# Eth Bridge
## Architecture
* Users/Accounts on Namada
* Vault accounts on Namada and Eth
* Ethereum contracts

## Protocol
1. Blockchain A(initiator) with tokens $a,b,c$ (namada)
2. Blockchain B(destinator) with tokens $d,e,f$ (ETH20-Eth)
3. User U from blockchain A with N tokens of type $a$ wants to exhange $n$ $a$’s for $m$ $d$’s within a transaction object, $td$.
4. A initiates a transaction $td$ with $n$ tokens of type $a$ on a special vault account. The validators validate that transaction is valid and execute it->tokens are locked.
5. Somehow (how?) destinator blockchain through a smart contract is informed that A has locked $n$ tokens of type $a$ and wants in exchange the equivalent value of tokens in blockchain B.
8. B blockchain creates a voucher which authorizes the creation of m d’s to bc B and are equivalent to n d’s of bc A. (how does that look in practise?what is a voucher)

Point 3. We never trade tokens on bridges. We mint/burn or escrow/de-escrow. Escrowing on one side means minting a new token on the other.

4.10.23
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* Nam -> Eth explicit by users
* Eth->Nam with eth full node on namada and contracts on Eth
* Went through code. Need to delve into more: https://drive.google.com/file/d/1g10L7dzZ4kYZ4eZ8g9A1CpVKf3YdD-OD/view

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