Implement `state_getReadProof` RPC call

[EclesioMeloJunior]

Task summary

• Implement state_getReadProof RPC call

Specification reference

• Spec reference

Other information and links

• N/A

[EclesioMeloJunior]

Blocks: the proofs generated by the gossamer node are not equals to the ones generated by the substrate node to the same block and the same storage key

[EclesioMeloJunior]

following the @noot suggestion I've set up a substrate node and the gossamer node together using chain polkadot --chain polkadot, after some sync I generate proof in both nodes for the block 19000 with the same storage key

1 - Gossamer node proof

2 - Substrate node proof

An interesting fact is that: the state root of block 19000 is 0xaf35bdd05f5fc75f6f4d833c9edd90bc23ab0f176fe5b597bd9860b5dcf70c99 and in the gossamer proof it's possible to see that root, but in the substrate proof the state root doesn't appear

@dutterbutter fyi

[EclesioMeloJunior]

The right proof generation algo is implemented at https://github.com/paritytech/trie repository

[github-actions]

🎉 This issue has been resolved in version 0.6.0 🎉

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