Ryan Henry
0d22946a0e
Ship the TLS mesh, composer, Beaver/Yao/leaf MPC, prep/online paths, apps, and docs so the tree is pushable before elevating share_expr, security_mode, and prep resume. Co-authored-by: Cursor <cursoragent@cursor.com>
1.7 KiB
1.7 KiB
Programmability
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ELI5. A wildcard is a placeholder with the correction word not yet fixed. Assigning an input or a leaf is a Beaver multiplication against that placeholder: one blinded share is exchanged, then both parties write the same correction. An updatable leaf can be patched again the same way.
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Fill in a secret index or payload after the key exists, rewrite an updatable leaf, or commit to a vector before choosing which coordinate to open.
| Mechanism | What it does |
|---|---|
| [dpf::wildcard_value](@ref dpf/wildcard.hpp) | Placeholder input or leaf. Eval throws until you assign. |
| Leaf assign | compute_and_get_blinded_output_share, reconstruct_correction_word, async_assign_leaf, assign_cmp — see [wildcard assign](@ref wildcard_assign). |
| [dpf::updatable](@ref dpf/placement.hpp) | Beaver leaf so a later rewrite replaces the payload without regenerating the spine. |
| [dpf::ppvc](@ref ppvc_manual) | Point-programmable vector commitment: bind (Z/2^s Z)^n, then open one hidden coordinate (or the sum). |
[dpf::at](@ref dpf/placement.hpp) / idpf |
Plant values on public prefixes as well as the leaf. |
auto [k0, k1] = dpf::make_dpf(
std::uint8_t{12},
dpf::wildcard_value<std::uint32_t>{});
// assign the payload later; eval before assign throws
using scheme = dpf::ppvc<std::uint8_t, 8>;
const auto pp = scheme::setup();
const auto [com, st] = scheme::commit(pp);
const auto op = scheme::open(st, 0, 0x5a, std::uint8_t{40});
Go deeper: [guided tour — wildcards](@ref tour_outputs), [PPVC](@ref tour_ppvc), [PPVC manual](@ref ppvc_manual), [input types](@ref input_types), [output types](@ref output_types).