bridge

package
v0.0.0-...-5ade1b4 Latest Latest
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 Go to latest Published: Sep 9, 2020 License: Apache-2.0 Imports: 35 Imported by: 3

Documentation

Index

Constants

View Source 
const (
	// TFTBlockDelay is the amount of blocks to wait before
	// pushing tft transactions to the ethereum contract
	TFTBlockDelay = 6
	// EthBlockDelay is the amount of blocks to wait before
	// pushing eth transaction to the tfchain network
	EthBlockDelay = 30
)

Variables

View Source 
var (
	// ErrNoAccountLoaded is an error returned for all Light Client methods
	// that require an account and for which no account is loaded.
	ErrNoAccountLoaded = errors.New("no account was loaded into the light client")
)

Functions

func Denominate 

func Denominate(gwei *big.Int) string

Denominate converts gwei units into ether units

func IsNoPeerErr 

func IsNoPeerErr(err error) bool

IsNoPeerErr checks if an error is means an ethereum client could not execute a call because it has no valid peers

Types

type Bridge 

type Bridge struct {
	// contains filtered or unexported fields
}

Bridge is a high lvl structure which listens on contract events and bridge-related tfchain transactions, and handles them

func NewBridge 

func NewBridge(cs modules.ConsensusSet, tp modules.TransactionPool, ethPort uint16, accountJSON, accountPass string, ethNetworkName string, bootnodes []string, contractAddress string, datadir string, bcInfo types.BlockchainInfo, chainCts types.ChainConstants, txVersions erc20types.TransactionVersions, cancel <-chan struct{}) (*Bridge, error)

NewBridge creates a new Bridge.

func (*Bridge) Close 

func (bridge *Bridge) Close() error

Close bridge

func (*Bridge) GetBridgeContract 

func (bridge *Bridge) GetBridgeContract() *BridgeContract

GetBridgeContract returns this bridge's contract.

func (*Bridge) GetClient 

func (bridge *Bridge) GetClient() *LightClient

GetClient returns bridgecontract lightclient

func (*Bridge) ProcessConsensusChange 

func (bridge *Bridge) ProcessConsensusChange(css modules.ConsensusChange)

ProcessConsensusChange implements modules.ConsensusSetSubscriber, used to apply/revert blocks.

func (*Bridge) Start 

func (bridge *Bridge) Start(cs modules.ConsensusSet, erc20Registry erc20types.ERC20Registry, cancel <-chan struct{}) error

Start the main processing loop of the bridge

type BridgeContract 

type BridgeContract struct {
	// contains filtered or unexported fields
}

BridgeContract exposes a higher lvl api for specific contract bindings. In case of proxy contracts, the bridge needs to use the bindings of the implementation contract, but the address of the proxy.

func NewBridgeContract 

func NewBridgeContract(networkName string, bootnodes []string, contractAddress string, port int, accountJSON, accountPass string, datadir string, cancel <-chan struct{}) (*BridgeContract, error)

NewBridgeContract creates a new wrapper for an allready deployed contract

func (*BridgeContract) ABI 

func (bridge *BridgeContract) ABI() abi.ABI

ABI returns the parsed and bound ABI driving this bridge contract

func (*BridgeContract) AccountAddress 

func (bridge *BridgeContract) AccountAddress() (common.Address, error)

AccountAddress returns the account address of the bridge contract

func (*BridgeContract) Close 

func (bridge *BridgeContract) Close() error

Close terminates the Ethereum connection and tears down the stack.

func (*BridgeContract) EthBalance 

func (bridge *BridgeContract) EthBalance() (*big.Int, error)

func (*BridgeContract) GetContractAdress 

func (bridge *BridgeContract) GetContractAdress() common.Address

GetContractAdress returns the address of this contract

func (*BridgeContract) GetPastWithdraws 

func (bridge *BridgeContract) GetPastWithdraws(startHeight uint64, endHeight *uint64) ([]WithdrawEvent, error)

GetPastWithdraws gets a list of past withdraw events between two block numbers

func (*BridgeContract) IsMintTxID 

func (bridge *BridgeContract) IsMintTxID(txID string) (bool, error)

func (*BridgeContract) IsWithdrawalAddress 

func (bridge *BridgeContract) IsWithdrawalAddress(address erc20types.ERC20Address) (bool, error)

func (*BridgeContract) LightClient 

func (bridge *BridgeContract) LightClient() *LightClient

LightClient returns the LightClient driving this bridge contract

func (*BridgeContract) Loop 

func (bridge *BridgeContract) Loop(ch chan<- *types.Header)

Loop subscribes to new eth heads. If a new head is received, it is passed on the given channel, after which the internal stats are updated if no update is already in progress

func (*BridgeContract) Mint 

func (bridge *BridgeContract) Mint(receiver erc20types.ERC20Address, amount *big.Int, txID string) error

func (*BridgeContract) Refresh 

func (bridge *BridgeContract) Refresh(head *types.Header) error

Refresh attempts to retrieve the latest header from the chain and extract the associated bridge balance and nonce for connectivity caching.

func (*BridgeContract) RegisterWithdrawalAddress 

func (bridge *BridgeContract) RegisterWithdrawalAddress(address erc20types.ERC20Address) error

func (*BridgeContract) SubscribeMint 

func (bridge *BridgeContract) SubscribeMint() error

SubscribeMint subscribes to new Mint events on the given contract. This call blocks and prints out info about any mint as it happened

func (*BridgeContract) SubscribeRegisterWithdrawAddress 

func (bridge *BridgeContract) SubscribeRegisterWithdrawAddress() error

SubscribeRegisterWithdrawAddress subscribes to new RegisterWithdrawalAddress events on the given contract. This call blocks and prints out info about any RegisterWithdrawalAddress event as it happened

func (*BridgeContract) SubscribeTransfers 

func (bridge *BridgeContract) SubscribeTransfers() error

SubscribeTransfers subscribes to new Transfer events on the given contract. This call blocks and prints out info about any transfer as it happened

func (*BridgeContract) SubscribeWithdraw 

func (bridge *BridgeContract) SubscribeWithdraw(wc chan<- WithdrawEvent, startHeight uint64) error

SubscribeWithdraw subscribes to new Withdraw events on the given contract. This call blocks and prints out info about any withdraw as it happened

func (*BridgeContract) TokenBalance 

func (bridge *BridgeContract) TokenBalance(address common.Address) (*big.Int, error)

func (*BridgeContract) TransferFunds 

func (bridge *BridgeContract) TransferFunds(recipient common.Address, amount *big.Int) error

TransferFunds transfers funds from one address to another

func (*BridgeContract) WatchWithdraw 

func (bridge *BridgeContract) WatchWithdraw(opts *bind.WatchOpts, sink chan<- *contract.TTFT20Withdraw, receiver []common.Address) (event.Subscription, error)

WatchWithdraw is a free log subscription operation binding the contract event 0x884edad9ce6fa2440d8a54cc123490eb96d2768479d49ff9c7366125a9424364.

Solidity: e Withdraw(receiver indexed address, tokens uint256)

This method is copied from the generated bindings and slightly modified, so we can add logic to stay backwards compatible with the old withdraw event signature

type LightClient 

type LightClient struct {
	*ethclient.Client // Client connection to the Ethereum chain
	// contains filtered or unexported fields
}

LightClient creates a light client that can be used to interact with the Ethereum network, for ERC20 purposes. By default it is read-only, in order to also write to the network, you'll need load an account using the LoadAccount method.

func NewLightClient 

func NewLightClient(lccfg LightClientConfig) (*LightClient, error)

NewLightClient creates a new light client that can be used to interact with the ETH network. See `LightClient` for more information.

func (*LightClient) AccountAddress 

func (lc *LightClient) AccountAddress() (common.Address, error)

AccountAddress returns the address of the loaded account, returning an error only if no account was loaded.

func (*LightClient) AccountBalanceAt 

func (lc *LightClient) AccountBalanceAt(ctx context.Context, blockNumber *big.Int) (*big.Int, error)

AccountBalanceAt returns the balance for the account at the given block height.

func (*LightClient) Close 

func (lc *LightClient) Close() error

Close terminates the Ethereum connection and tears down the stack.

func (*LightClient) FetchTransaction 

func (lc *LightClient) FetchTransaction(ctx context.Context, blockHash common.Hash, txHash common.Hash) (*types.Transaction, uint64, error)

FetchTransaction fetches a transaction from a remote peer using its block hash and tx index (within that block). Together with a found transactions it also returns the confirmations available for that Tx.

func (*LightClient) GetBalanceInfo 

func (lc *LightClient) GetBalanceInfo() (*erc20types.ERC20BalanceInfo, error)

GetBalanceInfo returns bridge ethereum address and balance

func (*LightClient) GetStatus 

func (lc *LightClient) GetStatus() (*erc20types.ERC20SyncStatus, error)

GetStatus implements ERC20TransactionValidator.GetStatus

func (*LightClient) LoadAccount 

func (lc *LightClient) LoadAccount(accountJSON, accountPass string) error

LoadAccount loads an account into this light client, allowing writeable operations using the loaded account. An error is returned in case no account could be loaded.

func (*LightClient) SignTx 

func (lc *LightClient) SignTx(tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)

SignTx signs a given traction with the loaded account, returning the signed transaction and no error on success.

func (*LightClient) Synchronising 

func (lc *LightClient) Synchronising() bool

Synchronising returns a boolean if the ethereum client is syncing or not

func (*LightClient) Wait 

func (lc *LightClient) Wait(ctx context.Context) error

type LightClientConfig 

type LightClientConfig struct {
	Port    int
	DataDir string

	BootstrapNodes []*enode.Node
	NetworkName    string
	NetworkID      uint64
	GenesisBlock   *core.Genesis
}

LightClientConfig combines all configuration required for creating and configuring a LightClient.

type WithdrawEvent 

type WithdrawEvent struct {
	// contains filtered or unexported fields
}

WithdrawEvent holds relevant information about a withdraw event

func (WithdrawEvent) Amount 

func (w WithdrawEvent) Amount() *big.Int

Amount withdrawn

func (WithdrawEvent) BlockHash 

func (w WithdrawEvent) BlockHash() common.Hash

BlockHash of the containing block

func (WithdrawEvent) BlockHeight 

func (w WithdrawEvent) BlockHeight() uint64

BlockHeight of the containing block

func (WithdrawEvent) Receiver 

func (w WithdrawEvent) Receiver() common.Address

Receiver of the withdraw

func (WithdrawEvent) TxHash 

func (w WithdrawEvent) TxHash() common.Hash

TxHash hash of the transaction

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