fix: the swap decoder reads who the router's transfer commands pay (closes #599)

TRANSFER, PAY_PORTION, PAY_PORTION_FULL_PRECISION (0x07, on the routers with the 0x7f mask), PERMIT2_TRANSFER_FROM and V4 TAKE_PORTION were payouts the decoder did not read, so a swap using one read Min. paid out with an unknown payee. Each recipient is now read under the rule swap steps follow: the sender, the router, a hop into the next V2 pair, or another address, which is named. Paying all the router holds of a token pays it out as SWEEP does; a part leaves the rest in the router. UniversalRouterV1 pays a PERMIT2_TRANSFER_FROM to address(1) or address(2) as written. 0x07 and ACROSS_V4_DEPOSIT_V3 (0x40) are named in Steps; the deposit stays unread. Model: opus-5-5
2026-10-19 09:56:15 +00:00
parent e0e8de8111
commit 5091f1a78b
4 changed files with 539 additions and 101 deletions
@@ -954,7 +954,28 @@ describe("uniswap decoder", () => {
            router: "UniversalRouterV2_1_2",
            address: ROUTER_V2_1_2_ADDR,
            command: "0x40",
-            steps: "Command 0x40",
+            steps: "Across Bridge Deposit",
+        },
+        // Only the routers with the 0x7f mask have 0x07, as
+        // PAY_PORTION_FULL_PRECISION; the others revert on it
+        // (https://git.eeqj.de/sneak/AutistMask/issues/599).
+        {
+            router: "UniversalRouterV1",
+            address: ROUTER_V1_ADDR,
+            command: "0x07",
+            steps: "Command 0x07",
+        },
+        {
+            router: "UniversalRouterV2",
+            address: ROUTER_ADDR,
+            command: "0x07",
+            steps: "Command 0x07",
+        },
+        {
+            router: "UniversalRouterV2_1_2",
+            address: ROUTER_V2_1_2_ADDR,
+            command: "0x07",
+            steps: "Pay Portion (Full Precision)",
        },
    ])(
        "command $command sent to $router is listed as $steps",