Remove the Account duplication. (#4403)

## Motivation

We have the `Account` in two contexts:
* The `linera-sdk/src/abis/fungible.rs`
* The `linera-base/src/identifiers.rs`
which is not great. This PR unifies both types.

Fixes #2496 
Fixes #3462 

## Proposal

It is a given fact that in Linera, we will have a type `Account` that
contains both the `ChainId` and the `AccountOwner`. An additional
complication is that GraphQL forces to have one type in input and
another type in output.

The current design is to use the `fungible::Account` for the GraphQL
with the following (simplified) design:
```rust
#[derive(SimpleObject, InputObject)]
#[graphql(input_name = "FungibleAccount")]
struct Account { .... }
```

with this design the input type is `FungibleAccount` and the output type
is `Account`. This is inadequate since an account could have many usage
besides `FungibleAccount`. This is the error visible in issue #3462.
Instead the types should reflect the nature of the type; things like
`AccountInput`, `AccountOutput` and so on.

Generally, we assign a specific type to the input with something like
`TypeInput`. That is not great in our context. The type `Account` will
mostly be on input, and rarely on output. Therefore, we choose to use
`Account` on input and `AccountOutput` on output. This is done via the
following:
```rust
#[graphql(name = "AccountOutput", input_name = "Account")]
```

With this change, we can simplify the `FungibleAccount` into `Account`
for the input. The output type `AccountOutput` concerns only the refund
grant to entry for cross-chain messages.

## Test Plan

The CI addresses it.
However, the change from `FungibleAccount` to `Account` means that some
code in other crates may need to be updated as well.

## Release Plan

- Nothing to do / These changes follow the usual release cycle.

## Links

None.

Author: MathieuDutSik

Cargo.lock

@@ -6,7 +6,6 @@ edition = "2021"
 
 [dependencies]
 async-graphql.workspace = true
-fungible.workspace = true
 linera-sdk.workspace = true
 matching-engine.workspace = true
 num-bigint.workspace = true

examples/Cargo.lock

@@ -6,10 +6,9 @@
 mod state;
 
 use amm::{AmmAbi, Message, Operation, Parameters};
-use fungible::Account;
 use linera_sdk::{
     abis::fungible::{FungibleOperation, FungibleResponse, FungibleTokenAbi},
-    linera_base_types::{AccountOwner, Amount, ApplicationId, ChainId, WithContractAbi},
+    linera_base_types::{Account, AccountOwner, Amount, ApplicationId, ChainId, WithContractAbi},
     views::{RootView, View},
     Contract, ContractRuntime,
 };

examples/amm/Cargo.toml

@@ -1,9 +1,8 @@
 // Copyright (c) Zefchain Labs, Inc.
 // SPDX-License-Identifier: Apache-2.0
 
-use fungible::Account;
 use linera_sdk::{
-    linera_base_types::Amount,
+    linera_base_types::{Account, Amount},
     views::{linera_views, MapView, RegisterView, RootView, ViewStorageContext},
 };
 

examples/amm/src/contract.rs

@@ -6,10 +6,10 @@
 mod state;
 
 use crowd_funding::{CrowdFundingAbi, InstantiationArgument, Message, Operation};
-use fungible::{Account, FungibleTokenAbi};
+use fungible::FungibleTokenAbi;
 use linera_sdk::{
     abis::fungible::FungibleOperation,
-    linera_base_types::{AccountOwner, Amount, ApplicationId, WithContractAbi},
+    linera_base_types::{Account, AccountOwner, Amount, ApplicationId, WithContractAbi},
     views::{RootView, View},
     Contract, ContractRuntime,
 };

examples/amm/src/state.rs

@@ -6,11 +6,10 @@
 mod state;
 
 use fungible::{
-    Account, FungibleOperation, FungibleResponse, FungibleTokenAbi, InitialState, Message,
-    Parameters,
+    FungibleOperation, FungibleResponse, FungibleTokenAbi, InitialState, Message, Parameters,
 };
 use linera_sdk::{
-    linera_base_types::{AccountOwner, Amount, WithContractAbi},
+    linera_base_types::{Account, AccountOwner, Amount, WithContractAbi},
     views::{RootView, View},
     Contract, ContractRuntime,
 };

examples/crowd-funding/src/contract.rs

@@ -5,7 +5,7 @@
 
 use async_graphql::scalar;
 pub use linera_sdk::abis::fungible::*;
-use linera_sdk::linera_base_types::{AccountOwner, Amount};
+use linera_sdk::linera_base_types::{Account, AccountOwner, Amount};
 use serde::{Deserialize, Serialize};
 #[cfg(all(any(test, feature = "test"), not(target_arch = "wasm32")))]
 use {

examples/fungible/src/contract.rs

@@ -5,10 +5,10 @@
 
 #![cfg(not(target_arch = "wasm32"))]
 
-use fungible::{Account, FungibleTokenAbi, InitialState, InitialStateBuilder, Parameters};
+use fungible::{FungibleTokenAbi, InitialState, InitialStateBuilder, Parameters};
 use linera_sdk::{
     abis::fungible::FungibleOperation,
-    linera_base_types::{AccountOwner, Amount},
+    linera_base_types::{Account, AccountOwner, Amount},
     test::{MessageAction, TestValidator},
 };
 

examples/fungible/src/lib.rs

@@ -35,7 +35,7 @@ const MAKE_PAYMENT = gql`
   mutation Transfer(
     $owner: AccountOwner!
     $amount: Amount!
-    $targetAccount: FungibleAccount!
+    $targetAccount: Account!
   ) {
     transfer(owner: $owner, amount: $amount, targetAccount: $targetAccount)
   }