[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Network](./puppeteer.protocol.network.md) > [SignedExchangeError](./puppeteer.protocol.network.signedexchangeerror.md) > [signatureIndex](./puppeteer.protocol.network.signedexchangeerror.signatureindex.md) ## Protocol.Network.SignedExchangeError.signatureIndex property The index of the signature which caused the error. Signature: ```typescript signatureIndex?: integer; ```