Struct TypedValueJson 

pub struct TypedValueJson {
    pub value_type: String,
    pub value: MetaValueJson,
}

Tagged-union wire-format for a rustledger_core::MetaValue that preserves the host’s variant tag.

Used only in DirectiveJson::Custom’s values field, where callers genuinely need to distinguish (for example) a Date from a String or an Account — all three of which collapse to a bare JSON string under the untagged MetaValueJson shape.

Wire shape: {"type": "<variant>", "value": ...} — mirrors rustledger-ffi-wasi::TypedValue (see crates/rustledger-ffi-wasi/src/types/output.rs::TypedValue) so portable JS consumers see identical envelopes across both bindings.

Why value: MetaValueJson and not serde_json::Value — serde_json is intentionally a host-only dev-dependency for this crate (the runtime build avoids it to keep the wasm32 dep chain small). MetaValueJson already covers every payload shape FFI-WASI’s TypedValue emits: String for the string-flavored variants, Bool for bool, Amount for amount, Null for null. The serialized JSON is bit-identical to FFI-WASI’s.

MetaValueJson (untagged) is retained for the meta map of every directive — there the lossy shape is intentional and matches what FFI-WASI’s metadata side also emits.

Breaking change from #1199 for the WASM binding: pre-#1207 Custom.values emitted raw MetaValueJson values (lossy). Closes #1207.

Fields

value_type: String

Variant tag — one of "string", "account", "currency", "tag", "link", "date", "number", "bool", "amount", "null". Matches FFI-WASI’s tag strings exactly.

Renamed via #[ts(type = ...)] so the discriminator is a string-literal union on the TS side. The post-process script further narrows the full struct shape into a discriminated union (per-variant {type, value} rows) – see ADR-0004 for why the narrowing is hand-tuned rather than generator-driven.

value: MetaValueJson

Variant payload (see MetaValueJson for the four shapes).

Trait Implementations

impl Clone for TypedValueJson

fn clone(&self) -> TypedValueJson

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TypedValueJson

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TypedValueJson

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for TypedValueJson

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.