token collections: create spec program

.github/workflows/pull-request-token-collection.yml

@@ -0,0 +1,66 @@
+name: Token Collection Pull Request
+
+on:
+  pull_request:
+    paths:
+    - 'token-collection/**'
+    - 'token/**'
+    - 'token-group/**'
+    - 'token-metadata/**'
+    - 'ci/*-version.sh'
+    - '.github/workflows/pull-request-token-collection.yml'
+  push:
+    branches: [master]
+    paths:
+    - 'token-collection/**'
+    - 'token/**'
+    - 'token-group/**'
+    - 'token-metadata/**'
+    - 'ci/*-version.sh'
+    - '.github/workflows/pull-request-token-collection.yml'
+
+jobs:
+  cargo-test-sbf:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set env vars
+        run: |
+          source ci/rust-version.sh
+          echo "RUST_STABLE=$rust_stable" >> $GITHUB_ENV
+          source ci/solana-version.sh
+          echo "SOLANA_VERSION=$solana_version" >> $GITHUB_ENV
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.RUST_STABLE }}
+          override: true
+          profile: minimal
+
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+          key: cargo-build-${{ hashFiles('**/Cargo.lock') }}-${{ env.RUST_STABLE}}
+
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/bin/rustfilt
+          key: cargo-sbf-bins-${{ runner.os }}
+
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/solana
+          key: solana-${{ env.SOLANA_VERSION }}
+
+      - name: Install dependencies
+        run: |
+          ./ci/install-build-deps.sh
+          ./ci/install-program-deps.sh
+          echo "$HOME/.local/share/solana/install/active_release/bin" >> $GITHUB_PATH
+
+      - name: Build and test
+        run: ./ci/cargo-test-sbf.sh token-collection

Cargo.toml

@@ -42,6 +42,7 @@ members = [
   "stake-pool/cli",
   "stake-pool/program",
   "stateless-asks/program",
+  "token-collection/program",
   "token-group/example",
   "token-group/interface",
   "token-lending/cli",

token-collection/README.md

@@ -0,0 +1,24 @@
+# SPL Token Collection
+
+This program serves as a reference implementation for using the SPL Token Group
+interface to create an on-chain program for managing token collections - such
+as NFT Collections.
+
+This program bears a lot of similarity to the example program found at
+`token-group/example`, but with some additional implementations centered around
+specifically token collections.
+
+## How Collections Work in this Program
+
+Strictly for demonstration purposes, this program is going to require the
+following:
+
+- Group tokens must be NFTs (0 decimals, 1 supply)
+- Group tokens must have metadata
+- Member tokens can be any SPL token, but must have metadata
+- Member tokens can be part of multiple collections
+
+## Demonstration
+
+For a particularly fleshed-out example of this program in action, check out the
+`token-collections.rs` test under `tests`!

token-collection/program/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "spl-token-collection"
+version = "0.1.0"
+description = "Solana Program Library Token Collection"
+authors = ["Solana Labs Maintainers <[email protected]>"]
+repository = "https://github.com/solana-labs/solana-program-library"
+license = "Apache-2.0"
+edition = "2021"
+
+[features]
+no-entrypoint = []
+test-sbf = []
+
+[dependencies]
+solana-program = "1.17.2"
+spl-pod = { version = "0.1.0", path = "../../libraries/pod" }
+spl-program-error = { version = "0.3.0" , path = "../../libraries/program-error" }
+spl-token-2022 = { version = "0.9.0", path = "../../token/program-2022", features = ["no-entrypoint"] }
+spl-token-group-interface = { version = "0.1.0", path = "../../token-group/interface" }
+spl-token-metadata-interface = { version = "0.2", path = "../../token-metadata/interface" }
+spl-type-length-value = { version = "0.3.0", path = "../../libraries/type-length-value" }
+
+[dev-dependencies]
+solana-program-test = "1.17.2"
+solana-sdk = "1.17.2"
+spl-discriminator = { version = "0.1.0", path = "../../libraries/discriminator" }
+spl-token-client = { version = "0.7", path = "../../token/client" }
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]

token-collection/program/src/entrypoint.rs

@@ -0,0 +1,23 @@
+//! Program entrypoint
+
+use {
+    crate::processor,
+    solana_program::{
+        account_info::AccountInfo, entrypoint, entrypoint::ProgramResult,
+        program_error::PrintProgramError, pubkey::Pubkey,
+    },
+    spl_token_group_interface::error::TokenGroupError,
+};
+
+entrypoint!(process_instruction);
+fn process_instruction(
+    program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    instruction_data: &[u8],
+) -> ProgramResult {
+    if let Err(error) = processor::process(program_id, accounts, instruction_data) {
+        error.print::<TokenGroupError>();
+        return Err(error);
+    }
+    Ok(())
+}

token-collection/program/src/lib.rs

@@ -0,0 +1,10 @@
+//! Crate defining the Token Collection program implementing the
+//! SPL Token Group interface.
+
+#![deny(missing_docs)]
+#![forbid(unsafe_code)]
+
+pub mod processor;
+
+#[cfg(not(feature = "no-entrypoint"))]
+mod entrypoint;