eth/backend.go
func (b *backendInstance) PTCIncreaseApproval(opts *bind.TransactOpts,
	spender common.Address, addedVal *big.Int) (*types.Transaction, error) {
	ctx2, cancel := b.addTimeout(opts.Context)
	defer cancel()

	opts.Context = ctx2

	tx, err := b.ptc.IncreaseApproval(opts, spender, addedVal)
	if err != nil {
		return nil, fmt.Errorf("failed to PTC increase approval: %s", err)
	}
	return tx, nil
}
func (b *backendInstance) PTCIncreaseApproval(opts *bind.TransactOpts,
	spender common.Address, addedVal *big.Int) (*types.Transaction, error) {
	ctx2, cancel := b.addTimeout(opts.Context)
	defer cancel()

	opts.Context = ctx2

	tx, err := b.ptc.IncreaseApproval(opts, spender, addedVal)
	if err != nil {
		return nil, fmt.Errorf("failed to PTC increase approval: %s", err)
	}
	return tx, nil
}
// PTCIncreaseApproval calls increaseApproval method of Privatix token contract.