Postgres: QueryFailedError: type "http_response" does not exist. Unable to call HTTP function as a custom user - sql

Question

I was trying out supabase + nestjs REST API. But for some weird reasons, HTTP trigger is not working.
We wanted to call our API end point whenever INSERT | UPDATE | DELETE operations happen in the table.
We looked into supabase webhook, but since it is still in alpha, we could not use it.
So we thought of using Postgres HTTP extension
Here's the step which i have followed.
create user api_gateway with password 'dummypassword';
GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA public TO api_gateway;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO api_gateway;
GRANT USAGE ON SCHEMA public TO api_gateway;
GRANT all ON SCHEMA net TO api_gateway;
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO api_gateway;
grant usage ON schema extensions TO api_gateway;
Then i created a table in public schema as follows
create table test(
id uuid PRIMARY KEY not null DEFAULT uuid_generate_v4(),
created_at timestamp with time zone default current_timestamp not null,
name varchar(50)
);
Then i created trigger in following format
CREATE OR REPLACE FUNCTION public.test_post()
returns trigger as $$
declare hres http_response;
declare trigger_payload jsonb;
begin
trigger_payload = jsonb_build_object(
'old_record', OLD,
'record', NEW,
'type', TG_OP,
'table', TG_TABLE_NAME,
'schema', TG_TABLE_SCHEMA
);
select * into hres from http(
(
'POST',
'my rest endpoing',
ARRAY[
http_header('Authorization', concat('Bearer ', 'my token')),
http_header('Content-Type', 'application/json')
],
trigger_payload,
trigger_payload
)::http_request
);
return new;
end;
$$ language plpgsql security definer;
DROP TRIGGER IF EXISTS ON_CREATE_test on "public"."test";
CREATE TRIGGER ON_CREATE_test
AFTER INSERT ON public.test
FOR EACH ROW EXECUTE PROCEDURE public.test_post();
Then i ran the following query
GRANT ALL ON FUNCTION public.publish_to_pubsub() TO api_gateway;
Now, when i manually insert a row into the Test table from supabase dashboard, the trigger executes and the REST api request is made.
But when i connect to supabase from nestjs (using type orm module, api_gateway as user) and make a post request to insert a row into test table, i get following error.
QueryFailedError: type "http_response" does not exist
Detailed log
{
length: 721,
severity: 'ERROR',
code: '42704',
detail: undefined,
hint: undefined,
position: undefined,
internalPosition: '16',
internalQuery: '\n' +
'\n' +
'declare hres http_response;\n' +
'declare trigger_payload jsonb;\n' +
'\n' +
'begin\n' +
' trigger_payload = jsonb_build_object(\n' +
" 'old_record', OLD,\n" +
" 'record', NEW,\n" +
" 'type', TG_OP,\n" +
" 'table', TG_TABLE_NAME,\n" +
" 'schema', TG_TABLE_SCHEMA\n" +
' );\n' +
'\n' +
' select * into hres from http(\n' +
' (\n' +
" 'POST',\n" +
" 'https://api***********************************',\n" +
' ARRAY[\n' +
" http_header('Authorization', concat('Bearer ', '')),\n" +
" http_header('Content-Type', 'application/json')\n" +
' ],\n' +
' trigger_payload,\n' +
' trigger_payload\n' +
' )::http_request\n' +
' );\n' +
'\n' +
' return new;\n' +
'end;\n',
where: 'compilation of PL/pgSQL function "test_post" near line 3',
schema: undefined,
table: undefined,
column: undefined,
dataType: undefined,
constraint: undefined,
file: 'parse_type.c',
line: '270',
routine: 'typenameType'
}
Not really sure what the issue is. I am happy to provide any additional information.