eth

Documentation

Overview

Package eth test eth router by implementing `tokens.IBridge` interface. this testing implementation is using the product `token/eth` impl. this way implementation is just an example, in reality we need impl the `tokens.IBridge` interface from scratch, and take it into the product implementation after this testing is passed.

Index

• type Bridge
  • func NewCrossChainBridge() *Bridge
  • func (b *Bridge) BuildRawTransaction(args *tokens.BuildTxArgs) (rawTx interface{}, err error)
  • func (b *Bridge) GetLatestBlockNumber() (uint64, error)
  • func (b *Bridge) GetLatestBlockNumberOf(url string) (uint64, error)
  • func (b *Bridge) GetTransaction(txHash string) (interface{}, error)
  • func (b *Bridge) GetTransactionStatus(txHash string) (*tokens.TxStatus, error)
  • func (b *Bridge) InitAfterConfig()
  • func (b *Bridge) IsValidAddress(address string) bool
  • func (b *Bridge) MPCSignTransaction(rawTx interface{}, args *tokens.BuildTxArgs) (signedTx interface{}, txHash string, err error)
  • func (b *Bridge) RegisterSwap(txHash string, args *tokens.RegisterArgs) ([]*tokens.SwapTxInfo, []error)
  • func (b *Bridge) SendTransaction(signedTx interface{}) (txHash string, err error)
  • func (b *Bridge) VerifyMsgHash(rawTx interface{}, msgHash []string) error
  • func (b *Bridge) VerifyTransaction(txHash string, ars *tokens.VerifyArgs) (*tokens.SwapTxInfo, error)

Types

type Bridge

type Bridge struct {
	*ethpro.Bridge
}

Bridge bridge impl struct

func NewCrossChainBridge

func NewCrossChainBridge() *Bridge

NewCrossChainBridge new bridge instance

func (*Bridge) BuildRawTransaction

func (b *Bridge) BuildRawTransaction(args *tokens.BuildTxArgs) (rawTx interface{}, err error)

BuildRawTransaction build tx with specified args.

func (*Bridge) GetLatestBlockNumber

func (b *Bridge) GetLatestBlockNumber() (uint64, error)

GetLatestBlockNumber get latest block number through gateway urls. used in `GetRouterSwap` server rpc.

func (*Bridge) GetLatestBlockNumberOf

func (b *Bridge) GetLatestBlockNumberOf(url string) (uint64, error)

GetLatestBlockNumberOf get latest block number of specified url. used in `AdjustGatewayOrder` function.

func (*Bridge) GetTransaction

func (b *Bridge) GetTransaction(txHash string) (interface{}, error)

GetTransaction get tx by hash.

func (*Bridge) GetTransactionStatus

func (b *Bridge) GetTransactionStatus(txHash string) (*tokens.TxStatus, error)

GetTransactionStatus get tx status by hash. get tx related infos like block height, confirmations, receipts etc. These infos is used to verify tx is acceptable. you can extend `TxStatus` if fields in it is not enough to do the checking.

func (*Bridge) InitAfterConfig

func (b *Bridge) InitAfterConfig()

InitAfterConfig init variables (ie. extra members) after loading config

func (*Bridge) IsValidAddress

func (b *Bridge) IsValidAddress(address string) bool

IsValidAddress check if given `address` is valid on this chain. prevent swap to an invalid `bind` address which will make assets loss.

func (*Bridge) MPCSignTransaction

func (b *Bridge) MPCSignTransaction(rawTx interface{}, args *tokens.BuildTxArgs) (signedTx interface{}, txHash string, err error)

MPCSignTransaction mpc sign tx.

func (*Bridge) RegisterSwap

func (b *Bridge) RegisterSwap(txHash string, args *tokens.RegisterArgs) ([]*tokens.SwapTxInfo, []error)

RegisterSwap register swap. used in `RegisterRouterSwap` server rpc.

func (*Bridge) SendTransaction

func (b *Bridge) SendTransaction(signedTx interface{}) (txHash string, err error)

SendTransaction send signed raw tx.

func (*Bridge) VerifyMsgHash

func (b *Bridge) VerifyMsgHash(rawTx interface{}, msgHash []string) error

VerifyMsgHash verify message hash is same. 'message hash' here is the real content (usually a hash) which will be signed. used in `accept` work for oracles to replay the same tx on destination chain. oracle will only accept a sign info if and only if the oracle can verify the tx and rebuild a tx and ensure the message hash is same.

func (*Bridge) VerifyTransaction

func (b *Bridge) VerifyTransaction(txHash string, ars *tokens.VerifyArgs) (*tokens.SwapTxInfo, error)

VerifyTransaction verify swap tx is valid and success on chain with needed confirmations.