inventory

Documentation

Overview

Package inventory contains the inventory manager. the inventory manager is one of the core pieces of the program which manages the currently available inventory.

"All" (committed & uncommitted inventory) is considered to be the current balance on all chains (so, you if you iterate through all erc-20's and call balanceOf()) that is the "All" inventory "Commitable" inventory is "All" inventory net of current commitments. Commitments occur when a user bridge request comes in and the relayer internally commits to filling it. This prevents overcommiting erc-20 balances.

Index

• Variables
• type BalanceFetchArgOption
  • func ShouldRefreshBalances() BalanceFetchArgOption
  • func SkipDBCache() BalanceFetchArgOption
• type Manager
  • func NewInventoryManager(ctx context.Context, clientFetcher submitter.ClientFetcher, ...) (Manager, error)
• type QuoterOption
  • func WithTTL(ttl time.Duration) QuoterOption
• type RebalanceData
• type RebalanceManager
• type TokenMetadata

Variables

var ErrUnsupportedChain = errors.New("could not get gas balance for unsupported chain")

ErrUnsupportedChain is the error for an unsupported chain.

Types

type BalanceFetchArgOption

type BalanceFetchArgOption func(options *balanceFetchOptions)

BalanceFetchArgOption is an option that can be passed into a balance fetch request. we do this to allow optional args.

func ShouldRefreshBalances

func ShouldRefreshBalances() BalanceFetchArgOption

ShouldRefreshBalances allows someone fetching balance(s) to skip the cache.

func SkipDBCache

func SkipDBCache() BalanceFetchArgOption

SkipDBCache allows someone fetching balance(s) to skip the cache.

type Manager

type Manager interface {
	// Start starts the inventory manager.
	Start(ctx context.Context) (err error)
	// GetCommittableBalance gets the total balance available for quotes
	// this does not include on-chain balances committed in previous quotes that may be
	// refunded in the event of a revert.
	GetCommittableBalance(ctx context.Context, chainID int, token common.Address, options ...BalanceFetchArgOption) (*big.Int, error)
	// GetCommittableBalances gets the total balances committable for all tracked tokens.
	GetCommittableBalances(ctx context.Context, options ...BalanceFetchArgOption) (map[int]map[common.Address]*big.Int, error)
	// ApproveAllTokens approves all tokens for the relayer address.
	ApproveAllTokens(ctx context.Context) error
	// HasSufficientGas checks if there is sufficient gas for a given route.
	HasSufficientGas(ctx context.Context, chainID int, gasValue *big.Int) (bool, error)
	// Rebalance checks whether a given token should be rebalanced, and
	// executes the rebalance if necessary.
	Rebalance(ctx context.Context, chainID int, token common.Address) error
	// GetTokenMetadata gets the metadata for a token.
	GetTokenMetadata(chainID int, token common.Address) (*TokenMetadata, error)
}

Manager is the interface for the inventory manager.

func NewInventoryManager

func NewInventoryManager(ctx context.Context, clientFetcher submitter.ClientFetcher, handler metrics.Handler, cfg relconfig.Config, relayer common.Address, txSubmitter submitter.TransactionSubmitter, db reldb.Service) (Manager, error)

NewInventoryManager creates a new inventory manager. TODO: too many args here.

type QuoterOption

type QuoterOption func(*inFlightManager)

QuoterOption defines a type for functional options.

func WithTTL

func WithTTL(ttl time.Duration) QuoterOption

WithTTL sets the TTL for the inFlightManager.

type RebalanceData

type RebalanceData struct {
	OriginMetadata *TokenMetadata
	DestMetadata   *TokenMetadata
	Amount         *big.Int
	Method         relconfig.RebalanceMethod
}

RebalanceData contains metadata for a rebalance action.

type RebalanceManager

type RebalanceManager interface {
	// Start starts the rebalance manager.
	Start(ctx context.Context) (err error)
	// Execute executes a rebalance action.
	Execute(ctx context.Context, rebalance *RebalanceData) error
}

RebalanceManager is the interface for the rebalance manager.

type TokenMetadata

type TokenMetadata struct {
	Name       string
	Balance    *big.Int
	Decimals   uint8
	Allowances map[spendableContract]*big.Int
	IsGasToken bool
	ChainID    int
	Addr       common.Address
}

TokenMetadata contains metadata for a token.