0

I am trying to retrieve offers detail using seaport API for a given asset contract for a given token ID but it returns null for the signature field. My understanding is that this signature is the signature from the offerer. and if I wanna accept the offer by calling the seaport fulfillBasicOrder_efficient_6GL6yc function or any other similar function to fulfill the order directly via etherscan I need to pass the signature.

My question is why is testnet API returning null for offer that is created and I can see on opeansea?

Also, what is the exact JSON format for an order that the offerer sign, I tried to create this signature locally for testnet by using mycrypto/sign-message

I tried using parameter JSON (returned by API call) and stringify it but couldn’t pass fulfillBasicOrder_efficient_6GL6yc function call transaction-simulator it fails at Seaport. _assertValidSignature

{"offerer":"0xb1e020029EBAe05673Fc9166E12A8FC603da976C","offer":[{"itemType":1,"token":"0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6","identifierOrCriteria":0,"startAmount":"10000000000000000","endAmount":"10000000000000000"},{"itemType":2,"token":"0x6548606B21C1DE801dbD5497ce9796AfF3E48eE3","identifierOrCriteria":88,"startAmount":"1","endAmount":"1","recipient":"0xb1e020029EBAe05673Fc9166E12A8FC603da976C"},{"itemType":1,"token":"0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6","identifierOrCriteria":0,"startAmount":"250000000000000","endAmount":"250000000000000","recipient":"0x0000a26b00c1F0DF003000390027140000fAa719"}],"startTime":1680858299,"endTime":1683450273,"orderType":0,"zone":"0x004C00500000aD104D7DBd00e3ae0A5C00560C00","zoneHash":"0x0000000000000000000000000000000000000000000000000000000000000000","salt":"24446860302761739304752683030156737591518664810215442929811069269589987966261","conduitKey":"0x0000007b02230091a7ed01230072f7006a004d60a8d4e71d599b8104250f0000","counter":0}

Additionally, I am open to any alternative solutions that achieve the same goal. Thanks

enter image description here

2
  • I have the same issue. Any luck finding a solution?
    – ztnark
    Apr 18, 2023 at 14:22
  • I ended up writing a script to generate signatures locally. Since it is testnet order for which I wanted a signature to fulfill, that belongs to me. so, it is possible to generate signatures locally for testing. I am using opensea-js. Apr 19, 2023 at 15:29

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.