first push to leverage ts sdk for constants

gen/.gitignore

@@ -0,0 +1 @@
+node_modules

gen/Makefile

@@ -0,0 +1,14 @@
+GENEREATORS = chains cctpDomains
+
+chains_PATH = ../src/constants/Chains.sol
+cctpDomains_PATH = ../src/constants/CCTPDomains.sol
+
+.PHONY: generate $(GENEREATORS)
+
+generate: $(GENEREATORS)
+
+$(GENEREATORS): node_modules
+	npm run --silent $@ > $($@_PATH)
+
+node_modules:
+	npm install

gen/cctpDomains.ts

@@ -0,0 +1,30 @@
+import { toCapsSnakeCase } from "./utils";
+import * as base from "@wormhole-foundation/sdk-base";
+
+const { circleChainId, circleNetworks, circleChainMap } = base.circle;
+
+console.log(
+`// SPDX-License-Identifier: Apache 2
+pragma solidity ^0.8.0;
+
+// This file is auto-generated by gen/cctpDomains.ts.
+`);
+
+if (circleNetworks[0] !== "Mainnet" || circleNetworks[1] !== "Testnet")
+  throw new Error("circleNetworks has unexpected content");
+
+const mainnetChains = base.column(circleChainMap[0], 0);
+const testnetChains = base.column(circleChainMap[1], 0);
+
+for (const chain of mainnetChains)
+  console.log(
+    `uint32 constant CCTP_DOMAIN_${toCapsSnakeCase(chain)} = ${circleChainId("Mainnet", chain)};`
+  );
+
+console.log(`
+// Additional Testnet mappings:`);
+for (const chain of testnetChains)
+  if (!(mainnetChains as string[]).includes(chain))
+    console.log(
+      `uint32 constant CCTP_DOMAIN_${toCapsSnakeCase(chain)} = ${circleChainId("Testnet", chain)};`
+    );

gen/chains.ts

@@ -0,0 +1,16 @@
+import { toCapsSnakeCase } from "./utils";
+import * as base from "@wormhole-foundation/sdk-base";
+
+const { chains, chainToChainId } = base.chain;
+
+console.log(
+`// SPDX-License-Identifier: Apache 2
+pragma solidity ^0.8.0;
+
+// This file is auto-generated by gen/chains.ts.
+
+// In the wormhole wire format, 0 indicates that a message is for any destination chain
+uint16 constant CHAIN_ID_UNSET = 0;`);
+
+for (const chain of chains)
+  console.log(`uint16 constant CHAIN_ID_${toCapsSnakeCase(chain)} = ${chainToChainId(chain)};`);