[Staking]: support transaction for ETH/NEAR/ELROND

[Milerius]

Is your feature request related to a problem? Please describe.

Adding staking transaction to the following blockchains: eth,near,elrond.

Checklist

Ethereum

• [ ] Simple smart contract call transaction with existing staking pool like lido
  • [ ] C++ Unit test + tx url for the lido staking transaction
  • [ ] Swift Unit test
  • [ ] Kotlin Unit test

Near

Add tests to mainnet for: https://github.com/trustwallet/wallet-core/blob/55993e9b9418d5af30e1138455076343445e5071/tests/chains/NEAR/TWAnySignerTests.cpp#L40

Elrond

• [x] Use generic action - Merged in #2675
• [x] C++ unit tests - Merged in #2675
• [x] Swift unit tests - Merged in #2675
• [x] Kotlin unit tests - Merged in #2675

Resources

Lido Lido Deployed Smart Contract Other eth staking solutions Staking Rewards Elrond + FAQ Staking Rewards NEAR + FAQ

[hewigovens]

Lido / Rocket pool