[Protocol Integration]: Solana

[Milerius]

I'm currently implementing Solana

Done:

• Balance
• Balance SPL (Solana Program Library tokens)
• Current Block
• Withdraw (Solana)
• Send raw transaction

Open discussion:

• I propose for Solana a new configuration:

{
  "coin": "SOL",
  "name": "solana",
  "protocol": {
    "type": "SOL",
    "tokens": {
      "USDC": {
        "decimals": 6,
        "address": "CpMah17kQEL2wqyMKt3mZBdTnZbkbfx4nqmQMFDP5vwp"
      }
    }
  },
  "rpcport": 80,
  "mm2": 1
}

• my_balance (v2) may have the following signature: my_balance(token: Option<String>)
• usage solana_coin.my_balance("USDC-SPL")
• my_balance_tokens (dispatcher v2) -> return all the token balance at once (more optimal in terms of rate limit.)

Problems:

• I'm not able to compile in WASM yet
• On Linux libudev need to be installed for the CI.
• Our current rust version doesn't compile with Solana SDK, I had to modify one file locally:

 --> /home/azureagent/.cargo/git/checkouts/rust-libp2p-98135dbcf5b63918/20183c1/transports/noise/src/protocol/x25519.rs:221:45
    |
221 |         curve25519_sk.copy_from_slice(&hash.as_ref()[..32]);
    |                                        -----^^^^^^--
    |                                        |    |
    |                                        |    cannot infer type for type parameter `T` declared on the trait `AsRef`
    |                                        this method call resolves to `&T`
    |
    = note: type must be known at this point

• Solana Client have rates limit
• HTLC capability are not so easy topics
• Solana doesn't implement tx confirmations but instead a commitment:

     /// The highest slot of the heaviest fork processed by the node. Ledger state at this slot is
    /// not derived from a confirmed or finalized block, but if multiple forks are present, is from
    /// the fork the validator believes is most likely to finalize.
    Processed,

    /// The highest slot that has been voted on by supermajority of the cluster, ie. is confirmed.
    /// Confirmation incorporates votes from gossip and replay. It does not count votes on
    /// descendants of a block, only direct votes on that block, and upholds "optimistic
    /// confirmation" guarantees in release 1.3 and onwards.
    Confirmed,

    /// The highest slot having reached max vote lockout, as recognized by a supermajority of the
    /// cluster.
    Finalized,

example of a transaction

• Research if a better secret hash algorithm can be used for solana

[smk762]

Related desktop PR: https://github.com/KomodoPlatform/atomicDEX-Desktop/pull/1679

[artemii235]

• [ ] Unignore tests when integration proceeds.

[shamardy]

Removing solana implementation from KDF for now as it hinders our ability to update other KDF dependencies, the old ref. implementation is here https://github.com/KomodoPlatform/komodo-defi-framework/tree/solana-ref-impl