[bug] The signature obtained from Coinbase smartWalletOnly fails to parse.

[SeascapeDongxu]

Is there an existing issue for this?

• I have searched the existing issues

RainbowKit Version

2.1.7

wagmi Version

2.12.16

Current Behavior

When signing with MetaMask, the signature obtained is: 0x3b52c537a63938cb90cb84f3751c904a01aa503eef289fae193836fbfa40712b22e0c2699cb3708ca2dfcad2a96ca8d8e2e7ffea8b06d0143a5da815f7b8d0xxx

When signing with Coinbase smartWalletOnly, the signature obtained is: 0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000260000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000170000000000000000000000000000000000000000000000000000000000000001d9894880f36b776d400b542362da6ce984c5919795d6c6edc2aee48819b751f20906ae49ce32856ec1ee3c6d22d1a7145b43197260a35115c9a33e84886cf8fc0000000000000000000000000000000000000000000000000000000000000025f198086b2db17256731bc456673b96bcef23f51d1fbacdd7c4379ef65465572f1d0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f77b2274797065223a22776562617574686e2e676574222c226368616c6c656e6765223a223864387730513962597a38463579584263716e7476736b6b486954476c6c6952446c4a4d367a6a77324659222c226f726967696e223a2268747470733a2f2f6b6579732e636f696e626173652e636f6d222c2263726f73734f726967696e223a66616c73652c226f746865725f6b6579735f63616e5f62655f61646465645f68657265223a22646f206e6f7420636f6d7061726520636c69656e74446174614a534f4e20616761696e737420612074656d706c6174652e205365652068747470733a2f2f676f6f2e676c2f79616250657xxxxd000000000000000000

Why are the formats and lengths of the two signatures inconsistent? This inconsistency causes parsing errors on our side. Should I implement custom parsing logic specifically for Coinbase signatures? Ideally, shouldn’t users receive signatures in a consistent format regardless of the wallet used?

Expected Behavior

No response

Steps To Reproduce

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Link to Minimal Reproducible Example (CodeSandbox, StackBlitz, etc.)

No response

Anything else?

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[linear]

RK-138 [bug] <title> The signature strings obtained after signing with MetaMask and Coinbase smartWalletOnly during custom authentication have inconsistent formats and lengths.