ExecuteScriptAtBlockHeight Access API Method

Parameters

Script

string

REQUIRED

The Base64 encoded content of the Cadence script

Arguments

string

REQUIRED

A list of arguments each encoded as Base64 passed in the JSON-Cadence interchange format

BlockHeight

string

REQUIRED

The block height for which the script is to be run. The string final and sealed are also supported

Returns

value

string

The result of the executed Cadence script

Request

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"strconv"
)

func main() {

	// Requires authenticating before making the request. Refer to Intro Page on how Authentication can be done.
	client, err := getAccessClientWithBasicAuth("ENDPOINT-NAME", "TOKEN_GOES_HERE")
	ctx := context.Background()
	if err != nil {
		log.Fatalf("err: %v", err)
	}
	
	// Execute script at latest block
	script := []byte(`
		pub fun main(a: Int): Int {
			return a + 10
		}
	`)

	// Convert integer to JSON-CDC (Cadence JSON)
	arg := 10
	// JSON-CDC representation of an integer is a JSON object with "type" and "value" fields
	jsonCDC := fmt.Sprintf(`{"type":"Int","value":"%s"}`, strconv.Itoa(arg))

	// Create script arguments
	args := [][]byte{[]byte(jsonCDC)}

	// Execute script at Block Height
	valueHeightResp, err := client.ExecuteScriptAtBlockHeight(ctx, &access.ExecuteScriptAtBlockHeightRequest{Script: script, Arguments: args, BlockHeight: 54774078})
	respJSON, err := json.Marshal(valueHeightResp)
	if err != nil {
		log.Fatal("execute script at block height failed: ", err)
	}
	fmt.Println("ExecuteScriptAtBlockHeight response:", string(respJSON))
}

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