Error when trying to use seaport events

[ssa3512]

Ethers Version

6.6.4

Search Terms

No response

Describe the Problem

Getting an error when attempting to get an event from the OpenSea Seaport 1.5 contract in ethers v6.

Code Snippet

const seaport: Interface = new Interface(Seaport1_5Abi);
const orderFulfilled = seaport.getEvent(
  "OrderFulfilled(bytes32,address,address,address,tuple[],tuple[])"
);

Contract ABI

[    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": false,
          "internalType": "bytes32",
          "name": "orderHash",
          "type": "bytes32"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "offerer",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "zone",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "address",
          "name": "recipient",
          "type": "address"
        },
        {
          "components": [
            {
              "internalType": "enum ItemType",
              "name": "itemType",
              "type": "uint8"
            },
            {
              "internalType": "address",
              "name": "token",
              "type": "address"
            },
            {
              "internalType": "uint256",
              "name": "identifier",
              "type": "uint256"
            },
            {
              "internalType": "uint256",
              "name": "amount",
              "type": "uint256"
            }
          ],
          "indexed": false,
          "internalType": "struct SpentItem[]",
          "name": "offer",
          "type": "tuple[]"
        },
        {
          "components": [
            {
              "internalType": "enum ItemType",
              "name": "itemType",
              "type": "uint8"
            },
            {
              "internalType": "address",
              "name": "token",
              "type": "address"
            },
            {
              "internalType": "uint256",
              "name": "identifier",
              "type": "uint256"
            },
            {
              "internalType": "uint256",
              "name": "amount",
              "type": "uint256"
            },
            {
              "internalType": "address payable",
              "name": "recipient",
              "type": "address"
            }
          ],
          "indexed": false,
          "internalType": "struct ReceivedItem[]",
          "name": "consideration",
          "type": "tuple[]"
        }
      ],
      "name": "OrderFulfilled",
      "type": "event"
    }]

Errors

/sales-listener/node_modules/ethers/src.ts/abi/fragments.ts:235
        if (top.type !== "OPEN_PAREN") { throw new Error("bad start"); }

Environment

No response

Environment (Other)

No response

[ricmoo]

Investigating…

[ricmoo]

Oh. So your tuple isn't defined. You cannot have a bare tuple[], it must have its components defined:

const orderFulfilled = seaport.getEvent(
  // "OrderFulfilled(bytes32,address,address,address,tuple[],tuple[])"
  "OrderFulfilled(bytes32,address,address,address,tuple(uint8,address,uint256,uint256)[],tuple(uint8,address,uint256,uint256,address)[])"
  );

I agree the error is misleading; it took me some investigating as I didn't see it at first either. I should throw a better error in those cases, basically the missing ( was after the first tuple keyword, which expects (in the lexer) KEYWORD:tuple OPEN_PAREN { PARAMS } CLOSE_PAREN and it saw KEYWORD:tuple OPEN_BRACKET.

Does that make sense?

[ssa3512]

Ah okay, yes this makes sense. I assumed that somehow the ABI would be read to extract the "internalType": "struct ReceivedItem[]" structure and map it in the results.

Thanks for the clarification.

[ricmoo]

Better errors are now available in v6.6.5, which will indicate which string is causing the issue.

Please let me know if you have any more suggestions.

Thanks! :)