fuel-core 0.48.0

Fuel client library is aggregation of all fuels service. It contains the all business logic of the fuel protocol.
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use crate::{
    fuel_core_graphql_api::database::ReadView,
    graphql_api::{
        api_service::ReadDatabase,
        require_historical_execution,
    },
    schema::{
        contract::ContractBalance,
        scalars::{
            AssetId,
            Bytes32,
            ContractId,
            HexString,
            U32,
        },
    },
};
use async_graphql::{
    Context,
    Object,
    Subscription,
};
use fuel_core_services::stream::Stream;
use fuel_core_types::fuel_types;
use futures::{
    StreamExt,
    TryStreamExt,
};

#[derive(Default)]
pub struct StorageQuery;

#[Object]
impl StorageQuery {
    /// Get storage slot values for a contract at a specific block height.
    /// Use the latest block height if not provided.
    /// Requires historical execution config to be enabled.
    async fn contract_slot_values(
        &self,
        ctx: &Context<'_>,
        contract_id: ContractId,
        block_height: Option<U32>,
        storage_slots: Vec<Bytes32>,
    ) -> async_graphql::Result<Vec<StorageSlot>> {
        require_historical_execution(ctx)?;

        let view_block_height = if let Some(block_height) = block_height {
            block_height.0.into()
        } else {
            let read_view: &ReadView = ctx.data_unchecked();
            read_view.latest_height()?
        };

        let read_database: &ReadDatabase = ctx.data_unchecked();
        let view_at = read_database.view_at(view_block_height)?;
        let storage_slots = storage_slots
            .into_iter()
            .map(|x| x.into())
            .collect::<Vec<_>>();

        let stream = view_at
            .contract_slot_values(contract_id.into(), storage_slots)
            .map(|result| result.map(|(key, value)| StorageSlot { key, value }))
            .try_collect()
            .await?;

        Ok(stream)
    }

    /// Get balance values for a contract at a specific block height.
    /// Use the latest block height if not provided.
    /// Requires historical execution config to be enabled.
    async fn contract_balance_values(
        &self,
        ctx: &Context<'_>,
        contract_id: ContractId,
        block_height: Option<U32>,
        assets: Vec<AssetId>,
    ) -> async_graphql::Result<Vec<ContractBalance>> {
        require_historical_execution(ctx)?;

        let view_block_height = if let Some(block_height) = block_height {
            block_height.0.into()
        } else {
            let read_view: &ReadView = ctx.data_unchecked();
            read_view.latest_height()?
        };

        let read_database: &ReadDatabase = ctx.data_unchecked();
        let view_at = read_database.view_at(view_block_height)?;
        let assets = assets.into_iter().map(|x| x.into()).collect::<Vec<_>>();

        let stream = view_at
            .contract_balance_values(contract_id.into(), assets)
            .map(|result| result.map(Into::into))
            .try_collect()
            .await?;

        Ok(stream)
    }
}

#[derive(Default)]
pub struct StorageSubscription;

#[Subscription]
impl StorageSubscription {
    async fn contract_storage_slots<'a>(
        &self,
        ctx: &Context<'a>,
        contract_id: ContractId,
    ) -> async_graphql::Result<
        impl Stream<Item = async_graphql::Result<StorageSlot>> + 'a + use<'a>,
    > {
        require_historical_execution(ctx)?;
        let read_view: &ReadView = ctx.data_unchecked();

        let stream = read_view
            .contract_storage_slots(contract_id.into())
            .map(|result| {
                result
                    .map(|(key, value)| StorageSlot { key, value })
                    .map_err(|e| anyhow::anyhow!(e).into())
            });

        Ok(stream)
    }

    async fn contract_storage_balances<'a>(
        &self,
        ctx: &Context<'a>,
        contract_id: ContractId,
    ) -> async_graphql::Result<
        impl Stream<Item = async_graphql::Result<ContractBalance>> + 'a + use<'a>,
    > {
        require_historical_execution(ctx)?;
        let read_view: &ReadView = ctx.data_unchecked();

        let stream =
            read_view
                .contract_storage_balances(contract_id.into())
                .map(|result| {
                    result
                        .map(Into::into)
                        .map_err(|e| anyhow::anyhow!(e).into())
                });

        Ok(stream)
    }
}

pub struct StorageSlot {
    key: fuel_types::Bytes32,
    value: Vec<u8>,
}

#[Object]
impl StorageSlot {
    async fn key(&self) -> Bytes32 {
        self.key.into()
    }

    async fn value(&self) -> HexString {
        HexString(self.value.clone())
    }
}