Dynamic min-relay-fee and dust amount (#280)

* [btc-embedded] add chainfee.Estimator and extraAPI interfaces

* dynamic fee amount

* dynamic dust amount

* [client] fix linter errors

* [domain] fix unit tests

* [server] return dust amount in GetInfo RPC

* [sdk] fix lnd dependencie

* go work sync

* fix witness stack size forfeit tx size estimator

* remove hardcoded fee values in covenant txbuilder

* lower liquid feerate

* fix after reviews

* go work sync

client/covenant/cli.go

@@ -18,8 +18,6 @@ import (
 	"github.com/vulpemventures/go-elements/psetv2"
 )
 
-const dust = 450
-
 type covenantLiquidCLI struct{}
 
 func (c *covenantLiquidCLI) SendAsync(ctx *cli.Context) error {
@@ -97,6 +95,11 @@ func sendOnchain(ctx *cli.Context, receivers []receiver) (string, error) {
 		return "", err
 	}
 
+	dust, err := utils.GetDust(ctx)
+	if err != nil {
+		return "", err
+	}
+
 	liquidNet := toElementsNetwork(net)
 
 	targetAmount := uint64(0)