token

type Token struct {
	Address  common.Address
	Symbol   string
	Decimals uint8
}

type TokensDB interface {
	AddToken(token *Token) error
	GetToken(addr common.Address) (*Token, error)
	Close()
}

type TokensManager interface {
	// Returns token for the given contract address or error.
	// For unknown tokens this fetches token details from the contract.
	// NOT THREAD SAFE
	GetToken(ctx context.Context, contractAddress common.Address) (*Token, error)
	// Returns token's balance for the given address or error.
	FetchBalance(ctx context.Context, token *Token, addr common.Address) (*big.Int, error)
}