Fuel Indexer

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Below is a mapping of GraphQL schema types to their Sway and database equivalents.

Sway Type	GraphQL Schema Type	Postgres Type
b256	Address	varchar(64)
b256	ContractId	varchar(64)
bool	Boolean	bool
i64	Timestamp	timestamp
str[]	Blob	bytes
str[4]	Bytes4	varchar(16)
str[8]	Bytes8	varchar(64)
str[32]	Bytes32	varchar(64)
str[32]	AssetId	varchar(64)
str[32]	MessageId	varchar(64)
str[32]	Salt	varchar(64)
u32	UInt4	integer
u64	ID	bigint primary key
u64	UInt8	bigint
	Json	json
	Charfield	varchar(255)
	Blob	varchar(10485760)

Icon LinkExample

Let's define an Event struct in a Sway contract:

struct Event {
    id: u64,
    address: Address,
    block_height: u64,
}

The corresponding GraphQL schema to mirror this Event struct would resemble:

type Event @entity {
    id: ID!
    account: Address!
    block_height: UInt8!
}

And finally, this GraphQL schema will generate the following Postgres schema:

                                           Table "schema.event"
    Column   |     Type    | Collation | Nullable | Default | Storage  | Compression | Stats target | Description
--------------+-------------+-----------+----------+---------+----------+-------------+--------------+-------------
 id           |    bigint   |           | not null |         | plain    |             |              |
 block_height |    bigint   |           | not null |         | plain    |             |              |
 address      | varchar(64) |           | not null |         | plain    |             |              |
 object       |    bytea    |           | not null |         | extended |             |              |
Indexes:
    "event_pkey" PRIMARY KEY, btree (id)
Access method: heap

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