A multichain world
- Ethereum
- Rollups, L2s, sidechains...
- Other L1s
How to transfer liquidity between
all the different networks ?
The cross-chain
communication problem
Chain A
Anne
Chain B
LockOrSendFunds()
MintOrWithdrawFunds()
How to verify the funds have been properly sent on chain A ?
The cross-chain communication methods
- Trusted third-party (Binance Panama Bridge)
- Custom POS chains/L2/state channels (Celer Guardian Network)
- Atomic locks with whitelisted network of relayers (Connext)
- Hybrid systems of nodes that collectively sign transactions (Multichain's SMPC nodes)
- HTLCs (Nuclear Bridge)
Warpgate
Enable cross-domain transfer
with very light clients
Very light clients
Verify
the chain A transaction
directly from chain B
A very light client to verify
Ethereum post-merge transactions
from Aleph Zero
A block
Block hash
Block header
Transaction
Transaction
Transaction
Transaction
Transaction
Transaction
Transaction
Transaction
Transaction
transactionRoot
A transaction
- chainId
- nonce
- maxPriorityFeePerGas
- maxFeePerGas
- gasLimit
- to
- value
- data
- signature (v, r, s)
Transaction hash
Verify a transaction is in a block
txRoot
txHash1
txHash2
txHash3
txHash4
hash(A+B)
A
B
C
D
hash(C+D)
What's next
- Implement the Very Light Client with native Ink!
- Implement the sync committee consensus to verify the block headers (or another trusted source for the block header)
ETA: a few months
