Cosmin Damian

> Polkadot need SignedExtensionName `PrevalidateAttests` Please try again using the latest version here.

> Hey @cdamian I am using the method "NetworkMembership.nominate" in creating a NewCall for a custom polkadot chain and it is throwing `panic: creating payload: signed extension 'CheckNetworkMembership' is not...

@kartikaysaxena is there a websocket address that I can use in the polkadot JS app, such as - https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fpolkadot.api.onfinality.io%2Fpublic-ws#/explorer?

Hi @kartikaysaxena , according to the signed extra found [here](https://github.com/dhiway/cord/blob/develop/pallets/network-membership/src/lib.rs#L401), there are no additional fields required in the payload or signature. Please test using the latest version here and let...

@kartikaysaxena This [gist](https://gist.github.com/cdamian/5107eb52feb03ed13dd474d219eb8163) is what I used when testing this, with a local docker container: ``` docker run -d -p 9944:9944 -p 30333:30333 -p 9933:9933 -p 9615:9615 -v cord:/tmp/data dhiway/cord:develop...

@freddyli7 can you please share a URI for this chain so we can test this?

@YuXiaoCoder Please check the following issue for more details about signing and submitting transactions: https://github.com/centrifuge/go-substrate-rpc-client/pull/389

Hey, This could be due to the fact that your chain has different `SignedExtra` defined. This might require a different kind of `SignatureOptions` that use something else instead of the...

> LGTM! Thanks @cdamian. > > A question, the check of line: https://github.com/centrifuge/centrifuge-chain/pull/1980/files#diff-d763817d4b90117d6295fc32e8fd8a66d2ee4093bfb40d90941a3368e72aa099R244-R247 makes sense? I mean, should we treat the forward info domain as a whitelist for domains? I...

@YuXiaoCoder Please try using the latest version of [dynamic extrinsic signing](https://github.com/centrifuge/go-substrate-rpc-client/pull/389), and by using these extensions when signing in your first example: ``` err = ext.Sign( keyPair, meta, extrinsic.WithEra(types.ExtrinsicEra{IsImmortalEra: true},...