From 97fffca3e63e2edb4818305abdbcbb8953344aa3 Mon Sep 17 00:00:00 2001
From: Adam Soltys <adam@coinos.io>
Date: Mon, 2 Mar 2026 22:50:42 -0800
Subject: fee bumping ui

---
 src/routes/(app)/payment/[id]/+page.svelte         | 113 ++++++++++++++++++++-
 .../(app)/payment/[id]/bump-estimate/+server.ts    |  12 +++
 src/routes/(app)/payment/[id]/bump/+server.ts      |   2 +-
 .../[amount]/[...feeRate]/+page.server.ts          |   3 +-
 .../[address]/[amount]/[...feeRate]/+page.svelte   |  83 ++++++++++++---
 5 files changed, 194 insertions(+), 19 deletions(-)
 create mode 100644 src/routes/(app)/payment/[id]/bump-estimate/+server.ts

(limited to 'src')

diff --git a/src/routes/(app)/payment/[id]/+page.svelte b/src/routes/(app)/payment/[id]/+page.svelte
index aad0cf7f..55daca8d 100644
--- a/src/routes/(app)/payment/[id]/+page.svelte
+++ b/src/routes/(app)/payment/[id]/+page.svelte
@@ -58,12 +58,53 @@
     success("Printing!");
   };
 
+  let showBump = $state(false);
+  let bumpLoading = $state(false);
+  let bumpEstimate: any = $state(null);
+  let bumpTargetRate = $state(0);
+  let bumpError = $state("");
+
+  let canBump = $derived(
+    type === "bitcoin" && !confirmed && amount < 0 && p.bumpReserve > 0 && !p.childTxid,
+  );
+
+  let fetchEstimate = async (targetRate: number) => {
+    bumpTargetRate = targetRate;
+    bumpError = "";
+    try {
+      bumpEstimate = await post(`/payment/${id}/bump-estimate`, { id, targetFeeRate: targetRate });
+    } catch (e: any) {
+      bumpError = e.message;
+    }
+  };
+
+  let openBump = async () => {
+    showBump = true;
+    bumpEstimate = null;
+    bumpError = "";
+    try {
+      const est = await post(`/payment/${id}/bump-estimate`, { id, targetFeeRate: 10 });
+      bumpEstimate = est;
+      bumpTargetRate = est.fees?.fastestFee || 10;
+      await fetchEstimate(bumpTargetRate);
+    } catch (e: any) {
+      bumpError = e.message;
+    }
+  };
+
   let bump = async () => {
+    bumpLoading = true;
+    bumpError = "";
     try {
-      await post(`/payment/${id}/bump`, { id });
+      const res = await post(`/payment/${id}/bump`, { id, targetFeeRate: bumpTargetRate });
+      p.childTxid = res.txid;
+      p.bumpedFee = res.childFee;
+      showBump = false;
+      success("Transaction bumped!");
     } catch (e: any) {
-      fail(e.message);
+      bumpError = e.message;
     }
+    bumpLoading = false;
   };
 
   let direction = $state("");
@@ -225,6 +266,74 @@
       </div>
     {/if}
 
+    {#if !confirmed && p.bumpReserve > 0}
+      {@render field("Bump Reserve (refundable)", p.bumpReserve)}
+    {/if}
+
+    {#if p.childTxid}
+      {@render copyable("Child Txid", p.childTxid, `${expl}/tx/${p.childTxid}`)}
+    {/if}
+
+    {#if canBump}
+      <div class="py-4 border-b border-base-300">
+        {#if !showBump}
+          <button type="button" class="btn btn-accent w-full" onclick={openBump}>
+            Speed up
+          </button>
+        {:else}
+          <div class="space-y-3">
+            <h3 class="font-semibold">Speed up transaction</h3>
+
+            {#if bumpEstimate?.fees}
+              <div class="flex flex-wrap gap-2 justify-center">
+                <button
+                  type="button"
+                  class="btn btn-sm"
+                  class:btn-accent={bumpTargetRate === bumpEstimate.fees.halfHourFee}
+                  onclick={() => fetchEstimate(bumpEstimate.fees.halfHourFee)}
+                >
+                  Fast ({bumpEstimate.fees.halfHourFee})
+                </button>
+                <button
+                  type="button"
+                  class="btn btn-sm"
+                  class:btn-accent={bumpTargetRate === bumpEstimate.fees.fastestFee}
+                  onclick={() => fetchEstimate(bumpEstimate.fees.fastestFee)}
+                >
+                  Fastest ({bumpEstimate.fees.fastestFee})
+                </button>
+              </div>
+
+              {#if bumpEstimate.cost !== undefined}
+                <div class="text-center text-sm">
+                  <span class="text-secondary">Cost:</span>
+                  {bumpEstimate.cost} sats from your {p.bumpReserve} sat reserve
+                </div>
+              {/if}
+            {/if}
+
+            {#if bumpError}
+              <div class="text-red-600 text-sm text-center">{bumpError}</div>
+            {/if}
+
+            <div class="flex gap-2 justify-center">
+              <button type="button" class="btn btn-sm" onclick={() => (showBump = false)}>
+                Cancel
+              </button>
+              <button
+                type="button"
+                class="btn btn-sm btn-accent"
+                onclick={bump}
+                disabled={bumpLoading || !bumpEstimate || bumpEstimate.cost > p.bumpReserve}
+              >
+                {bumpLoading ? "Bumping..." : "Confirm bump"}
+              </button>
+            </div>
+          </div>
+        {/if}
+      </div>
+    {/if}
+
     {#if type === types.lightning || type === types.bolt12}
       {@render copyable($t("payments.invoice"), hash)}
       {@render copyable($t("payments.preimage"), ref)}
diff --git a/src/routes/(app)/payment/[id]/bump-estimate/+server.ts b/src/routes/(app)/payment/[id]/bump-estimate/+server.ts
new file mode 100644
index 00000000..dc5a8642
--- /dev/null
+++ b/src/routes/(app)/payment/[id]/bump-estimate/+server.ts
@@ -0,0 +1,12 @@
+import { auth, post } from "$lib/utils";
+import { json, error } from "@sveltejs/kit";
+
+export async function POST({ cookies, request }) {
+  const body = await request.json();
+  try {
+    const res = await post("/bump/estimate", body, auth(cookies));
+    return json(res);
+  } catch (e: any) {
+    error(400, e.message);
+  }
+}
diff --git a/src/routes/(app)/payment/[id]/bump/+server.ts b/src/routes/(app)/payment/[id]/bump/+server.ts
index b24980a0..275df1be 100644
--- a/src/routes/(app)/payment/[id]/bump/+server.ts
+++ b/src/routes/(app)/payment/[id]/bump/+server.ts
@@ -4,7 +4,7 @@ import { json, error } from "@sveltejs/kit";
 export async function POST({ cookies, request }) {
   const body = await request.json();
   try {
-    const res = await post("/replace", body, auth(cookies));
+    const res = await post("/bump", body, auth(cookies));
     return json(res);
   } catch (e: any) {
     error(400, e.message);
diff --git a/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.server.ts b/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.server.ts
index 717b5a4c..54891aad 100644
--- a/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.server.ts
+++ b/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.server.ts
@@ -31,7 +31,7 @@ export async function load({ params: { address, amount, feeRate }, cookies, pare
   }
 
   try {
-    const { fee, fees, inputs, ourfee, hex, subtract } = await post(
+    const { fee, fees, inputs, ourfee, hex, subtract, bumpReserve } = await post(
       "/bitcoin/fee",
       { address, amount, feeRate, aid },
       auth(cookies),
@@ -50,6 +50,7 @@ export async function load({ params: { address, amount, feeRate }, cookies, pare
       hex,
       inputs,
       forward,
+      bumpReserve,
     };
   } catch (e) {
     const { message } = e as Error;
diff --git a/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte b/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte
index 246cc824..fcae8598 100644
--- a/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte
+++ b/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte
@@ -129,7 +129,7 @@
 
   let toggle = () => (submitting = !submitting);
 
-  let { account, amount, address, message, fee, fees, subtract, ourfee, hex, inputs, forward } =
+  let { account, amount, address, message, fee, fees, subtract, ourfee, hex, inputs, forward, bumpReserve } =
     $derived(data);
 
   let feeRate: any = $state((() => data.feeRate)());
@@ -152,16 +152,34 @@
     submit: any = $state(),
     showSettings = $state();
 
-  let feeNames = {
-    fastestFee: $t("payments.fastest"),
-    halfHourFee: $t("payments.fast"),
-    hourFee: $t("payments.medium"),
-  };
+  let customRate = $state("");
+  let showCustom = $state(false);
+
+  let presets = $derived(fees ? [
+    { label: $t("payments.economy"), rate: 0.1 },
+    { label: $t("payments.medium"), rate: fees.hourFee },
+    { label: $t("payments.fast"), rate: fees.halfHourFee },
+    { label: $t("payments.fastest"), rate: fees.fastestFee },
+  ] : []);
 
   let toggleSettings = () => (showSettings = !showSettings);
 
   let setFee = () => goto(`/send/bitcoin/${address}/${amount}/${feeRate}`);
   let goBack = () => goto(`/send/bitcoin/${address}`);
+
+  let pickRate = (r: number) => {
+    feeRate = r;
+    showCustom = false;
+    setFee();
+  };
+
+  let applyCustom = () => {
+    const r = parseFloat(customRate);
+    if (r >= 0.1) {
+      feeRate = r;
+      setFee();
+    }
+  };
 </script>
 
 <div class="container px-4 max-w-xl mx-auto space-y-5 text-center no-transition">
@@ -187,18 +205,53 @@
       <div class="text-center">
         <h2 class="text-secondary text-lg">{$t("payments.networkFee")}</h2>
 
-        <div class="flex flex-wrap gap-4 justify-center">
-          <select bind:value={feeRate} onchange={setFee}>
-            {#each Object.keys(feeNames) as feeName}
-              <option value={fees[feeName]}>
-                {feeNames[feeName]} &mdash; {fees[feeName]} sats/vb
-              </option>
-            {/each}
-          </select>
-          <Amount amount={fee} rate={$rate} {currency} {locale} />
+        <div class="flex flex-wrap gap-2 justify-center mb-2">
+          {#each presets as preset}
+            <button
+              type="button"
+              class="btn btn-sm"
+              class:btn-accent={feeRate == preset.rate && !showCustom}
+              onclick={() => pickRate(preset.rate)}
+            >
+              {preset.label} ({preset.rate})
+            </button>
+          {/each}
+          <button
+            type="button"
+            class="btn btn-sm"
+            class:btn-accent={showCustom}
+            onclick={() => { showCustom = true; customRate = String(feeRate); }}
+          >
+            Custom
+          </button>
         </div>
+
+        {#if showCustom}
+          <div class="flex items-center justify-center gap-2 mb-2">
+            <input
+              type="number"
+              min="0.1"
+              step="0.1"
+              class="input input-bordered w-24 text-center"
+              bind:value={customRate}
+              onblur={applyCustom}
+              onkeydown={(e) => e.key === 'Enter' && applyCustom()}
+            />
+            <span class="text-secondary text-sm">sat/vB</span>
+          </div>
+        {/if}
+
+        <Amount amount={fee} rate={$rate} {currency} {locale} />
       </div>
 
+      {#if bumpReserve > 0}
+        <div class="text-center">
+          <h2 class="text-secondary text-lg">Bump Reserve</h2>
+          <div class="text-sm text-secondary">Refundable on confirmation</div>
+          <Amount amount={bumpReserve} rate={$rate} {currency} {locale} />
+        </div>
+      {/if}
+
       {#if ourfee}
         <div class="text-center">
           <h2 class="text-secondary text-lg">{$t("payments.platformFee")}</h2>
-- 
cgit v1.2.3