Commits on Nov 13, 2024

1. eth v1 contract …

   Implements the version 1 contracts for ethereum and tokens. Based
   on feedback in decred#1426, everything is now encoded in the
   "contract data". This "contract data", is the msgjson.Init.Contract
   -> msgjson.Audit.Contract -> MatchMetaData.Proof.CounterContract,
   AuditInfo.Contract -> Redemption.Spends.Contract.
   
   A few new terms are introduced to differentiate various encodings and
   data sets. The aforementioned contract data did encode a version
   and a secret hash. It now encodes a version and a "locator", which is
   a []byte whose length and content depend on the version. For
   version 0, the locator is still just the secretHash[:]. For v1,
   the locator encodes all of the immutable data that defines the
   swap. This immutable data is now collected in something called
   a "vector" (dexeth.SwapVector). For version 0, some vector data
   is stored on-chain indexed by the secret hash. For version 1, all
   vector data is encoded in the locator.
   
   I've also made an effort to standardize the use of status/step,
   and eliminated the use of ambiguous "ver" variables throughout.
   A "status" is now the collection of mutable contract data: the step,
   the init block height, and the secret. The status and vector
   collectively fully characterize the swap.
   
   client/asset/eth:
   New contractV1 and tokenContractorV1 interfaces. To avoid duplication,
   the ERC20 parts of the tokenContractors are separated into a new type
   erc20Contractor that is embedded by both versions. Getters for
   status and vector are added in place of the old method "swap".
   
   assetWallet and embedding types are updated to work with the new
   version-dependent locators and the status and vector model.
   
   dex/networks/{eth,erc20}:
   New contracts added. New methods for dealing with locators. Simnet
   entries added for eth and dextt.eth in the ContractAddresses and Tokens
   maps. txDataHandler interace is replaced with versioned package-level
   functions.
   
   server/asset/eth:
   Server is fully switched to version 1. No option to use version 0.
   Translation to new version was straightforward, with one notable
   difference that we can no longer get a block height from the
   contract once the swap is redeemed.

   

   buck54321 committed Nov 13, 2024
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