fix: replace zap slider with common amount pills

src/app/components/Zap.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import cx from "classnames"
   import type {NativeEmoji} from "emoji-picker-element/shared"
   import {signer, deriveZapperForPubkey} from "@welshman/app"
   import {load} from "@welshman/net"
@@ -20,6 +21,7 @@
   import {errorMessage} from "@lib/util"
   import ProfileLink from "@app/components/ProfileLink.svelte"
   import {payInvoice} from "@app/lightning"
+  import {zapAmounts} from "@app/settings"
   import {pushToast} from "@app/toast"
 
   type Props = {
@@ -30,31 +32,14 @@
 
   const {url, pubkey, eventId}: Props = $props()
 
-  const minPos = 1
-  const maxPos = 1000
-  const minVal = 21
-  const maxVal = 1000000
   const zapperStore = deriveZapperForPubkey(pubkey)
 
-  const posToAmount = (pos: number) => {
-    const normalizedPos = (pos - minPos) / (maxPos - minPos)
-    const logMin = Math.log(minVal)
-    const logMax = Math.log(maxVal)
-    const logValue = logMin + normalizedPos * (logMax - logMin)
-    return Math.round(Math.exp(logValue))
-  }
-
-  const amountToPos = (amount: number) => {
-    const clampedAmount = Math.max(minVal, Math.min(maxVal, amount))
-    const logMin = Math.log(minVal)
-    const logMax = Math.log(maxVal)
-    const logValue = Math.log(clampedAmount)
-    const normalizedPos = (logValue - logMin) / (logMax - logMin)
-    return Math.round(minPos + normalizedPos * (maxPos - minPos))
-  }
-
   const back = () => history.back()
 
+  const selectAmount = (preset: number) => {
+    amount = preset
+  }
+
   const onEmoji = (emoji: NativeEmoji) => {
     content = emoji.unicode
   }
@@ -97,21 +82,9 @@
     }
   }
 
-  let pos = $state(minPos)
+  let amount = $state(zapAmounts.get()[0])
-  let amount = $state(minVal)
   let content = $state("⚡️")
   let loading = $state(false)
-
-  $effect(() => {
-    amount = posToAmount(pos)
-  })
-
-  $effect(() => {
-    const newPos = amountToPos(amount)
-    if (newPos !== pos) {
-      pos = newPos
-    }
-  })
 </script>
 
 <Modal>
@@ -145,12 +118,15 @@
         </div>
       {/snippet}
     </FieldInline>
-    <input
+    <div class="flex flex-wrap justify-end gap-2">
-      class="range range-primary -mt-2"
+      {#each $zapAmounts as preset}
-      type="range"
+        <Button
-      min={minPos}
+          class={cx("btn btn-sm rounded-full", preset === amount ? "btn-primary" : "btn-neutral")}
-      max={maxPos}
+          onclick={() => selectAmount(preset)}>
-      bind:value={pos} />
+          {preset}
+        </Button>
+      {/each}
+    </div>
   </ModalBody>
   <ModalFooter>
     <Button class="btn btn-link" onclick={back}>

src/app/components/ZapInvoice.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
   import {onDestroy} from "svelte"
+  import cx from "classnames"
   import type {NativeEmoji} from "emoji-picker-element/shared"
   import {signer, deriveZapperForPubkey} from "@welshman/app"
   import {request} from "@welshman/net"
@@ -24,6 +25,7 @@
   import QRCode from "@app/components/QRCode.svelte"
   import WalletConnect from "@app/components/WalletConnect.svelte"
   import {pushModal} from "@app/modal"
+  import {zapAmounts} from "@app/settings"
   import {clip, pushToast} from "@app/toast"
 
   type Props = {
@@ -34,31 +36,14 @@
 
   const {url, pubkey, eventId}: Props = $props()
 
-  const minPos = 1
-  const maxPos = 1000
-  const minVal = 21
-  const maxVal = 1000000
   const zapperStore = deriveZapperForPubkey(pubkey)
 
-  const posToAmount = (pos: number) => {
-    const normalizedPos = (pos - minPos) / (maxPos - minPos)
-    const logMin = Math.log(minVal)
-    const logMax = Math.log(maxVal)
-    const logValue = logMin + normalizedPos * (logMax - logMin)
-    return Math.round(Math.exp(logValue))
-  }
-
-  const amountToPos = (amount: number) => {
-    const clampedAmount = Math.max(minVal, Math.min(maxVal, amount))
-    const logMin = Math.log(minVal)
-    const logMax = Math.log(maxVal)
-    const logValue = Math.log(clampedAmount)
-    const normalizedPos = (logValue - logMin) / (logMax - logMin)
-    return Math.round(minPos + normalizedPos * (maxPos - minPos))
-  }
-
   const back = () => history.back()
 
+  const selectAmount = (preset: number) => {
+    amount = preset
+  }
+
   const onEmoji = (emoji: NativeEmoji) => {
     content = emoji.unicode
   }
@@ -120,8 +105,7 @@
     }
   }
 
-  let pos = $state(minPos)
+  let amount = $state(zapAmounts.get()[0])
-  let amount = $state(minVal)
   let content = $state("⚡️")
   let loading = $state(false)
   let invoice = $state<string>()
@@ -130,17 +114,6 @@
   onDestroy(() => {
     paymentController?.abort()
   })
-
-  $effect(() => {
-    amount = posToAmount(pos)
-  })
-
-  $effect(() => {
-    const newPos = amountToPos(amount)
-    if (newPos !== pos) {
-      pos = newPos
-    }
-  })
 </script>
 
 <Modal>
@@ -189,12 +162,15 @@
           </div>
         {/snippet}
       </FieldInline>
-      <input
+      <div class="flex flex-wrap justify-end gap-2">
-        class="range range-primary -mt-2"
+        {#each $zapAmounts as preset}
-        type="range"
+          <Button
-        min={minPos}
+            class={cx("btn btn-sm rounded-full", preset === amount ? "btn-primary" : "btn-neutral")}
-        max={maxPos}
+            onclick={() => selectAmount(preset)}>
-        bind:value={pos} />
+            {preset}
+          </Button>
+        {/each}
+      </div>
       <p class="card2 card-sm bg-alt text-center flex justify-between items-center">
         Want to zap directly?
         <Button class="btn btn-neutral btn-sm" onclick={connectWallet}>

src/app/settings.ts

@@ -109,6 +109,10 @@ export const notificationSettings = withGetter(
   }),
 )
 
+export const defaultZapAmounts = [21, 210, 2100, 21000]
+
+export const zapAmounts = withGetter(writable([...defaultZapAmounts]))
+
 export const makeSettings = async (params: Partial<SettingsValues>) => {
   const json = JSON.stringify({...get(userSettingsValues), ...params})
   const content = await signer.get().nip44.encrypt(pubkey.get()!, json)

src/routes/+layout.svelte

@@ -35,7 +35,7 @@
   import {authPolicy, blockPolicy, trustPolicy, mostlyRestrictedPolicy} from "@app/policies"
   import {db, kv, ss} from "@app/storage"
   import {device} from "@app/device"
-  import {getSetting, userSettingsValues, notificationSettings} from "@app/settings"
+  import {getSetting, userSettingsValues, notificationSettings, zapAmounts} from "@app/settings"
   import {DUFFLEPUD_URL, INDEXER_RELAYS, POMADE_SIGNERS} from "@app/env"
   import {pushState} from "@app/push/adapters/common"
   import {syncApplicationData} from "@app/sync"
@@ -200,6 +200,11 @@
         store: notificationSettings,
         storage: kv,
       }),
+      sync({
+        key: "zapAmounts",
+        store: zapAmounts,
+        storage: kv,
+      }),
       sync({
         key: "notificationState",
         store: pushState,

src/routes/settings/wallet/+page.svelte

@@ -1,12 +1,17 @@
 <script lang="ts">
   import cx from "classnames"
-  import {LOCALE, always, call, sleep} from "@welshman/lib"
+  import {LOCALE, always, call, removeAt, replaceAt, sleep} from "@welshman/lib"
   import {WalletType, displayRelayUrl, isNWCWallet, fromMsats} from "@welshman/util"
   import {session, pubkey, profilesByPubkey} from "@welshman/app"
   import DownloadMinimalistic from "@assets/icons/download-minimalistic.svg?dataurl"
   import UploadMinimalistic from "@assets/icons/upload-minimalistic.svg?dataurl"
+  import Bolt from "@assets/icons/bolt.svg?dataurl"
+  import AddCircle from "@assets/icons/add-circle.svg?dataurl"
+  import TrashBin2 from "@assets/icons/trash-bin-2.svg?dataurl"
+  import {preventDefault} from "@lib/html"
   import Icon from "@lib/components/Icon.svelte"
   import Button from "@lib/components/Button.svelte"
+  import Spinner from "@lib/components/Spinner.svelte"
   import WalletPay from "@app/components/WalletPay.svelte"
   import WalletReceive from "@app/components/WalletReceive.svelte"
   import WalletConnect from "@app/components/WalletConnect.svelte"
@@ -14,9 +19,10 @@
   import WalletUpdateReceivingAddress from "@app/components/WalletUpdateReceivingAddress.svelte"
   import {pushModal} from "@app/modal"
   import {getNwcClient, getWebLn} from "@app/lightning"
+  import {zapAmounts} from "@app/settings"
+  import {pushToast} from "@app/toast"
   import Wallet2 from "@assets/icons/wallet.svg?dataurl"
   import CheckCircle from "@assets/icons/check-circle.svg?dataurl"
-  import AddCircle from "@assets/icons/add-circle.svg?dataurl"
   import CloseCircle from "@assets/icons/close-circle.svg?dataurl"
   import InfoCircle from "@assets/icons/info-circle.svg?dataurl"
 
@@ -78,6 +84,52 @@
   $effect(() => {
     startWalletStatusCheck($session?.wallet)
   })
+
+  const resetZapAmounts = () => {
+    zapAmountDraft = [...zapAmounts.get()]
+  }
+
+  const addZapAmount = () => {
+    zapAmountDraft = [...zapAmountDraft, zapAmountDraft.at(-1) || 21]
+  }
+
+  const removeZapAmount = (index: number) => {
+    if (zapAmountDraft.length > 1) {
+      zapAmountDraft = removeAt(index, zapAmountDraft)
+    }
+  }
+
+  const onZapAmountInput = (e: Event) => {
+    const target = e.currentTarget as HTMLInputElement
+    const index = Number(target.dataset.index)
+
+    zapAmountDraft = replaceAt(index, Number(target.value), zapAmountDraft)
+  }
+
+  const onZapAmountsSubmit = preventDefault(() => {
+    zapAmountsLoading = true
+
+    try {
+      const amounts = zapAmountDraft.filter(amount => amount > 0)
+
+      if (amounts.length === 0) {
+        return pushToast({
+          theme: "error",
+          message: "Add at least one zap amount greater than zero.",
+        })
+      }
+
+      zapAmounts.set(amounts)
+      zapAmountDraft = [...amounts]
+
+      pushToast({message: "Your zap amounts have been saved!"})
+    } finally {
+      zapAmountsLoading = false
+    }
+  })
+
+  let zapAmountDraft = $state([...zapAmounts.get()])
+  let zapAmountsLoading = $state(false)
 </script>
 
 <div class="content column gap-4">
@@ -206,4 +258,50 @@
       </div>
     {/if}
   </div>
+  <form class="card2 bg-alt flex flex-col gap-6 shadow-md" onsubmit={onZapAmountsSubmit}>
+    <strong class="flex items-center gap-3 text-lg">
+      <Icon icon={Bolt} />
+      Zap Amounts
+    </strong>
+    <p class="text-sm opacity-75">Preset amounts shown when sending a zap.</p>
+    <div class="flex flex-col gap-2">
+      {#each zapAmountDraft as amount, index}
+        <div class="flex items-center gap-2">
+          <Button
+            class="btn btn-ghost btn-sm"
+            type="button"
+            onclick={() => removeZapAmount(index)}
+            disabled={zapAmountDraft.length === 1}>
+            <Icon icon={TrashBin2} />
+          </Button>
+          <label class="input input-bordered flex grow items-center gap-2">
+            <Icon icon={Bolt} />
+            <input
+              type="number"
+              class="grow"
+              min="1"
+              data-index={index}
+              value={amount}
+              oninput={onZapAmountInput} />
+          </label>
+        </div>
+      {/each}
+      <Button class="btn btn-link w-fit px-0" type="button" onclick={addZapAmount}>
+        <Icon icon={AddCircle} size={5} />
+        Add amount
+      </Button>
+    </div>
+    <div class="flex flex-row items-center justify-between gap-4">
+      <Button
+        class="btn btn-neutral"
+        type="button"
+        onclick={resetZapAmounts}
+        disabled={zapAmountsLoading}>
+        Discard Changes
+      </Button>
+      <Button type="submit" class="btn btn-primary" disabled={zapAmountsLoading}>
+        <Spinner loading={zapAmountsLoading}>Save Changes</Spinner>
+      </Button>
+    </div>
+  </form>
 </div>