Design: PVQ Program Metadata

types: type registry, encoded in scale-info registry format.

extension_fns: Check if the program is compatible with the current chain: Chains exposes supported extensions via pvq-extension-core, while front-end codes use the metadata and a prebuilt check program to run checks.

entrypoints: Multiple entrypoints function of a pvq program.

Example metadata

{ "types": { "types": [ { "id": 0, "type": { "def": { "primitive": "u32" } } }, { "id": 1, "type": { "def": { "array": { "len": 32, "type": 2 } } } }, { "id": 2, "type": { "def": { "primitive": "u8" } } }, { "id": 3, "type": { "def": { "primitive": "u64" } } }, { "id": 4, "type": { "def": { "sequence": { "type": 1 } } } } ] }, "extension_fns": [ [ 4071833530116166512, 1, { "name": "balance", "inputs": [ { "name": "asset", "ty": 0 }, { "name": "who", "ty": 1 } ], "output": 3 } ] ], "entrypoint": { "name": "sum_balance", "inputs": [ { "name": "asset", "ty": 0 }, { "name": "accounts", "ty": 4 } ], "output": 3 } }