frame — the other half of `keyval/resp-parse`, for building server facades. ## Syntax

[keyval/resp-stringify $value ?proto]

## Parameters - `$value` — the value to encode - `$proto` — `2` or `3` (default `3`); any other number is an `%Err` Encoding (RESP3 / RESP2): strings and keywords → bulk string; integral numbers → `:` integer; floats → `,` double / bulk string; booleans → `#t`/`#f` / `:1`/`:0`; `nil` → `_` / `$-1`; vectors → array; sets → `~` / array; maps → `%` / flat array; `%Err{:message}` → `-error` line (both protocols). Map keys must be scalars and are written as bulk strings. ## Examples

[keyval/resp-stringify "hi"]                 # → "$2\r\nhi\r\n"
[keyval/resp-stringify 42]                   # → ":42\r\n"
[keyval/resp-stringify 3.5]                  # → ",3.5\r\n"
[keyval/resp-stringify true]                 # → "#t\r\n"
[keyval/resp-stringify %{ :k "v" }]          # → "%1\r\n$1\r\nk\r\n$1\r\nv\r\n"
[keyval/resp-stringify [err "boom"]]         # → "-boom\r\n"
[keyval/resp-stringify nil 2]                # → "$-1\r\n"

## Returns Encoded string; `%Err{:message}` for an unsupported value, an invalid `proto`, or a `%Err` without a string `:message` (`"ERR"` is substituted when one is missing). ## See Also `keyval/resp-parse`, `keyval/cmd`