From bc668c56902f1acc37fff98da3f7785f19bb3f95 Mon Sep 17 00:00:00 2001
From: Salvionied <edo.salvioni@gmail.com>
Date: Thu, 26 Oct 2023 10:35:39 +0200
Subject: [PATCH] Add: Evaluate Endpoint

---
 client/transactions.go | 19 +++++++++++++++++++
 models/transactions.go | 18 ++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/client/transactions.go b/client/transactions.go
index 3a605e4..52a5b40 100644
--- a/client/transactions.go
+++ b/client/transactions.go
@@ -110,3 +110,22 @@ func (c *Client) TransactionOutputsFromReferences(references []models.TxoReferen
 	return &transactionOutputsFromReferences, nil
 
 }
+
+func (c *Client) EvaluateTx(txCbor string, AdditionalUtxos ...string) ([]models.RedeemerEvaluation, error) {
+	url := "/transactions/evaluate"
+	body := models.EvaluateTx{
+		Cbor:            txCbor,
+		AdditionalUtxos: AdditionalUtxos,
+	}
+	resp, err := c.post(url, body)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	var redeemerEvals []models.RedeemerEvaluation
+	err = json.NewDecoder(resp.Body).Decode(&redeemerEvals)
+	if err != nil {
+		return nil, err
+	}
+	return redeemerEvals, nil
+}
diff --git a/models/transactions.go b/models/transactions.go
index 5bde671..35226ab 100644
--- a/models/transactions.go
+++ b/models/transactions.go
@@ -65,3 +65,21 @@ type TransactionOutputsFromReferences struct {
 	LastUpdated utils.LastUpdated `json:"last_updated"`
 	NextCursor  string            `json:"next_cursor"`
 }
+
+type EvaluateTx struct {
+	Cbor            string   `json:"cbor"`
+	AdditionalUtxos []string `json:"additional_utxos"`
+}
+
+type ExecutionUnits struct {
+	Mem   int64 `json:"Mem"`
+	Steps int64 `json:"Steps"`
+}
+
+type RedeemerEvaluation struct {
+	ExUnits       ExecutionUnits `json:"ex_units"`
+	RedeemerIndex int            `json:"redeemer_index"`
+	RedeemerTag   string         `json:"redeemer_tag"`
+}
+
+type EvaluateTxResponse []RedeemerEvaluation