docs: show how to use the SDK

README.md

@@ -4,27 +4,56 @@ golang sdk for aeternity blockchain
 [![Go Report Card](https://goreportcard.com/badge/github.com/aeternity/aepp-sdk-go)](https://goreportcard.com/report/github.com/aeternity/aepp-sdk-go) [![GoDoc](https://godoc.org/github.com/aeternity/aepp-sdk-go?status.svg)](https://godoc.org/github.com/aeternity/aepp-sdk-go)
 
 
+## Usage
+No matter what kind of transaction you're making, it always follows the same rules:
+1. Find the account nonce, get the transaction TTL (in blocks)
+2. Make the transaction
+3. Sign the transaction with a given network ID
+4. Broadcast it to a node of your choosing
+
+```
+acc, err := aeternity.AccountFromHexString(senderPrivateKey)
+if err != nil {
+    fmt.Println(err)
+    return
+}
+aeClient := aeternity.NewCli("http://localhost:3013", false).WithAccount(acc)
+```
+
+Most parameters are set by modifying the variables in `config.go` in this manner:
+`aeternity.Config.Client.Fee = *utils.RequireBigIntFromString("100000000000000")`
+
+When using the `Ae/Aens/Contract/Oracle` struct helper functions in `helpers.go`, chores like getting the TTL, Account Nonce, encoding of the AENS claim etc are done automatically.
+```
+preclaimTx, salt, err := aeClient.Aens.NamePreclaimTx("fdsa.test", aeternity.Config.Client.Fee)
+if err != nil {
+    fmt.Println(err)
+    return
+}
+preclaimTxStr, err := aeternity.BaseEncodeTx(&preclaimTx)
+
+signedTxStr, hash, signature, err := aeternity.SignEncodeTxStr(acc, preclaimTxStr, "ae_docker")
+if err != nil {
+    fmt.Println(err)
+    return
+}
+
+err = aeClient.BroadcastTransaction(signedTxStr)
+if err != nil {
+    panic(err)
+}
+```
+
 ## Development
 
-download the latest openapi spcecifications
+download the latest openapi specifications
 
 ```
 curl  https://sdk-edgenet.aepps.com/api -o api/swagger.json    
 ```
 
-replace every integer (int64) with a uint64 in the swagger.json (except for time)
 generate the client (using [go-swagger](https://github.com/go-swagger/go-swagger))
 
 ```
 rm -rf generated/* && swagger generate client -f api/swagger.json -A node  --with-flatten=minimal --target generated  --tags=external --api-package=operations --client-package=client
 ```
-
-## Structure
-No matter what kind of transaction you're making, it always follows the same rules:
-1. Find the account nonce, get the transaction TTL (in blocks)
-2. Make the transaction
-3. Sign the transaction with a given network ID
-4. Broadcast it to a node of your choosing
-
-The functions in `aeternity/helpers.go` will help you with these 4 steps, wrapping away the raw implementation details. They use the more barebones functions in `aeternity/transactions.go`.
-