feat(evm): add Telos EVM mainnet support

go/.changes/unreleased/telos-support.yaml

@@ -0,0 +1,2 @@
+kind: added
+body: Add Telos EVM mainnet (chain ID 40) support with USDC.e (Stargate) as the default stablecoin

go/mechanisms/evm/constants.go

@@ -59,6 +59,7 @@ var (
 	ChainIDBase        = big.NewInt(8453)
 	ChainIDBaseSepolia = big.NewInt(84532)
 	ChainIDMegaETH     = big.NewInt(4326)
+	ChainIDTelos       = big.NewInt(40)
 
 	// Network configurations
 	// See DEFAULT_ASSET.md for guidelines on adding new chains
@@ -131,6 +132,26 @@ var (
 				Decimals: 18,
 			},
 		},
+		// Telos EVM Mainnet
+		"eip155:40": {
+			ChainID: ChainIDTelos,
+			DefaultAsset: AssetInfo{
+				Address:  "0xF1815bd50389c46847f0Bda824eC8da914045D14", // USDC.e (Stargate) - FiatTokenV2
+				Name:     "Bridged USDC (Stargate)",
+				Version:  "2",
+				Decimals: DefaultDecimals,
+			},
+		},
+		// Telos EVM Mainnet (legacy v1 format)
+		"telos": {
+			ChainID: ChainIDTelos,
+			DefaultAsset: AssetInfo{
+				Address:  "0xF1815bd50389c46847f0Bda824eC8da914045D14",
+				Name:     "Bridged USDC (Stargate)",
+				Version:  "2",
+				Decimals: DefaultDecimals,
+			},
+		},
 	}
 
 	// EIP-3009 ABI for transferWithAuthorization with v,r,s (EOA signatures)

python/x402/changelog.d/telos-support.feature.md

@@ -0,0 +1 @@
+Add Telos EVM mainnet (chain ID 40) support with USDC.e (Stargate) as the default stablecoin

python/x402/mechanisms/evm/constants.py

@@ -177,6 +177,24 @@ class NetworkConfig(TypedDict):
             },
         },
     },
+    # Telos EVM Mainnet
+    "eip155:40": {
+        "chain_id": 40,
+        "default_asset": {
+            "address": "0xF1815bd50389c46847f0Bda824eC8da914045D14",
+            "name": "Bridged USDC (Stargate)",
+            "version": "2",
+            "decimals": 6,
+        },
+        "supported_assets": {
+            "USDC.e": {
+                "address": "0xF1815bd50389c46847f0Bda824eC8da914045D14",
+                "name": "Bridged USDC (Stargate)",
+                "version": "2",
+                "decimals": 6,
+            },
+        },
+    },
 }
 
 # Network aliases (legacy names to CAIP-2)
@@ -189,6 +207,7 @@ class NetworkConfig(TypedDict):
     "polygon": "eip155:137",
     "avalanche": "eip155:43114",
     "megaeth": "eip155:4326",
+    "telos": "eip155:40",
 }
 
 # V1 supported networks (legacy name-based)
@@ -209,6 +228,7 @@ class NetworkConfig(TypedDict):
     "educhain",
     "skale-base-sepolia",
     "megaeth",
+    "telos",
 ]
 
 # V1 network name to chain ID mapping
@@ -230,6 +250,7 @@ class NetworkConfig(TypedDict):
     "educhain": 656476,
     "skale-base-sepolia": 1444673419,
     "megaeth": 4326,
+    "telos": 40,
 }
 
 # EIP-3009 ABIs

typescript/.changeset/add-telos-support.md

@@ -0,0 +1,5 @@
+---
+"@x402/evm": minor
+---
+
+Add Telos EVM mainnet (chain ID 40) support with USDC.e (Stargate) as the default stablecoin

typescript/packages/mechanisms/evm/src/exact/server/scheme.ts

@@ -207,6 +207,12 @@ export class ExactEvmScheme implements SchemeNetworkServer {
         version: "1",
         decimals: 18,
       }, // MegaETH mainnet USDM
+      "eip155:40": {
+        address: "0xF1815bd50389c46847f0Bda824eC8da914045D14",
+        name: "Bridged USDC (Stargate)",
+        version: "2",
+        decimals: 6,
+      }, // Telos EVM mainnet USDC.e
     };
 
     const assetInfo = stablecoins[network];

typescript/packages/mechanisms/evm/src/v1/index.ts

@@ -19,6 +19,7 @@ export const EVM_NETWORK_CHAIN_ID_MAP = {
   educhain: 41923,
   "skale-base-sepolia": 324705682,
   megaeth: 4326,
+  telos: 40,
 } as const;
 
 export type EvmNetworkV1 = keyof typeof EVM_NETWORK_CHAIN_ID_MAP;