How to make integrations in AWS Api Gateway v2 (http) with lambda alias and stage variables in terraform - aws-lambda

Question

I have several lambdas with aliases (develop, production, staging..) and when I try to make an integration with his route like this
resource "aws_apigatewayv2_route" "http_routes" {
for_each = local.lambda_integrations
api_id = aws_apigatewayv2_api.api_http.id
route_key = each.key
target = "integrations/${aws_apigatewayv2_integration.http_integrations[each.key].id}"
}
resource "aws_apigatewayv2_integration" "http_integrations" {
for_each = local.lambda_integrations
api_id = aws_apigatewayv2_api.api_http.id
integration_type = "AWS_PROXY"
integration_method = "POST"
integration_uri = "arn:aws:apigateway:${var.auth.region}:lambda:path/2015-03-31/functions/${module.lambdas_functions[index(module.lambdas_functions.*.function_name,each.value.lambda)].arn}:$${stageVariables.alias}/invocations"
}
and
# Main Permission
resource "aws_lambda_permission" "permission_lambda" {
for_each = local.lambda_integrations
statement_id = can(each.value.statement) ? each.value.statement : "AllowExecutionFromAPIGateway"
action = "lambda:InvokeFunction"
function_name = module.lambdas_functions[
index(module.lambdas_functions.*.function_name,each.value.lambda)
].function_name
principal = "apigateway.amazonaws.com"
source_arn = "${aws_apigatewayv2_api.api_http.execution_arn}/*/*"
}
# Stage develop permission
resource "aws_lambda_permission" "permission_lambda_alias_develop" {
for_each = local.lambda_integrations
statement_id = can(each.value.statement) ? each.value.statement : "AllowExecutionFromAPIGateway"
action = "lambda:InvokeFunction"
function_name = module.lambdas_functions[
index(module.lambdas_functions.*.function_name,each.value.lambda)
].function_name
principal = "apigateway.amazonaws.com"
source_arn = "${aws_apigatewayv2_api.api_http.execution_arn}/*/*"
qualifier = "develop"
}
this works with a [number] version in CloudWatch, but in the lambda trigger I get this:
and although the code works, it does not seem to me to be correct.
what could be the best and correct approach to this situation?.
Regards

Answer 1

What worked for me is this:
Destroyed the API Gateway components (used target)
terraform destroy --var-file VAR_FILES --target API_AND_LAMBDA_MODULES
Renamed the stage to "$default"
Made the value of the perm_source_arn parameter as
"arn:aws:execute-api:${REGION}:${ACCOUNT_ID}:${API_ID}/*/*${ROUTE_KEY_PATH}"
After these, just re-apply.