Token Selector Modal

Search, popular chips and a keyboard-navigable token list.

Arrow keys move through the list; Enter picks. Search “zzz” for the empty state.

Installation

CLI

npx shadcn@latest add https://hantui-theta.vercel.app/r/token-selector-modal.json

Manual

Install the dependencies

npm install clsx lucide-react motion radix-ui tailwind-merge viem

Add the shared helpers

Components use cn() from lib/utils.ts and the motion tokens below. See Installation if you have not set them up yet.

lib/color.ts

export type Vec3 = [r: number, g: number, b: number];

/**
 * Parses #rgb, #rrggbb or #rrggbbaa (alpha is ignored) into 0–255 channels.
 * Anything else falls back to black, so a typo never crashes a shader.
 */
export function hexToRgb(hex: string): Vec3 {
  let value = hex.trim().replace(/^#/, "");
  if (value.length === 3 || value.length === 4) value = [...value.slice(0, 3)].map((c) => c + c).join("");
  if (!/^[\da-f]{6}([\da-f]{2})?$/i.test(value)) return [0, 0, 0];
  const n = Number.parseInt(value.slice(0, 6), 16);
  return [(n >> 16) & 255, (n >> 8) & 255, n & 255];
}

/** Hex color as a normalized vec3 (each channel 0–1) for shader uniforms. */
export function hexToVec3(hex: string): Vec3 {
  const [r, g, b] = hexToRgb(hex);
  return [r / 255, g / 255, b / 255];
}

/**
 * Any CSS color the browser understands (hex, rgb(), oklch(), color-mix() or a variable such as
 * `var(--primary)`) as 0–255 channels, computed in the context of `element` so theme variables
 * resolve. Hex takes a fast path; everything else is computed once per call, so cache the result
 * instead of calling this every frame. Browser only; unreadable values fall back to black.
 */
export function cssColorToRgb(color: string, element: Element): Vec3 {
  const value = color.trim();
  if (/^#[\da-f]{3,8}$/i.test(value)) return hexToRgb(value);
  // Children of a canvas still get computed styles, but a regular parent is the safer host.
  const host = element instanceof HTMLCanvasElement ? (element.parentElement ?? document.body) : element;
  const probe = document.createElement("span");
  probe.style.cssText = "position:absolute;width:0;height:0;overflow:hidden;visibility:hidden";
  probe.style.color = value;
  host.appendChild(probe);
  const computed = getComputedStyle(probe).color;
  probe.remove();
  // A 1×1 canvas turns any computed color space (oklch, color(srgb …)) into sRGB bytes.
  const ctx = document.createElement("canvas").getContext("2d", { willReadFrequently: true });
  if (!ctx) return [0, 0, 0];
  ctx.fillStyle = "#000";
  ctx.fillStyle = computed;
  ctx.fillRect(0, 0, 1, 1);
  const [r, g, b] = ctx.getImageData(0, 0, 1, 1).data;
  return [r, g, b];
}

/**
 * Calls `onChange` when the page theme may have changed: a class or data-theme change on <html> or
 * <body> (shadcn's `.dark`, next-themes, a data-theme switch) or a change of the OS color scheme.
 * Resolved colors are cached, so re-resolve them here. Browser only; returns the unsubscribe.
 */
export function observeTheme(onChange: () => void): () => void {
  const observer = new MutationObserver(onChange);
  const options = { attributes: true, attributeFilter: ["class", "data-theme"] };
  observer.observe(document.documentElement, options);
  if (document.body) observer.observe(document.body, options);
  const scheme = window.matchMedia("(prefers-color-scheme: dark)");
  scheme.addEventListener("change", onChange);
  return () => {
    observer.disconnect();
    scheme.removeEventListener("change", onChange);
  };
}

/** `cssColorToRgb` as a normalized vec3 (each channel 0–1) for shader uniforms. */
export function cssColorToVec3(color: string, element: Element): Vec3 {
  const [r, g, b] = cssColorToRgb(color, element);
  return [r / 255, g / 255, b / 255];
}

const toLinear = (c: number) => (c <= 0.04045 ? c / 12.92 : ((c + 0.055) / 1.055) ** 2.4);
const toGamma = (c: number) => (c <= 0.0031308 ? 12.92 * c : 1.055 * c ** (1 / 2.4) - 0.055);

/** 0–255 sRGB to OKLCH: lightness 0–1, chroma, hue in radians. */
export function rgbToOklch([r, g, b]: Vec3): Vec3 {
  const [lr, lg, lb] = [r, g, b].map((v) => toLinear(v / 255));
  const l = Math.cbrt(0.4122214708 * lr + 0.5363325363 * lg + 0.0514459929 * lb);
  const m = Math.cbrt(0.2119034982 * lr + 0.6806995451 * lg + 0.1073969566 * lb);
  const s = Math.cbrt(0.0883024619 * lr + 0.2817188376 * lg + 0.6299787005 * lb);
  const L = 0.2104542553 * l + 0.793617785 * m - 0.0040720468 * s;
  const A = 1.9779984951 * l - 2.428592205 * m + 0.4505937099 * s;
  const B = 0.0259040371 * l + 0.7827717662 * m - 0.808675766 * s;
  return [L, Math.hypot(A, B), Math.atan2(B, A)];
}

/** OKLCH back to 0–255 sRGB, clamped into gamut. */
export function oklchToRgb([L, C, h]: Vec3): Vec3 {
  const A = C * Math.cos(h);
  const B = C * Math.sin(h);
  const l = (L + 0.3963377774 * A + 0.2158037573 * B) ** 3;
  const m = (L - 0.1055613458 * A - 0.0638541728 * B) ** 3;
  const s = (L - 0.0894841775 * A - 1.291485548 * B) ** 3;
  const rgb = [4.0767416621 * l - 3.3077115913 * m + 0.2309699292 * s, -1.2684380046 * l + 2.6097574011 * m - 0.3413193965 * s, -0.0041960863 * l - 0.7034186147 * m + 1.707614701 * s];
  return rgb.map((v) => Math.round(Math.min(1, Math.max(0, toGamma(Math.min(1, Math.max(0, v))))) * 255)) as Vec3;
}

/**
 * Mixes two 0–255 colors in OKLCH, taking the short way around the hue circle, so midpoints keep
 * their chroma instead of turning muddy the way an RGB mix does.
 */
export function mixOklch(a: Vec3, b: Vec3, t: number): Vec3 {
  const [L1, C1, h1] = rgbToOklch(a);
  const [L2, C2, h2] = rgbToOklch(b);
  // A near-gray end has no meaningful hue: borrow the other end's.
  const ha = C1 < 0.02 ? h2 : h1;
  const hb = C2 < 0.02 ? h1 : h2;
  let dh = hb - ha;
  if (dh > Math.PI) dh -= Math.PI * 2;
  if (dh < -Math.PI) dh += Math.PI * 2;
  return oklchToRgb([L1 + (L2 - L1) * t, C1 + (C2 - C1) * t, ha + dh * t]);
}

lib/motion.ts

import type { Transition, Variants } from "motion/react";

/** Durations in seconds. */
export const duration = {
  instant: 0.1,
  quick: 0.18,
  base: 0.28,
  slow: 0.45,
} as const;

/** Cubic-bezier curves. */
export const ease = {
  /** Entering, UI response. */
  out: [0.22, 1, 0.36, 1],
  /** Moving on screen. */
  inOut: [0.65, 0, 0.35, 1],
  /** Sheets and the mobile menu. */
  drawer: [0.32, 0.72, 0, 1],
} as const;

/** Everyday UI: presses, icon swaps, popovers and modals. Exits run at `exitFactor` of the enter. */
export const ui = {
  press: { scale: 0.96, duration: 0.12 },
  icon: { type: "spring", duration: 0.3, bounce: 0 },
  popover: { duration: 0.18, ease: ease.out },
  modal: { duration: 0.24, ease: ease.out },
  exitFactor: 0.6,
} as const;

/** Once-per-visit motion on the landing page: hero letters, the reel and the afterimage. */
export const kinetic = {
  heroLetter: { duration: 0.6, ease: ease.out },
  /** Delay per letter, eased so the wave slows toward the end. */
  heroStep: 0.035,
  reelSwap: { type: "spring", duration: 0.5, bounce: 0.1 },
  /** Two afterimages: lag in seconds and opacity of each. */
  ghost: { lag: [0.04, 0.09], opacity: [0.14, 0.06] },
} as const;

/** Spring presets. */
export const spring = {
  snappy: { type: "spring", stiffness: 500, damping: 30 },
  smooth: { type: "spring", stiffness: 260, damping: 26 },
  bouncy: { type: "spring", stiffness: 300, damping: 15 },
} as const satisfies Record<string, Transition>;

/** Stagger between siblings, in seconds (0.03–0.06). */
export const stagger = {
  tight: 0.03,
  base: 0.045,
  loose: 0.06,
} as const;

/** Blur + fade + y-offset. Falls back to a plain fade under reduced motion. */
export function enterVariants(reduceMotion?: boolean | null, y = 8): Variants {
  if (reduceMotion) {
    return {
      hidden: { opacity: 0 },
      visible: { opacity: 1, transition: { duration: duration.base } },
      exit: { opacity: 0, transition: { duration: duration.quick } },
    };
  }
  return {
    hidden: { opacity: 0, y, filter: "blur(4px)" },
    visible: {
      opacity: 1,
      y: 0,
      filter: "blur(0px)",
      transition: { duration: duration.base, ease: ease.out },
    },
    exit: {
      opacity: 0,
      y: -y / 2,
      filter: "blur(4px)",
      transition: { duration: duration.quick, ease: ease.out },
    },
  };
}

/** Scale 0.96 → 1 for popovers, menus and dialogs. */
export function overlayVariants(reduceMotion?: boolean | null): Variants {
  if (reduceMotion) {
    return {
      hidden: { opacity: 0 },
      visible: { opacity: 1, transition: { duration: duration.quick } },
      exit: { opacity: 0, transition: { duration: duration.instant } },
    };
  }
  return {
    hidden: { opacity: 0, scale: 0.96, filter: "blur(2px)" },
    visible: {
      opacity: 1,
      scale: 1,
      filter: "blur(0px)",
      transition: { duration: duration.quick, ease: ease.out },
    },
    exit: {
      opacity: 0,
      scale: 0.96,
      filter: "blur(2px)",
      transition: { duration: duration.instant + 0.02, ease: ease.out },
    },
  };
}

/** Parent variants that stagger their children in. */
export function staggerVariants(gap: number = stagger.base, delayChildren = 0): Variants {
  return {
    hidden: {},
    visible: { transition: { staggerChildren: gap, delayChildren } },
    exit: { transition: { staggerChildren: gap / 2, staggerDirection: -1 } },
  };
}

lib/web3/format.ts

import { formatUnits, getAddress, isAddress, parseUnits } from "viem";

/**
 * Formatting for on-chain values. Amounts are always `bigint` plus `decimals`: nothing here
 * converts a balance to a float, so large or precise values never lose digits.
 */

/** Decimals used for USD values and prices across the web3 components (like Chainlink feeds). */
export const USD_DECIMALS = 8;

const COMPACT_UNITS = [
  { suffix: "T", exponent: 12 },
  { suffix: "B", exponent: 9 },
  { suffix: "M", exponent: 6 },
  { suffix: "K", exponent: 3 },
] as const;

function groupThousands(integer: string) {
  return integer.replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

function compact(value: bigint, decimals: number): string | null {
  const base = BigInt(10) ** BigInt(decimals);
  for (const { suffix, exponent } of COMPACT_UNITS) {
    const unit = base * BigInt(10) ** BigInt(exponent);
    if (value < unit) continue;
    const tenths = (value * BigInt(10)) / unit;
    const whole = tenths / BigInt(10);
    const fraction = tenths % BigInt(10);
    return `${groupThousands(whole.toString())}${fraction && whole < BigInt(100) ? `.${fraction}` : ""}${suffix}`;
  }
  return null;
}

export interface FormatAmountOptions {
  /** Most fraction digits shown; extra digits are cut, never rounded up. @default 4 */
  maxFractionDigits?: number;
  /** Fraction digits always shown (padded with zeros). @default 0 */
  minFractionDigits?: number;
  /** Abbreviate values of 1,000 and up: 1.2K, 3.4M, 5B. @default false */
  compact?: boolean;
  /** Prefix positive values with "+". @default false */
  signed?: boolean;
}

/**
 * Formats a token amount: `formatAmount(parseUnits("1.23456789", 18), 18)` → "1.2345".
 * Digits past `maxFractionDigits` are truncated so a balance is never overstated, and a tiny
 * non-zero amount shows as "<0.0001" instead of "0".
 */
export function formatAmount(value: bigint, decimals: number, options: FormatAmountOptions = {}) {
  const { maxFractionDigits = 4, minFractionDigits = 0, compact: useCompact = false, signed = false } = options;
  const negative = value < BigInt(0);
  const abs = negative ? -value : value;
  const sign = negative ? "-" : signed && abs > BigInt(0) ? "+" : "";

  const short = useCompact ? compact(abs, decimals) : null;
  if (short) return sign + short;

  const [integer, fraction = ""] = formatUnits(abs, decimals).split(".");
  let digits = fraction.slice(0, maxFractionDigits).replace(/0+$/, "");
  if (digits.length < minFractionDigits) digits = digits.padEnd(minFractionDigits, "0");

  if (abs > BigInt(0) && integer === "0" && !/[1-9]/.test(digits)) {
    return `${sign}<0.${"0".repeat(Math.max(0, maxFractionDigits - 1))}1`;
  }
  return `${sign}${groupThousands(integer)}${digits ? `.${digits}` : ""}`;
}

/** USD value of a token amount, as a bigint with `USD_DECIMALS` decimals. `price` uses the same decimals. */
export function toUsd(amount: bigint, tokenDecimals: number, price: bigint) {
  return (amount * price) / BigInt(10) ** BigInt(tokenDecimals);
}

/** Formats a USD bigint (default `USD_DECIMALS`): "$1,234.56", or "$1.2M" with `compact`. */
export function formatUsd(value: bigint, decimals = USD_DECIMALS, options: Omit<FormatAmountOptions, "maxFractionDigits"> = {}) {
  const { compact: useCompact = false, signed = false } = options;
  const negative = value < BigInt(0);
  const abs = negative ? -value : value;
  const sign = negative ? "-" : signed && abs > BigInt(0) ? "+" : "";
  // Under a cent, keep up to 6 significant fraction digits so token prices like $0.000042 stay readable.
  const tiny = abs > BigInt(0) && abs < BigInt(10) ** BigInt(Math.max(0, decimals - 2));
  const body = formatAmount(abs, decimals, {
    compact: useCompact,
    maxFractionDigits: tiny ? Math.min(decimals, 8) : 2,
    minFractionDigits: tiny ? 0 : 2,
  });
  return `${sign}$${body}`;
}

/** Formats a ratio as a percentage: `formatPercent(0.0123)` → "1.23%". */
export function formatPercent(ratio: number, options: { fractionDigits?: number; signed?: boolean } = {}) {
  const { fractionDigits = 2, signed = false } = options;
  if (!Number.isFinite(ratio)) return "—";
  const text = `${(Math.abs(ratio) * 100).toFixed(fractionDigits)}%`;
  if (ratio < 0) return `-${text}`;
  return signed && ratio > 0 ? `+${text}` : text;
}

/** Formats basis points (1 bp = 0.01%): `formatBps(BigInt(50))` → "0.5%". */
export function formatBps(bps: bigint | number) {
  const value = BigInt(bps);
  const abs = value < BigInt(0) ? -value : value;
  const fraction = abs % BigInt(100);
  return `${value < BigInt(0) ? "-" : ""}${abs / BigInt(100)}${fraction ? `.${fraction.toString().padStart(2, "0").replace(/0$/, "")}` : ""}%`;
}

/** Compact display for plain counts and non-token numbers: 1200 → "1.2K". */
export function compactNumber(value: number | bigint) {
  return new Intl.NumberFormat("en-US", { notation: "compact", maximumFractionDigits: 1 }).format(value);
}

/** EIP-55 checksummed address, or the input unchanged when it isn't a valid address. */
export function checksumAddress(address: string) {
  return isAddress(address, { strict: false }) ? getAddress(address) : address;
}

/** "0x1234…abcd": checksummed, with `start` characters (including 0x) and `end` characters kept. */
export function truncateAddress(address: string, { start = 6, end = 4 }: { start?: number; end?: number } = {}) {
  const value = checksumAddress(address);
  if (value.length <= start + end + 1) return value;
  return `${value.slice(0, start)}…${value.slice(-end)}`;
}

/**
 * Parses user input into a bigint amount. Accepts digits with one "." (commas are ignored),
 * cuts fraction digits past `decimals`, and returns null for anything that isn't a number.
 */
export function parseAmount(input: string, decimals: number): bigint | null {
  const text = input.replace(/,/g, "").trim();
  if (!/^\d*\.?\d*$/.test(text) || text === "" || text === ".") return null;
  const [integer, fraction = ""] = text.split(".");
  return parseUnits(`${integer || "0"}.${fraction.slice(0, decimals) || "0"}`, decimals);
}

/** A percentage of an amount, in whole percent: `percentOf(balance, 25)`. Rounds down. */
export function percentOf(amount: bigint, percent: number) {
  return (amount * BigInt(Math.round(percent * 100))) / BigInt(10_000);
}

lib/web3/icons.tsx

"use client";

import { useId, type ComponentProps } from "react";
import { hexToRgb } from "@/lib/color";
import { cn } from "@/lib/utils";

/**
 * Generated avatars for tokens, chains and accounts. No third-party logos are bundled:
 * pass `iconUrl` (tokens, chains) or `src` (accounts) to show your own artwork.
 */

const PALETTE = ["#6366F1", "#2563EB", "#0EA5E9", "#14B8A6", "#16A34A", "#F59E0B", "#EF4444", "#EC4899", "#8B5CF6", "#64748B"];

function hashString(value: string) {
  let hash = 0x811c9dc5;
  for (const char of value) hash = Math.imul(hash ^ char.charCodeAt(0), 0x01000193);
  return hash >>> 0;
}

/** Text color with enough contrast on a fill (relative luminance threshold). */
function inkFor(fill: string) {
  const [r, g, b] = hexToRgb(fill).map((c) => {
    const s = c / 255;
    return s <= 0.03928 ? s / 12.92 : ((s + 0.055) / 1.055) ** 2.4;
  });
  return 0.2126 * r + 0.7152 * g + 0.0722 * b > 0.45 ? "#09090B" : "#FFFFFF";
}

function Monogram({ text, fill, size, shape, className }: { text: string; fill: string; size: number; shape: "circle" | "squircle"; className?: string }) {
  const letters = text.slice(0, 4);
  const fontSize = letters.length <= 2 ? 13 : letters.length === 3 ? 10 : 8.5;
  return (
    <svg width={size} height={size} viewBox="0 0 32 32" aria-hidden="true" className={cn("shrink-0", className)}>
      {shape === "circle" ? <circle cx="16" cy="16" r="16" fill={fill} /> : <rect width="32" height="32" rx="9" fill={fill} />}
      <text
        x="16"
        y="16"
        dy="0.35em"
        textAnchor="middle"
        fontSize={fontSize}
        fontWeight={700}
        fill={inkFor(fill)}
        style={{ fontFamily: "inherit", letterSpacing: letters.length > 2 ? "-0.02em" : undefined }}
      >
        {letters}
      </text>
    </svg>
  );
}

function ImageIcon({ src, size, rounded, className }: { src: string; size: number; rounded: string; className?: string }) {
  // eslint-disable-next-line @next/next/no-img-element -- consumers pass arbitrary logo URLs
  return <img src={src} alt="" width={size} height={size} className={cn("shrink-0 object-cover", rounded, className)} />;
}

export interface TokenIconProps {
  token: { symbol: string; iconUrl?: string; color?: string };
  /** Pixel size. @default 24 */
  size?: number;
  className?: string;
}

/** A token's logo, or a colored circle with its symbol. Decorative: pair it with visible text. */
export function TokenIcon({ token, size = 24, className }: TokenIconProps) {
  if (token.iconUrl) return <ImageIcon src={token.iconUrl} size={size} rounded="rounded-full" className={className} />;
  const fill = token.color ?? PALETTE[hashString(token.symbol) % PALETTE.length];
  return <Monogram text={token.symbol} fill={fill} size={size} shape="circle" className={className} />;
}

export interface ChainIconProps {
  chain: { name: string; shortName?: string; iconUrl?: string; color?: string };
  /** Pixel size. @default 20 */
  size?: number;
  className?: string;
}

/** A chain's logo, or a rounded square with its initial. Decorative: pair it with visible text. */
export function ChainIcon({ chain, size = 20, className }: ChainIconProps) {
  if (chain.iconUrl) return <ImageIcon src={chain.iconUrl} size={size} rounded="rounded-[28%]" className={className} />;
  const fill = chain.color ?? PALETTE[hashString(chain.name) % PALETTE.length];
  return <Monogram text={(chain.shortName ?? chain.name).charAt(0)} fill={fill} size={size} shape="squircle" className={className} />;
}

export interface WalletIconProps {
  wallet: { name: string; iconUrl?: string; color?: string };
  /** Pixel size. @default 32 */
  size?: number;
  className?: string;
}

/** A wallet's logo, or a rounded square with its initial. Decorative: pair it with visible text. */
export function WalletIcon({ wallet, size = 32, className }: WalletIconProps) {
  if (wallet.iconUrl) return <ImageIcon src={wallet.iconUrl} size={size} rounded="rounded-[28%]" className={className} />;
  const fill = wallet.color ?? PALETTE[hashString(wallet.name) % PALETTE.length];
  return <Monogram text={wallet.name.charAt(0)} fill={fill} size={size} shape="squircle" className={className} />;
}

export interface AddressAvatarProps extends Omit<ComponentProps<"svg">, "children"> {
  address: string;
  /** Pixel size. @default 24 */
  size?: number;
}

/** A deterministic gradient avatar for an address: same address, same avatar, on every device. */
export function AddressAvatar({ address, size = 24, className, ...props }: AddressAvatarProps) {
  const id = useId();
  const hex = address.toLowerCase().replace(/^0x/, "").padEnd(40, "0");
  const byte = (i: number) => Number.parseInt(hex.slice(i * 2, i * 2 + 2), 16) || 0;
  const hue = Math.round((byte(0) / 255) * 360);
  const hue2 = (hue + 40 + Math.round((byte(1) / 255) * 120)) % 360;
  const angle = Math.round((byte(2) / 255) * 360);
  return (
    <svg width={size} height={size} viewBox="0 0 32 32" aria-hidden="true" className={cn("shrink-0 rounded-full", className)} {...props}>
      <defs>
        <linearGradient id={`${id}g`} gradientTransform={`rotate(${angle} 0.5 0.5)`}>
          <stop offset="0" stopColor={`hsl(${hue} 85% 64%)`} />
          <stop offset="1" stopColor={`hsl(${hue2} 80% 52%)`} />
        </linearGradient>
        <clipPath id={`${id}c`}>
          <circle cx="16" cy="16" r="16" />
        </clipPath>
      </defs>
      <g clipPath={`url(#${id}c)`}>
        <rect width="32" height="32" fill={`url(#${id}g)`} />
        <circle cx={6 + (byte(3) % 20)} cy={6 + (byte(4) % 20)} r={6 + (byte(5) % 6)} fill="#fff" opacity="0.32" />
        <circle cx={6 + (byte(6) % 20)} cy={6 + (byte(7) % 20)} r={3 + (byte(8) % 5)} fill="#fff" opacity="0.22" />
      </g>
    </svg>
  );
}

lib/web3/types.ts

/** Shapes the web3 components accept. Your own token and chain objects only need these fields. */

export interface Token {
  symbol: string;
  name?: string;
  /** Token decimals: 18 for ETH, 6 for USDC. Amounts are bigint in these units. */
  decimals: number;
  address?: string;
  /** Logo URL. Without one, a generated avatar (colored circle and symbol) is shown. */
  iconUrl?: string;
  /** Avatar color for the generated icon. Picked from the symbol when omitted. */
  color?: string;
  /** USD price as a bigint with USD_DECIMALS (8) decimals. */
  price?: bigint;
}

export interface Chain {
  id: number;
  name: string;
  shortName?: string;
  iconUrl?: string;
  color?: string;
  /** Block explorer base URL without a trailing slash, e.g. https://etherscan.io */
  explorerUrl?: string;
  nativeSymbol?: string;
}

export interface WalletOption {
  id: string;
  name: string;
  /** Logo URL. Without one, a generated squircle with the wallet's initial is shown. */
  iconUrl?: string;
  color?: string;
  /** Shows a "Recent" badge. */
  recent?: boolean;
  /** The wallet is detected in this browser. */
  installed?: boolean;
  /** Connects by scanning a QR code with a phone instead of a browser extension. */
  qr?: boolean;
  /** Short helper line under the name. */
  description?: string;
}

/** Lifecycle of anything the user signs: every state gets its own visual. */
export type TxStatus = "idle" | "awaiting-signature" | "pending" | "confirmed" | "failed";

/** Explorer URL for an address or transaction, or undefined without an explorer. */
export function explorerLink(explorerUrl: string | undefined, kind: "address" | "tx", value: string) {
  return explorerUrl ? `${explorerUrl.replace(/\/$/, "")}/${kind}/${value}` : undefined;
}

Copy the source

components/ui/token-selector-modal/token-selector-modal.tsx

"use client";

import { useId, useState, type KeyboardEvent, type ReactNode } from "react";
import { Dialog } from "radix-ui";
import { AnimatePresence, motion, useReducedMotion } from "motion/react";
import { Check, Search, X } from "lucide-react";
import { cn } from "@/lib/utils";
import { duration, ease, overlayVariants } from "@/lib/motion";
import { formatAmount, formatUsd, toUsd } from "@/lib/web3/format";
import { TokenIcon } from "@/lib/web3/icons";
import type { Token } from "@/lib/web3/types";

export interface TokenSelectorModalProps {
  /** Controlled open state. */
  open?: boolean;
  /** Initial open state when uncontrolled. @default false */
  defaultOpen?: boolean;
  /** Called when the dialog opens or closes. */
  onOpenChange?: (open: boolean) => void;
  /** Element that opens the dialog. */
  trigger?: ReactNode;
  /** Tokens to choose from. */
  tokens: Token[];
  /** Balances by token symbol, in each token's smallest unit. */
  balances?: Record<string, bigint>;
  /** Symbols offered as one-tap chips above the list. */
  popular?: string[];
  /** Symbol of the currently selected token (marked with a check). */
  selected?: string;
  /** Symbol that can't be picked, e.g. the other side of a swap. */
  disabledSymbol?: string;
  /** Called with the picked token; the dialog then closes. */
  onSelect: (token: Token) => void;
  /** Dialog title. @default "Select a token" */
  title?: string;
  /** Show skeleton rows while the token list loads. @default false */
  loading?: boolean;
}

const usdValue = (token: Token, balance?: bigint) =>
  balance !== undefined && token.price !== undefined ? toUsd(balance, token.decimals, token.price) : BigInt(0);

export function TokenSelectorModal({
  open,
  defaultOpen = false,
  onOpenChange,
  trigger,
  tokens,
  balances = {},
  popular = [],
  selected,
  disabledSymbol,
  onSelect,
  title = "Select a token",
  loading = false,
}: TokenSelectorModalProps) {
  const reduceMotion = useReducedMotion() ?? false;
  const listId = useId();
  const [internalOpen, setInternalOpen] = useState(defaultOpen);
  const [query, setQuery] = useState("");
  const [active, setActive] = useState(0);
  const isOpen = open ?? internalOpen;

  const setOpen = (next: boolean) => {
    if (open === undefined) setInternalOpen(next);
    onOpenChange?.(next);
    if (!next) {
      setQuery("");
      setActive(0);
    }
  };

  const q = query.trim().toLowerCase();
  const results = tokens
    .filter((t) => !q || t.symbol.toLowerCase().includes(q) || t.name?.toLowerCase().includes(q) || t.address?.toLowerCase() === q)
    .sort((a, b) => {
      const diff = usdValue(b, balances[b.symbol]) - usdValue(a, balances[a.symbol]);
      return diff > BigInt(0) ? 1 : diff < BigInt(0) ? -1 : a.symbol.localeCompare(b.symbol);
    });
  const activeIndex = Math.min(active, Math.max(0, results.length - 1));
  const popularTokens = popular.map((s) => tokens.find((t) => t.symbol === s)).filter((t): t is Token => Boolean(t));

  function choose(token: Token) {
    if (token.symbol === disabledSymbol) return;
    onSelect(token);
    setOpen(false);
  }

  function onKeyDown(event: KeyboardEvent<HTMLInputElement>) {
    if (event.key === "ArrowDown" || event.key === "ArrowUp") {
      event.preventDefault();
      const step = event.key === "ArrowDown" ? 1 : -1;
      const next = (activeIndex + step + results.length) % Math.max(1, results.length);
      setActive(next);
      document.getElementById(`${listId}-${next}`)?.scrollIntoView({ block: "nearest" });
    } else if (event.key === "Enter" && results[activeIndex]) {
      event.preventDefault();
      choose(results[activeIndex]);
    }
  }

  return (
    <Dialog.Root open={isOpen} onOpenChange={setOpen}>
      {trigger ? <Dialog.Trigger asChild>{trigger}</Dialog.Trigger> : null}
      <AnimatePresence>
        {isOpen ? (
          <Dialog.Portal forceMount>
            <Dialog.Overlay asChild forceMount>
              <motion.div
                className="fixed inset-0 z-50 bg-zinc-950/20 backdrop-blur-[3px]"
                initial={{ opacity: 0 }}
                animate={{ opacity: 1 }}
                exit={{ opacity: 0 }}
                transition={{ duration: duration.base }}
              />
            </Dialog.Overlay>
            <div className="pointer-events-none fixed inset-0 z-50 grid place-items-center p-4">
              <Dialog.Content asChild forceMount aria-describedby={undefined}>
                <motion.div
                  variants={overlayVariants(reduceMotion)}
                  initial="hidden"
                  animate="visible"
                  exit="exit"
                  className="pointer-events-auto flex max-h-[min(36rem,calc(100dvh-2rem))] w-full max-w-sm flex-col overflow-hidden rounded-[20px] border border-border bg-popover text-popover-foreground shadow-xl outline-none"
                >
                  <div className="flex h-14 shrink-0 items-center justify-between pr-2 pl-5">
                    <Dialog.Title className="text-base font-semibold tracking-tight text-foreground">{title}</Dialog.Title>
                    <Dialog.Close
                      aria-label="Close"
                      className="inline-flex size-9 cursor-pointer items-center justify-center rounded-lg text-muted-foreground outline-none transition-colors hover:bg-accent hover:text-foreground focus-visible:ring-2 focus-visible:ring-ring"
                    >
                      <X className="size-4" aria-hidden="true" />
                    </Dialog.Close>
                  </div>
                  <div className="shrink-0 px-4">
                    <div className="relative">
                      <Search className="pointer-events-none absolute top-1/2 left-3 size-4 -translate-y-1/2 text-muted-foreground" aria-hidden="true" />
                      <input
                        autoFocus
                        role="combobox"
                        aria-expanded="true"
                        aria-controls={listId}
                        aria-activedescendant={results[activeIndex] ? `${listId}-${activeIndex}` : undefined}
                        aria-label="Search tokens by name, symbol or address"
                        value={query}
                        onChange={(event) => {
                          setQuery(event.target.value);
                          setActive(0);
                        }}
                        onKeyDown={onKeyDown}
                        placeholder="Search name or paste address"
                        className="h-11 w-full rounded-xl border border-border bg-surface pr-3 pl-9 text-sm text-foreground outline-none transition-[border-color,box-shadow] placeholder:text-muted-foreground focus:border-ring focus:bg-background focus:ring-3 focus:ring-ring/15"
                      />
                    </div>
                    {popularTokens.length ? (
                      <div className="flex flex-wrap gap-1.5 pt-3 pb-1">
                        {popularTokens.map((token) => (
                          <button
                            key={token.symbol}
                            type="button"
                            onClick={() => choose(token)}
                            disabled={token.symbol === disabledSymbol}
                            aria-pressed={token.symbol === selected}
                            className={cn(
                              "inline-flex h-8 cursor-pointer items-center gap-1.5 rounded-full border py-0.5 pr-2.5 pl-1 text-[13px] font-medium outline-none transition-colors focus-visible:ring-2 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-40",
                              token.symbol === selected ? "border-foreground/30 bg-accent text-foreground" : "border-border bg-background text-foreground hover:bg-accent",
                            )}
                          >
                            <TokenIcon token={token} size={22} />
                            {token.symbol}
                          </button>
                        ))}
                      </div>
                    ) : null}
                  </div>
                  <div className="mt-2 min-h-0 flex-1 overflow-y-auto overscroll-contain border-t border-border px-2 py-2">
                    {loading ? (
                      <ul aria-busy="true" aria-label="Loading tokens">
                        {[0, 1, 2, 3, 4].map((i) => (
                          <li key={i} className="flex h-14 items-center gap-3 px-3">
                            <span className="size-8 animate-pulse rounded-full bg-muted motion-reduce:animate-none" />
                            <span className="flex-1 space-y-1.5">
                              <span className="block h-3 w-14 animate-pulse rounded bg-muted motion-reduce:animate-none" />
                              <span className="block h-2.5 w-24 animate-pulse rounded bg-muted motion-reduce:animate-none" />
                            </span>
                          </li>
                        ))}
                      </ul>
                    ) : results.length === 0 ? (
                      <p className="px-3 py-10 text-center text-sm text-muted-foreground">No tokens match &ldquo;{query.trim()}&rdquo;.</p>
                    ) : (
                      <ul id={listId} role="listbox" aria-label="Tokens">
                        {results.map((token, index) => {
                          const balance = balances[token.symbol];
                          const isDisabled = token.symbol === disabledSymbol;
                          return (
                            <motion.li
                              key={token.symbol}
                              id={`${listId}-${index}`}
                              role="option"
                              aria-selected={index === activeIndex}
                              aria-disabled={isDisabled || undefined}
                              onPointerMove={() => setActive(index)}
                              onClick={() => choose(token)}
                              initial={reduceMotion ? { opacity: 0 } : { opacity: 0, y: 6 }}
                              animate={{ opacity: isDisabled ? 0.45 : 1, y: 0 }}
                              transition={{ duration: duration.base, ease: ease.out, delay: Math.min(index, 10) * 0.025 }}
                              className={cn(
                                "flex h-14 cursor-pointer items-center gap-3 rounded-xl px-3",
                                index === activeIndex && "bg-accent",
                                isDisabled && "cursor-not-allowed",
                              )}
                            >
                              <TokenIcon token={token} size={32} />
                              <span className="min-w-0 flex-1">
                                <span className="flex items-center gap-1.5 text-sm font-medium text-foreground">
                                  {token.symbol}
                                  {token.symbol === selected ? <Check className="size-3.5" aria-label="Selected" /> : null}
                                </span>
                                <span className="block truncate text-xs text-muted-foreground">{token.name}</span>
                              </span>
                              {balance !== undefined && balance > BigInt(0) ? (
                                <span className="text-right">
                                  <span className="block font-mono text-sm text-foreground tabular-nums">{formatAmount(balance, token.decimals)}</span>
                                  {token.price !== undefined ? (
                                    <span className="block font-mono text-xs text-muted-foreground tabular-nums">
                                      {formatUsd(toUsd(balance, token.decimals, token.price))}
                                    </span>
                                  ) : null}
                                </span>
                              ) : null}
                            </motion.li>
                          );
                        })}
                      </ul>
                    )}
                  </div>
                </motion.div>
              </Dialog.Content>
            </div>
          </Dialog.Portal>
        ) : null}
      </AnimatePresence>
    </Dialog.Root>
  );
}

Usage

import { TokenSelectorModal } from "@/components/ui/token-selector-modal/token-selector-modal";

<TokenSelectorModal
  trigger={<button>Select token</button>}
  tokens={tokens} // { symbol, name, decimals, price?, iconUrl? }[]
  balances={{ ETH: ethBalance, USDC: usdcBalance }}
  popular={["ETH", "USDC", "USDT"]}
  selected="ETH"
  disabledSymbol="USDC" // e.g. the other side of a swap
  onSelect={(token) => setToken(token)}
/>

API reference

Prop	Type	Default	Description
`open`	`boolean`	–	Controlled open state.
`defaultOpen`	`boolean`	`false`	Initial open state when uncontrolled.
`onOpenChange`	`(open: boolean) => void`	–	Called when the dialog opens or closes.
`trigger`	`ReactNode`	–	Element that opens the dialog.
`tokens*`	`Token[]`	–	Tokens to choose from.
`balances`	`Record<string, bigint>`	–	Balances by token symbol, in each token's smallest unit.
`popular`	`string[]`	–	Symbols offered as one-tap chips above the list.
`selected`	`string`	–	Symbol of the currently selected token (marked with a check).
`disabledSymbol`	`string`	–	Symbol that can't be picked, e.g. the other side of a swap.
`onSelect*`	`(token: Token) => void`	–	Called with the picked token; the dialog then closes.
`title`	`string`	`"Select a token"`	Dialog title.
`loading`	`boolean`	`false`	Show skeleton rows while the token list loads.

Tokens with a balance sort first by USD value (bigint math), then alphabetically. Pasting an exact address matches it too.

Accessibility

The search field is a combobox that controls the token listbox: arrow keys move the active option (aria-activedescendant), Enter picks, and focus never leaves the field.
Built on Radix Dialog: focus starts in the search, stays trapped and returns to the trigger on close; Escape closes.
Popular chips are toggle buttons; the token on the other side of a trade is disabled rather than hidden.
Rows fade up with a short stagger. Reduced motion uses a plain fade and stops the loading pulse.

Installation#

CLI