feat: add Ink (57073) support (#694)

Phase 3 of the Ink DutchV3 rollout. The reactor and OrderQuoter are
deployed and verified (Uniswap/UniswapX#375) and the SDK mappings are
published in @uniswap/uniswapx-sdk 3.1.0 (Uniswap/sdks#682).

- ChainId.INK added to SUPPORTED_CHAINS (lib/util/chain.ts). Each entry
  needs an RPC resolvable by getRpcUrl(chainId), which appends the chainId
  to RPC_PREFIX_URL — no per-chain env var required.
- OLDEST_BLOCK_BY_CHAIN[INK] = 52464000. The V3 reactor
  (0x000000007A1C8e570011EeDF86A2A35593013cBA) was created in block
  52464395 on Ink; verified on-chain that the address has 0 bytes of code
  at 52464000 and 17206 bytes at 52464395, so the seed sits just below the
  earliest block any UniswapX fill could appear on, per the map's
  convention.
- swagger.json's ChainId enum gains 57073, which test/unit/swagger.test.ts
  asserts stays in sync with SUPPORTED_CHAINS.
- @uniswap/uniswapx-sdk bumped 3.0.10 -> 3.1.0.

The SDK bump ships with the chain entry because 3.0.10 has no 57073
mappings: order parsing/validation would throw MissingConfiguration out of
getPermit2/getReactor rather than degrade.

No PRIORITY_ORDER_TARGET_BLOCK_BUFFER or HYBRID_ORDER_TARGET_BLOCK_BUFFER
entry is needed. Both are Partial<Record<ChainId, number>> and
OffChainUniswapXOrderValidator.validateReactorAddress rejects
priority/hybrid orders for chains absent from the SDK's reactor mapping
before the buffers are consulted, so a missing entry is unreachable rather
than a build break. No block-time constant either: BLOCKS_IN_24_HOURS
derives from sdk-core's getAverageBlockTimeSecs, which registers Ink at 1s.

Tests: 547 pass. The 14 remaining failures are pre-existing — clean main
reports the identical 14 (field-validator cosigner, order-validator v3).
Before the swagger fix this branch showed 15, i.e. exactly the one
legitimate new failure, now resolved. tsc build clean.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: codyborn

lib/util/chain.ts

@@ -26,4 +26,5 @@ export const SUPPORTED_CHAINS = [
   ChainId.ZORA,
   ChainId.ROBINHOOD,
   ChainId.ARC,
+  ChainId.INK,
 ]

lib/util/constants.ts

@@ -33,6 +33,7 @@ export const OLDEST_BLOCK_BY_CHAIN = {
   [ChainId.ZORA]: 45736000,
   [ChainId.ROBINHOOD]: 53000,
   [ChainId.ARC]: 4852000,
+  [ChainId.INK]: 52464000,
 }
 export const BLOCKS_IN_24_HOURS = (chainId: ChainId): number => {
   return Math.floor(ONE_DAY_IN_SECONDS / getAverageBlockTimeSecs(chainId))

package.json

@@ -69,7 +69,7 @@
     "@uniswap/permit2-sdk": "^1.4.0",
     "@uniswap/sdk-core": "^7.18.0",
     "@uniswap/signer": "^0.0.4",
-    "@uniswap/uniswapx-sdk": "3.0.10",
+    "@uniswap/uniswapx-sdk": "3.1.0",
     "@uniswap/universal-router-sdk": "^4.18.1",
     "aws-cdk-lib": "2.200.1",
     "aws-embedded-metrics": "^4.1.0",

swagger.json

@@ -362,7 +362,7 @@
       "ChainId": {
         "type": "number",
         "description": "Chains supported by UniswapX.",
-        "enum": [1, 10, 56, 130, 137, 143, 196, 480, 1301, 1868, 4217, 4663, 5042, 8453, 42161, 42220, 43114, 81457, 7777777, 11155111],
+        "enum": [1, 10, 56, 130, 137, 143, 196, 480, 1301, 1868, 4217, 4663, 5042, 8453, 42161, 42220, 43114, 57073, 81457, 7777777, 11155111],
         "example": 1
       },
       "OrderStatus": {

yarn.lock

@@ -4702,6 +4702,23 @@
     toformat "^2.0.0"
     tslib "^2.3.0"
 
+"@uniswap/sdk-core@^7.19.1":
+  version "7.19.1"
+  resolved "https://registry.yarnpkg.com/@uniswap/sdk-core/-/sdk-core-7.19.1.tgz#2a91e1eb777efa5af159802ed14cf4c60bbbf8fc"
+  integrity sha512-3M8T1JXjy3Ypz/yKC9w75PH5EwpVgFIU5E7V8dI7+CBaZ2wr2RZeVlBrhJljdyGWYLjHT7owtA+SrOcwnhN2fA==
+  dependencies:
+    "@ethersproject/address" "^5.0.2"
+    "@ethersproject/bignumber" "^5.5.0"
+    "@ethersproject/bytes" "^5.7.0"
+    "@ethersproject/keccak256" "5.7.0"
+    "@ethersproject/strings" "5.7.0"
+    big.js "^5.2.2"
+    decimal.js-light "^2.5.0"
+    jsbi "^3.1.4"
+    tiny-invariant "^1.1.0"
+    toformat "^2.0.0"
+    tslib "^2.3.0"
+
 "@uniswap/sdk-core@^7.5.0":
   version "7.7.2"
   resolved "https://registry.npmjs.org/@uniswap/sdk-core/-/sdk-core-7.7.2.tgz#dc3a9b63b343640754860dce05d06972815eaee6"
@@ -4738,16 +4755,16 @@
     dotenv "^14.2.0"
     hardhat-watcher "^2.1.1"
 
-"@uniswap/uniswapx-sdk@3.0.10":
-  version "3.0.10"
-  resolved "https://registry.yarnpkg.com/@uniswap/uniswapx-sdk/-/uniswapx-sdk-3.0.10.tgz#6fdb915b06fa98b4bccd11aa4a1df3c3ffb1d099"
-  integrity sha512-SBEAKsNQFFm3WB9sZs6bqAFnyOLVV0YNqBTknYm/4tJdtBYXUKdRMaHjk20Xh9gzf/QFhM+IsxBhv0pnuHpBFQ==
+"@uniswap/uniswapx-sdk@3.1.0":
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/@uniswap/uniswapx-sdk/-/uniswapx-sdk-3.1.0.tgz#ca8aa7eef979e41dfa391992f1f024cf65bdd133"
+  integrity sha512-scWOSHC+bJosuZYGIX3rGTlApsEuwVKEdJ1PdHDzIpdJhOe14s4hSv3zAcbPBk9fk8b1oBjEerZeuLhI/HgcDQ==
   dependencies:
     "@ethersproject/abi" "^5.5.0"
     "@ethersproject/bytes" "^5.7.0"
     "@ethersproject/providers" "^5.7.0"
     "@uniswap/permit2-sdk" "^1.4.0"
-    "@uniswap/sdk-core" "^7.18.0"
+    "@uniswap/sdk-core" "^7.19.1"
     ethers "^5.7.0"
     tiny-invariant "^1.1.0"