What is it

modules are the entry points.

• system/module is the main entry point.

fx provide:

• create instance using the lib’s client (one client).
• instead of instantiating the client every time the workflow runs.

package gateways

import (
	"go.uber.org/fx"
)

var GatewayModule = fx.Provide(
	NewSomeGateWay
)

After you inject the gateway, you call the gateway.method directly.