fetcher

Documentation

Overview

Package fetcher provides fetchers to fetch data from Scribe, BridgeConfig, and Swap.

Index

• Constants
• func GetDefiLlamaData(ctx context.Context, timestamp int, coinGeckoID string) *float64
• type PriceService
• type ScribeFetcher
  • func NewFetcher(fetchClient *client.Client) ScribeFetcher
• type Service
  • func NewBridgeConfigFetcher(bridgeConfigAddress common.Address, ...) (Service, error)
• type SwapService
  • func NewSwapFetcher(swapAddress common.Address, backend bind.ContractBackend, isMetaSwap bool) (SwapService, error)

Constants

const NoTokenID = "NO_TOKEN_ID"

NoTokenID is the string returned when a token id is not found (not an authentic token).

Functions

func GetDefiLlamaData

func GetDefiLlamaData(ctx context.Context, timestamp int, coinGeckoID string) *float64

GetDefiLlamaData does a get request to defi llama for the symbol and price for a token.

Types

type PriceService

type PriceService interface {
	// GetDefiLlamaData historical price data
	GetDefiLlamaData(context.Context, int, string) *float64
}

PriceService --output=mocks --case=underscore.

type ScribeFetcher

type ScribeFetcher interface {
	// FetchTxSender fetches the sender of a transaction.
	FetchTxSender(ctx context.Context, chainID uint32, txHash string) (string, error)
	// FetchLastIndexed fetches the last indexed block per contract.
	FetchLastIndexed(ctx context.Context, chainID uint32, contractAddress string) (uint64, error)
	// FetchLogsInRange fetches logs in a range with the GQL client.
	FetchLogsInRange(ctx context.Context, chainID uint32, startBlock, endBlock uint64, contractAddress common.Address) ([]ethTypes.Log, error)
	// FetchBlockTime fetches the timestamp of a block.
	FetchBlockTime(ctx context.Context, chainID int, blockNumber int) (*int, error)
	// FetchTx fetches the transaction.
	FetchTx(ctx context.Context, tx string, chainID int, blockNumber int) (*uint64, *string, error)
}

ScribeFetcher is the interface for fetching events. It uses GQL.

func NewFetcher

func NewFetcher(fetchClient *client.Client) ScribeFetcher

NewFetcher creates a new fetcher.

type Service

type Service interface {
	// GetTokenID gets the token id from the bridge config contract.
	GetTokenID(ctx context.Context, chainID *big.Int, tokenAddress common.Address) (tokenID *string, err error)
	// GetToken gets the token from the bridge config contract.
	GetToken(ctx context.Context, chainID uint32, tokenAddress common.Address) (token *bridgeconfig.BridgeConfigV3Token, err error)
}

Service is the interface for the fetcher service.

func NewBridgeConfigFetcher

func NewBridgeConfigFetcher(bridgeConfigAddress common.Address, bridgeConfigRef *bridgeconfig.BridgeConfigRef) (Service, error)

NewBridgeConfigFetcher creates a new config fetcher. Backend must be an archive backend.

type SwapService

type SwapService interface {
	// GetTokenMetaData gets the token from the erc20 token contract given a swap contract token id.
	GetTokenMetaData(ctx context.Context, tokenAddress common.Address) (*string, *uint8, error)
	// GetTokenAddress gets the token address from the swap contract given a swap contract token id.
	GetTokenAddress(ctx context.Context, tokenIndex uint8) (*common.Address, error)
}

SwapService --output=mocks --case=underscore.

func NewSwapFetcher

func NewSwapFetcher(swapAddress common.Address, backend bind.ContractBackend, isMetaSwap bool) (SwapService, error)

NewSwapFetcher creates a new swap fetcher. Backend must be an archive backend.