diff --git a/examples/pre/nextjs/src/app/page.tsx b/examples/pre/nextjs/src/app/page.tsx
index 65149bd36..5e612d6b6 100644
--- a/examples/pre/nextjs/src/app/page.tsx
+++ b/examples/pre/nextjs/src/app/page.tsx
@@ -2,10 +2,10 @@
 import {
   Alice,
   Bob,
+  domains,
   EnactedPolicy,
   getPorterUri,
   initialize,
-  PRE_DOMAIN,
   SecretKey,
   toHexString,
 } from '@nucypher/pre';
@@ -107,7 +107,7 @@ function App() {
     const policy = await alice.grant(
       provider,
       provider.getSigner(),
-      getPorterUri(PRE_DOMAIN.TESTNET),
+      getPorterUri(domains.TESTNET),
       policyParams,
     );
 
diff --git a/examples/pre/nodejs/src/index.ts b/examples/pre/nodejs/src/index.ts
index 5006fa65a..931567605 100644
--- a/examples/pre/nodejs/src/index.ts
+++ b/examples/pre/nodejs/src/index.ts
@@ -1,9 +1,9 @@
 import {
   Alice,
   Bob,
+  domains,
   getPorterUri,
   initialize,
-  PRE_DOMAIN,
   SecretKey,
   toBytes,
 } from '@nucypher/pre';
@@ -59,7 +59,7 @@ const runExample = async () => {
     startDate: new Date(),
     endDate: new Date(Date.now() + 1000 * 60 * 60 * 24 * 30), // In 30 days,
   };
-  const porterUri = getPorterUri(PRE_DOMAIN.TESTNET);
+  const porterUri = getPorterUri(domains.TESTNET);
   const alice = makeAlice();
 
   console.log('Creating policy...');
diff --git a/examples/pre/react/src/App.tsx b/examples/pre/react/src/App.tsx
index 3c3de670f..54d9ea5a3 100644
--- a/examples/pre/react/src/App.tsx
+++ b/examples/pre/react/src/App.tsx
@@ -1,10 +1,10 @@
 import {
   Alice,
   Bob,
+  domains,
   EnactedPolicy,
   getPorterUri,
   initialize,
-  PRE_DOMAIN,
   SecretKey,
   toHexString
 } from '@nucypher/pre';
@@ -98,7 +98,7 @@ function App() {
     const policy = await alice.grant(
       provider,
       provider.getSigner(),
-      getPorterUri(PRE_DOMAIN.TESTNET),
+      getPorterUri(domains.TESTNET),
       policyParams,
     );
 
diff --git a/examples/pre/webpack-5/src/index.ts b/examples/pre/webpack-5/src/index.ts
index f1dfa348f..fe05e1f4b 100644
--- a/examples/pre/webpack-5/src/index.ts
+++ b/examples/pre/webpack-5/src/index.ts
@@ -1,10 +1,10 @@
 import {
   Alice,
   Bob,
-  PRE_DOMAIN,
-  SecretKey,
+  domains,
   getPorterUri,
   initialize,
+  SecretKey,
 } from '@nucypher/pre';
 import { ethers } from 'ethers';
 
@@ -65,7 +65,7 @@ const runExample = async () => {
     startDate,
     endDate,
   };
-  const porterUri = getPorterUri(PRE_DOMAIN.TESTNET);
+  const porterUri = getPorterUri(domains.TESTNET);
 
   const alice = makeAlice();
   const policy = await alice.grant(
diff --git a/examples/taco/nextjs/src/app/page.tsx b/examples/taco/nextjs/src/app/page.tsx
index a7e3da8fa..adc7e6393 100644
--- a/examples/taco/nextjs/src/app/page.tsx
+++ b/examples/taco/nextjs/src/app/page.tsx
@@ -2,10 +2,11 @@
 import {
   conditions,
   decrypt,
-  encrypt, fromBytes,
+  domains,
+  encrypt,
+  fromBytes,
   getPorterUri,
-  initialize,
-  TACO_DOMAIN
+  initialize
 } from '@nucypher/taco';
 import {ethers} from 'ethers';
 import {useEffect, useState} from 'react';
@@ -90,7 +91,7 @@ function App() {
     const messageKit = await encrypt(provider, message, hasPositiveBalance, ritualId, signer);
 
     console.log('Decrypting message...');
-    const porterUri = getPorterUri(TACO_DOMAIN.DEV);
+    const porterUri = getPorterUri(domains.DEV);
     const decryptedMessage = await decrypt(provider, messageKit,porterUri,signer);
 
     setDecryptedMessage(fromBytes(decryptedMessage));
diff --git a/examples/taco/nodejs/src/index.ts b/examples/taco/nodejs/src/index.ts
index 1bbfa6550..339fc7cb9 100644
--- a/examples/taco/nodejs/src/index.ts
+++ b/examples/taco/nodejs/src/index.ts
@@ -5,7 +5,7 @@ import {
   fromBytes,
   getPorterUri,
   initialize,
-  TACO_DOMAIN,
+  domains,
   toBytes,
 } from '@nucypher/taco';
 import * as dotenv from 'dotenv';
@@ -58,7 +58,7 @@ const runExample = async () => {
   );
 
   console.log('Decrypting message...');
-  const porterUri = getPorterUri(TACO_DOMAIN.DEV);
+  const porterUri = getPorterUri(domains.DEV);
   const decryptedBytes = await decrypt(provider, messageKit, porterUri, signer);
   const decryptedMessageString = fromBytes(decryptedBytes);
   console.log('Decrypted message:', decryptedMessageString);
diff --git a/examples/taco/react/src/App.tsx b/examples/taco/react/src/App.tsx
index 67691a937..4ff758a89 100644
--- a/examples/taco/react/src/App.tsx
+++ b/examples/taco/react/src/App.tsx
@@ -5,7 +5,7 @@ import {
   fromBytes,
   getPorterUri,
   initialize,
-  TACO_DOMAIN,
+  domains,
 } from '@nucypher/taco';
 import {ethers} from 'ethers';
 import {useEffect, useState} from 'react';
@@ -90,7 +90,7 @@ function App() {
     const messageKit = await encrypt(provider, message, hasPositiveBalance, ritualId, signer);
 
     console.log('Decrypting message...');
-    const porterUri = getPorterUri(TACO_DOMAIN.DEV);
+    const porterUri = getPorterUri(domains.DEV);
     const decryptedMessage = await decrypt(provider, messageKit, porterUri, signer);
 
     setDecryptedMessage(fromBytes(decryptedMessage));
diff --git a/examples/taco/webpack-5/src/index.ts b/examples/taco/webpack-5/src/index.ts
index 3554c8e76..5b44889ab 100644
--- a/examples/taco/webpack-5/src/index.ts
+++ b/examples/taco/webpack-5/src/index.ts
@@ -5,7 +5,7 @@ import {
   fromBytes,
   getPorterUri,
   initialize,
-  TACO_DOMAIN,
+  domains,
   toBytes,
 } from '@nucypher/taco';
 import { ethers } from 'ethers';
@@ -48,7 +48,7 @@ const runExample = async () => {
   );
 
   console.log('Decrypting message...');
-  const porterUri = getPorterUri(TACO_DOMAIN.DEV);
+  const porterUri = getPorterUri(domains.DEV);
   const decryptedBytes = await decrypt(provider, messageKit, porterUri, signer);
   const decryptedMessage = fromBytes(decryptedBytes);
   console.log('Decrypted message:', decryptedMessage);
diff --git a/packages/pre/src/index.ts b/packages/pre/src/index.ts
index 9b4a13d95..c5bf1e123 100644
--- a/packages/pre/src/index.ts
+++ b/packages/pre/src/index.ts
@@ -7,10 +7,9 @@ export {
   SecretKey,
   Signer,
   TreasureMap,
-  initialize,
 } from '@nucypher/nucypher-core';
+export { fromBytes, initialize, toBytes, toHexString, getPorterUri, domains } from '@nucypher/shared';
 
 export { Alice, Bob, Enrico } from './characters';
 export { Cohort } from './cohort';
 export { EnactedPolicy } from './policy';
-export * from './porter';
diff --git a/packages/pre/src/porter.ts b/packages/pre/src/porter.ts
deleted file mode 100644
index 8e244265a..000000000
--- a/packages/pre/src/porter.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import { getPorterUri as doGetPorterUri } from '@nucypher/shared';
-
-type PreDomain = 'oryx';
-
-export const PRE_DOMAIN: Record<string, PreDomain> = {
-  TESTNET: 'oryx',
-};
-
-export const getPorterUri = (domain: PreDomain): string => {
-  const preDomainKeys = Object.keys(PRE_DOMAIN);
-  if (!preDomainKeys.includes(domain)) {
-    throw new Error(`${domain} is not a valid PRE domain.`);
-  }
-  return doGetPorterUri(domain);
-};
-
-export { fromBytes, initialize, toBytes, toHexString } from '@nucypher/shared';
diff --git a/packages/shared/src/porter.ts b/packages/shared/src/porter.ts
index c9a6e3f7b..2de148620 100644
--- a/packages/shared/src/porter.ts
+++ b/packages/shared/src/porter.ts
@@ -18,9 +18,16 @@ const porterUri: Record<string, string> = {
   oryx: 'https://porter-oryx.nucypher.community',
   lynx: 'https://porter-lynx.nucypher.community',
 };
-export type PorterDomain = keyof typeof porterUri;
 
-export const getPorterUri = (domain: PorterDomain): string => {
+export type Domain = keyof typeof porterUri;
+
+export const domains: Record<string, Domain> = {
+  DEV: 'lynx',
+  TESTNET: 'tapir',
+  MAINNET: 'mainnet',
+};
+
+export const getPorterUri = (domain: Domain): string => {
   const uri = porterUri[domain];
   if (!uri) {
     throw new Error(`No default Porter URI found for domain: ${domain}`);
diff --git a/packages/taco/src/index.ts b/packages/taco/src/index.ts
index 617e917b2..f2d9646f4 100644
--- a/packages/taco/src/index.ts
+++ b/packages/taco/src/index.ts
@@ -1,5 +1,5 @@
 export { DkgPublicKey, ThresholdMessageKit } from '@nucypher/nucypher-core';
+export { fromBytes, initialize, toBytes, toHexString, getPorterUri, domains } from '@nucypher/shared';
 
 export * as conditions from './conditions';
-export * from './porter';
 export * from './taco';
diff --git a/packages/taco/src/porter.ts b/packages/taco/src/porter.ts
deleted file mode 100644
index 6572db214..000000000
--- a/packages/taco/src/porter.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { getPorterUri as doGetPorterUri } from '@nucypher/shared';
-
-type TacoDomain = 'lynx' | 'tapir';
-
-export const TACO_DOMAIN: Record<string, TacoDomain> = {
-  DEV: 'lynx',
-  TESTNET: 'tapir',
-};
-
-export const getPorterUri = (domain: TacoDomain): string => {
-  const tacoDomainKeys = Object.keys(TACO_DOMAIN);
-  if (!tacoDomainKeys.includes(domain)) {
-    throw new Error(`${domain} is not a valid TACo domain.`);
-  }
-  return doGetPorterUri(domain);
-};
-
-export { fromBytes, initialize, toBytes, toHexString } from '@nucypher/shared';