diff --git a/packages/bech32m/src/format/bytes.ts b/packages/bech32m/src/format/bytes.ts
index daee8ace2..a34ad42db 100644
--- a/packages/bech32m/src/format/bytes.ts
+++ b/packages/bech32m/src/format/bytes.ts
@@ -4,10 +4,12 @@ export const ByteLength = {
   passet: 32,
   pauctid: 32,
   penumbra: 80,
+  penumbracompat1: 80,
   penumbrafullviewingkey: 64,
   penumbragovern: 32,
   penumbraspendkey: 32,
   penumbravalid: 32,
   penumbrawalletid: 32,
   plpid: 32,
+  tpenumbra: 32,
 } as const satisfies Required<Record<Prefix, number>>;
diff --git a/packages/bech32m/src/format/index.ts b/packages/bech32m/src/format/index.ts
index 87904c299..e123e296e 100644
--- a/packages/bech32m/src/format/index.ts
+++ b/packages/bech32m/src/format/index.ts
@@ -67,4 +67,16 @@ export default {
     byteLength: ByteLength.plpid,
     innerName: Inner.plpid,
   },
+  penumbracompat1: {
+    prefix: Prefixes.penumbracompat1,
+    stringLength: StringLength.penumbracompat1,
+    byteLength: ByteLength.penumbracompat1,
+    innerName: Inner.penumbracompat1,
+  },
+  tpenumbra: {
+    prefix: Prefixes.tpenumbra,
+    stringLength: StringLength.tpenumbra,
+    byteLength: ByteLength.tpenumbra,
+    innerName: Inner.tpenumbra,
+  },
 } as const satisfies PenumbraBech32mSpec;
diff --git a/packages/bech32m/src/format/inner.ts b/packages/bech32m/src/format/inner.ts
index d3c114164..f1ce08fd1 100644
--- a/packages/bech32m/src/format/inner.ts
+++ b/packages/bech32m/src/format/inner.ts
@@ -10,4 +10,6 @@ export const Inner = {
   penumbravalid: 'ik',
   penumbrawalletid: 'inner',
   plpid: 'inner',
+  penumbracompat1: 'inner',
+  tpenumbra: 'inner',
 } as const satisfies Required<Record<Prefix, string>>;
diff --git a/packages/bech32m/src/format/prefix.ts b/packages/bech32m/src/format/prefix.ts
index 0afbf525c..1d11343e1 100644
--- a/packages/bech32m/src/format/prefix.ts
+++ b/packages/bech32m/src/format/prefix.ts
@@ -8,6 +8,8 @@ export const Prefixes = {
   penumbravalid: 'penumbravalid',
   penumbrawalletid: 'penumbrawalletid',
   plpid: 'plpid',
+  penumbracompat1: 'penumbracompat1',
+  tpenumbra: 'tpenumbra',
 } as const;
 
 export type Prefix = keyof typeof Prefixes;
diff --git a/packages/bech32m/src/format/strings.ts b/packages/bech32m/src/format/strings.ts
index 5b35ba5d7..2d9d62e13 100644
--- a/packages/bech32m/src/format/strings.ts
+++ b/packages/bech32m/src/format/strings.ts
@@ -10,4 +10,6 @@ export const StringLength = {
   penumbravalid: 72,
   penumbrawalletid: 75,
   plpid: 64,
+  penumbracompat1: 150,
+  tpenumbra: 68,
 } as const satisfies Required<Record<Prefix, number>>;
diff --git a/packages/bech32m/src/index.ts b/packages/bech32m/src/index.ts
index c1e32bca9..aa67955f4 100644
--- a/packages/bech32m/src/index.ts
+++ b/packages/bech32m/src/index.ts
@@ -28,3 +28,6 @@ export const PENUMBRA_BECH32M_WALLETID_PREFIX = SPEC.penumbrawalletid.prefix;
 
 export const PENUMBRA_BECH32M_POSITIONID_LENGTH = SPEC.plpid.stringLength;
 export const PENUMBRA_BECH32M_POSITIONID_PREFIX = SPEC.plpid.prefix;
+
+export const PENUMBRA_BECH32M_TRANSPARENT_LENGTH = SPEC.tpenumbra.stringLength;
+export const PENUMBRA_BECH32M_TRANSPARENT_PREFIX = SPEC.tpenumbra.prefix;
diff --git a/packages/bech32m/src/penumbracompat1.ts b/packages/bech32m/src/penumbracompat1.ts
new file mode 100644
index 000000000..8da7caec0
--- /dev/null
+++ b/packages/bech32m/src/penumbracompat1.ts
@@ -0,0 +1,24 @@
+import { fromBech32, toBech32 } from './format/convert.js';
+import { Inner } from './format/inner.js';
+import { Prefixes } from './format/prefix.js';
+
+const innerName = Inner.penumbracompat1;
+const prefix = Prefixes.penumbracompat1;
+
+export const bech32CompatAddress = ({ [innerName]: bytes }: { [innerName]: Uint8Array }) =>
+  toBech32(bytes, prefix);
+
+export const compatAddressFromBech32 = (penumbracompat1: string): { [innerName]: Uint8Array } => ({
+  [innerName]: fromBech32(penumbracompat1 as `${typeof prefix}1${string}`, prefix),
+});
+
+export const isCompatAddress = (check: string): check is `${typeof prefix}1${string}` => {
+  try {
+    compatAddressFromBech32(check);
+    return true;
+  } catch {
+    return false;
+  }
+};
+
+export { PENUMBRA_BECH32M_ADDRESS_LENGTH, PENUMBRA_BECH32M_ADDRESS_PREFIX } from './index.js';
diff --git a/packages/bech32m/src/test/penumbracompat1.test.ts b/packages/bech32m/src/test/penumbracompat1.test.ts
new file mode 100644
index 000000000..d0422671b
--- /dev/null
+++ b/packages/bech32m/src/test/penumbracompat1.test.ts
@@ -0,0 +1,25 @@
+import { describe } from 'vitest';
+import { generateTests } from './util/generate-tests.js';
+import { bech32CompatAddress, compatAddressFromBech32 } from '../penumbracompat1.js';
+import { Prefixes } from '../format/prefix.js';
+import { Inner } from '../format/inner.js';
+
+describe('compat address conversion', () => {
+  const okInner = new Uint8Array([
+    175, 182, 158, 255, 239, 16, 245, 221, 208, 117, 160, 44, 235, 175, 198, 0, 6, 216, 6, 143, 192,
+    155, 159, 103, 97, 103, 136, 5, 78, 209, 17, 200, 68, 220, 182, 45, 20, 246, 181, 16, 117, 182,
+    46, 141, 74, 101, 196, 86, 185, 124, 206, 253, 195, 57, 224, 34, 210, 22, 123, 246, 136, 10,
+    208, 159, 24, 235, 148, 153, 211, 7, 137, 198, 158, 226, 221, 22, 208, 152, 246, 247,
+  ]);
+  const okBech32 =
+    'penumbracompat1147mfall0zr6am5r45qkwht7xqqrdsp50czde7empv7yq2nk3z8yyfh9k9520ddgswkmzar22vhz9dwtuem7uxw0qytfpv7lk3q9dp8ccaw2fn5c838rfackazmgf3ahhwqq0da';
+
+  generateTests(
+    Prefixes.penumbracompat1,
+    Inner.penumbracompat1,
+    okInner,
+    okBech32,
+    bech32CompatAddress,
+    compatAddressFromBech32,
+  );
+});
diff --git a/packages/bech32m/src/test/tpenumbra.test.ts b/packages/bech32m/src/test/tpenumbra.test.ts
new file mode 100644
index 000000000..889cb419c
--- /dev/null
+++ b/packages/bech32m/src/test/tpenumbra.test.ts
@@ -0,0 +1,22 @@
+import { describe } from 'vitest';
+import { generateTests } from './util/generate-tests.js';
+import { bech32TransparentAddress, transparentAddressFromBech32 } from '../tpenumbra.js';
+import { Prefixes } from '../format/prefix.js';
+import { Inner } from '../format/inner.js';
+
+describe('transparent address conversion', () => {
+  const okInner = new Uint8Array([
+    102, 236, 169, 166, 203, 152, 194, 89, 236, 246, 59, 69, 221, 32, 49, 49, 83, 29, 119, 117, 124,
+    201, 194, 156, 219, 251, 137, 202, 157, 235, 1, 15,
+  ]);
+  const okBech32 = 'tpenumbra1vmk2nfktnrp9nm8k8dza6gp3x9f36am40nyu98xmlwyu480tqy8sr3jfzd';
+
+  generateTests(
+    Prefixes.tpenumbra,
+    Inner.tpenumbra,
+    okInner,
+    okBech32,
+    bech32TransparentAddress,
+    transparentAddressFromBech32,
+  );
+});
diff --git a/packages/bech32m/src/tpenumbra.ts b/packages/bech32m/src/tpenumbra.ts
new file mode 100644
index 000000000..eaf60d5e3
--- /dev/null
+++ b/packages/bech32m/src/tpenumbra.ts
@@ -0,0 +1,27 @@
+import { fromBech32, toBech32 } from './format/convert.js';
+import { Inner } from './format/inner.js';
+import { Prefixes } from './format/prefix.js';
+
+const innerName = Inner.tpenumbra;
+const prefix = Prefixes.tpenumbra;
+
+export const bech32TransparentAddress = ({ [innerName]: bytes }: { [innerName]: Uint8Array }) =>
+  toBech32(bytes, prefix);
+
+export const transparentAddressFromBech32 = (penumbra1: string): { [innerName]: Uint8Array } => ({
+  [innerName]: fromBech32(penumbra1 as `${typeof prefix}1${string}`, prefix),
+});
+
+export const isAddress = (check: string): check is `${typeof prefix}1${string}` => {
+  try {
+    transparentAddressFromBech32(check);
+    return true;
+  } catch {
+    return false;
+  }
+};
+
+export {
+  PENUMBRA_BECH32M_TRANSPARENT_LENGTH,
+  PENUMBRA_BECH32M_TRANSPARENT_PREFIX,
+} from './index.js';
diff --git a/packages/types/src/address.test.ts b/packages/types/src/address.test.ts
index 371769a15..9751b2d54 100644
--- a/packages/types/src/address.test.ts
+++ b/packages/types/src/address.test.ts
@@ -2,6 +2,14 @@ import { describe, expect, test } from 'vitest';
 import { parseIntoAddr } from './address.js';
 
 describe('parseIntoAddr', () => {
+  test('works with compat', () => {
+    expect(() =>
+      parseIntoAddr(
+        'penumbracompat1147mfall0zr6am5r45qkwht7xqqrdsp50czde7empv7yq2nk3z8yyfh9k9520ddgswkmzar22vhz9dwtuem7uxw0qytfpv7lk3q9dp8ccaw2fn5c838rfackazmgf3ahhwqq0da',
+      ),
+    ).not.toThrow();
+  });
+
   test('works with normal addresses', () => {
     expect(() =>
       parseIntoAddr(
diff --git a/packages/types/src/address.ts b/packages/types/src/address.ts
index cbf3f78f2..97f1182f6 100644
--- a/packages/types/src/address.ts
+++ b/packages/types/src/address.ts
@@ -1,6 +1,10 @@
 import { Address } from '@penumbra-zone/protobuf/penumbra/core/keys/v1/keys_pb';
 import { addressFromBech32m } from '@penumbra-zone/bech32m/penumbra';
+import { compatAddressFromBech32, isCompatAddress } from '@penumbra-zone/bech32m/penumbracompat1';
 
 export const parseIntoAddr = (addrStr: string): Address => {
+  if (isCompatAddress(addrStr)) {
+    return new Address(compatAddressFromBech32(addrStr));
+  }
   return new Address(addressFromBech32m(addrStr));
 };
diff --git a/packages/wasm/crate/src/keys.rs b/packages/wasm/crate/src/keys.rs
index 22bcea5ef..a6df15a41 100644
--- a/packages/wasm/crate/src/keys.rs
+++ b/packages/wasm/crate/src/keys.rs
@@ -202,3 +202,16 @@ pub fn get_transparent_address(full_viewing_key: &[u8]) -> WasmResult<Transparen
         encoding: encoding.to_string(),
     })
 }
+
+/// get transmission key (public key for this payment address)
+/// Arguments:
+///     address: `byte representation inner Address`
+/// Returns: `Uint8Array representing inner Address`
+#[wasm_bindgen]
+pub fn get_transmission_key_by_address(address: &[u8]) -> WasmResult<Vec<u8>> {
+    utils::set_panic_hook();
+
+    let address: Address = Address::decode(address)?;
+    let transmission_key = address.transmission_key();
+    Ok(transmission_key.0.to_vec())
+}
diff --git a/packages/wasm/src/keys.ts b/packages/wasm/src/keys.ts
index ede3bed6b..d7d26dec5 100644
--- a/packages/wasm/src/keys.ts
+++ b/packages/wasm/src/keys.ts
@@ -5,6 +5,7 @@ import {
   get_full_viewing_key,
   get_noble_forwarding_addr,
   get_transparent_address,
+  get_transmission_key_by_address,
   get_wallet_id,
 } from '../wasm/index.js';
 import {
@@ -65,3 +66,8 @@ export const getTransparentAddress = (fvk: FullViewingKey) => {
     encoding: res.encoding,
   };
 };
+
+export const getTransmissionKeyByAddress = (address: Address) => {
+  const transmission_key = get_transmission_key_by_address(address.toBinary());
+  return transmission_key;
+};