mirror of
https://github.com/Such-Software/grin-lws.git
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jwinterm
d839b75a76
Building an end-to-end integration test (mock grin node → real tick() → SQLite store) surfaced the real dual-DB blockers in sqlx::Any — NOT the placeholder issue the review flagged: - Any truncates i64 -> i32 for SQLite (12345678900 -> -539222988), which would corrupt grin amounts. Store outputs.value as a decimal string, sum in Rust. (Probe-documented; other int columns are < 2^31 for decades.) - Any can't decode SQLite BOOLEAN; is_coinbase/spent are now INTEGER 0/1. - DEFAULT now() -> DEFAULT CURRENT_TIMESTAMP (portable). The integration test now proves the whole pipeline end-to-end on SQLite: node UTXO listing → view-only rewind (golden output) → store with value + key_id → correct balance → spend-by-absence reconcile → zero. One schema + one query set now serve both backends.
71 lines
3.6 KiB
SQL
71 lines
3.6 KiB
SQL
-- grin-lws initial schema.
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--
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-- This service is a REAL light-wallet-server: it holds a per-account output
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-- store keyed by each account's `rewind_hash` (a view credential) and a
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-- reorg-safe chain cursor. It NEVER stores a private/spend key — `rewind_hash`
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-- is view-only (it can recognize a wallet's outputs and read amounts, but
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-- cannot spend).
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--
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-- Dialect: runs as-is on BOTH PostgreSQL and SQLite (verified in a test).
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-- SQLite accepts the Postgres type names via its type-affinity rules
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-- (BIGINT/BOOLEAN/TIMESTAMPTZ), and the app binds `$N` placeholders through
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-- sqlx's `Any` driver, which SQLite accepts. `DEFAULT CURRENT_TIMESTAMP` is
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-- portable (unlike `now()`). `commit` is a reserved word, so it is always
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-- quoted as "commit".
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-- An account = one registered view credential.
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CREATE TABLE IF NOT EXISTS accounts (
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-- The wallet's rewind_hash (64 hex). View-only; safe to persist.
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rewind_hash TEXT PRIMARY KEY,
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-- The height the scanner should (re)start from when this account was added
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-- (a wallet birthday). Never advances backwards on its own.
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start_height BIGINT NOT NULL,
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-- How far the scanner has processed this account. Advances toward the tip;
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-- lowered only by an explicit backwards rescan.
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scan_height BIGINT NOT NULL,
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created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
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);
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-- Outputs the scanner recognized for a registered account (rewound rangeproof
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-- matched). Crucially stores the recovered derivation path (`key_id` /
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-- `n_child`) so a client can spend WITHOUT a client-side identify search.
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CREATE TABLE IF NOT EXISTS outputs (
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"commit" TEXT PRIMARY KEY,
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rewind_hash TEXT NOT NULL REFERENCES accounts(rewind_hash) ON DELETE CASCADE,
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-- nanogrin as a DECIMAL STRING. sqlx's `Any` driver truncates i64 -> i32
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-- for SQLite, which would corrupt amounts > ~2.1e9 (grin values reach
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-- ~1e16), so the value is stored as text and summed in Rust. Other integer
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-- columns stay well under 2^31 for decades.
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value TEXT NOT NULL,
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height BIGINT NOT NULL,
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mmr_index BIGINT NOT NULL,
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is_coinbase INTEGER NOT NULL DEFAULT 0, -- 0/1 (Any can't decode SQLite BOOLEAN)
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lock_height BIGINT NOT NULL DEFAULT 0,
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-- Recovered from the proof message during rewind (grin_recover_output
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-- equivalent, server-side). Enables direct spend by the client.
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key_id TEXT,
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n_child INTEGER,
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-- Spend tracking: set when this output's commitment appears as a tx input.
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spent INTEGER NOT NULL DEFAULT 0, -- 0/1 (Any can't decode SQLite BOOLEAN)
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spent_height BIGINT
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);
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-- Balance / unspent-set queries filter by (account, spent).
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CREATE INDEX IF NOT EXISTS idx_outputs_account_spent ON outputs (rewind_hash, spent);
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-- Spend detection matches an on-chain input commitment against stored outputs.
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CREATE INDEX IF NOT EXISTS idx_outputs_commit ON outputs ("commit");
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-- Single-row scanner cursor. Grin is scanned by walking the output PMMR in
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-- insertion-index order, so the resume point is an output index, not a block
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-- position. `height`/`block_hash` hold the chain tip last seen (the reorg-
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-- detection checkpoint). On a reorg the scanner rolls back rows above the fork
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-- and reseeks from there.
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CREATE TABLE IF NOT EXISTS chain_cursor (
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id INTEGER PRIMARY KEY CHECK (id = 1),
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-- Highest output PMMR index already scanned (forward-scan resume point).
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output_mmr_index BIGINT NOT NULL DEFAULT 0,
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-- Chain tip height + block hash at the last tick (reorg checkpoint).
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height BIGINT NOT NULL,
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block_hash TEXT NOT NULL
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);
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