Add Silverback Facilitator

packages/external/facilitators/README.md

@@ -121,6 +121,7 @@ This package includes pre-configured integrations for the following X402 facilit
 | **Meridian**         | BASE          | No        | No                           |
 | **Openmid**          | BASE          | No        | No                           |
 | **Primer**           | BASE          | No        | No                           |
+| **Silverback**       | BASE          | ✅ Yes    | No                           |
 | **RelAI**            | BASE, SOLANA  | ✅ Yes    | No                           |
 
 ### Import Individual Facilitators
@@ -148,6 +149,7 @@ import {
   meridian,
   openmid,
   primer,
+  silverback,
   relai,
 } from 'facilitators';
 

packages/external/facilitators/src/discovery/index.ts

@@ -10,6 +10,7 @@ export { thirdwebDiscovery } from '../facilitators/thirdweb';
 export { questflowDiscovery } from '../facilitators/questflow';
 export { ultravioletadaoDiscovery } from '../facilitators/ultravioletadao';
 export { anyspendDiscovery } from '../facilitators/anyspend';
+export { silverbackDiscovery } from '../facilitators/silverback';
 export { relaiDiscovery } from '../facilitators/relai';
 
 export { discoverableFacilitators } from './facilitators';

packages/external/facilitators/src/facilitators/index.ts

@@ -24,4 +24,5 @@ export { openmid, openmidFacilitator } from './openmid';
 export { primer, primerFacilitator } from './primer';
 export { x402jobs, x402jobsFacilitator } from './x402jobs';
 export { openfacilitator, openfacilitatorFacilitator } from './openfacilitator';
+export { silverback, silverbackFacilitator } from './silverback';
 export { relai, relaiFacilitator } from './relai';

packages/external/facilitators/src/facilitators/silverback.ts

@@ -0,0 +1,90 @@
+import { Network } from '../types';
+
+import type { Facilitator, FacilitatorConfig, Token } from '../types';
+
+// Silverback-specific tokens (addresses must be lowercase)
+const USDC_BASE_TOKEN: Token = {
+  address: '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913',
+  decimals: 6,
+  symbol: 'USDC',
+};
+
+const BACK_TOKEN: Token = {
+  address: '0x558881c4959e9cf961a7e1815fcd6586906babd2',
+  decimals: 18,
+  symbol: 'BACK',
+};
+
+const USDT_BASE_TOKEN: Token = {
+  address: '0xfde4c96c8593536e31f229ea8f37b2ada2699bb2',
+  decimals: 6,
+  symbol: 'USDT',
+};
+
+const DAI_BASE_TOKEN: Token = {
+  address: '0x50c5725949a6f0c72e6c4a641f24049a917db0cb',
+  decimals: 18,
+  symbol: 'DAI',
+};
+
+const USDBC_TOKEN: Token = {
+  address: '0xd9aaec86b65d86f6a7b5b1b0c42ffa531710b6ca',
+  decimals: 6,
+  symbol: 'USDbC',
+};
+
+const VIRTUAL_TOKEN: Token = {
+  address: '0x0b3e328455c4059eeb9e3f84b5543f74e24e7e1b',
+  decimals: 18,
+  symbol: 'VIRTUAL',
+};
+
+const WETH_BASE_TOKEN: Token = {
+  address: '0x4200000000000000000000000000000000000006',
+  decimals: 18,
+  symbol: 'WETH',
+};
+
+const CBBTC_TOKEN: Token = {
+  address: '0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf',
+  decimals: 8,
+  symbol: 'cbBTC',
+};
+
+export const silverback: FacilitatorConfig = {
+  url: 'https://facilitator.silverbackdefi.app/',
+};
+
+export const silverbackDiscovery: FacilitatorConfig = {
+  url: 'https://facilitator.silverbackdefi.app/',
+};
+
+export const silverbackFacilitator = {
+  id: 'silverback',
+  metadata: {
+    name: 'Silverback',
+    image: '/silverback.png',
+    docsUrl: 'https://docs.silverbackdefi.app/',
+    color: '#1A1A1A',
+  },
+  config: silverback,
+  discoveryConfig: silverbackDiscovery,
+  addresses: {
+    [Network.BASE]: [
+      {
+        address: '0x21fded74c901129977b8e28c2588595163e1e235',
+        tokens: [
+          BACK_TOKEN,
+          USDC_BASE_TOKEN,
+          USDT_BASE_TOKEN,
+          DAI_BASE_TOKEN,
+          USDBC_TOKEN,
+          VIRTUAL_TOKEN,
+          WETH_BASE_TOKEN,
+          CBBTC_TOKEN,
+        ],
+        dateOfFirstTransaction: new Date('2026-02-05'),
+      },
+    ],
+  },
+} as const satisfies Facilitator;

packages/external/facilitators/src/lists/all.ts

@@ -24,6 +24,7 @@ import {
   primerFacilitator,
   x402jobsFacilitator,
   openfacilitatorFacilitator,
+  silverbackFacilitator,
   relaiFacilitator,
 } from '../facilitators';
 
@@ -57,6 +58,7 @@ const FACILITATORS = validateUniqueFacilitators([
   primerFacilitator,
   x402jobsFacilitator,
   openfacilitatorFacilitator,
+  silverbackFacilitator,
   relaiFacilitator,
 ]);