Implement the ETH connector. (#59)

.github/workflows/tests.yml

@@ -22,8 +22,7 @@ jobs:
           profile: minimal
           toolchain: nightly-2021-03-25
           override: true
-      - run: make release
-      - run: ls -lH release.wasm
+      - run: make test-build
       - name: Run cargo test
         uses: actions-rs/cargo@v1
         with:

Cargo.toml

@@ -54,6 +54,7 @@ wee_alloc = { version = "0.4.5", default-features = false }
 lunarity-lexer = { git = "https://github.com/ilblackdragon/lunarity", rev = "5201d9a76f7e491082b7f74af7e64049271e387f", default-features = false }
 ethabi = { git = "https://github.com/darwinia-network/ethabi", branch = "xavier-no-std", default-features = false }
 hex = { version = "0.4", default-features = false, features = ["alloc"] }
+byte-slice-cast = { version = "1.0", default-features = false }
 rjson = { version = "0.3.1", default-features = false }
 
 [dev-dependencies]
@@ -77,3 +78,6 @@ testnet = []
 engine = []
 contract = ["engine"]
 evm_bully = []
+log = []
+exit-precompiles = ["contract"]
+integration-test = ["log"]

Makefile

@@ -1,6 +1,6 @@
 CARGO = cargo
 NEAR  = near
-FEATURES = contract
+FEATURES = contract,log
 
 ifeq ($(evm-bully),yes)
   FEATURES := $(FEATURES),evm_bully
@@ -15,6 +15,7 @@ release.wasm: target/wasm32-unknown-unknown/release/aurora_engine.wasm
 
 target/wasm32-unknown-unknown/release/aurora_engine.wasm: Cargo.toml Cargo.lock $(wildcard src/*.rs)
 	RUSTFLAGS='-C link-arg=-s' $(CARGO) build --target wasm32-unknown-unknown --release --no-default-features --features=$(FEATURES) -Z avoid-dev-deps
+	ls -l target/wasm32-unknown-unknown/release/aurora_engine.wasm 
 
 debug: debug.wasm
 
@@ -24,6 +25,11 @@ debug.wasm: target/wasm32-unknown-unknown/debug/aurora_engine.wasm
 target/wasm32-unknown-unknown/debug/aurora_engine.wasm: Cargo.toml Cargo.lock $(wildcard src/*.rs)
 	$(CARGO) build --target wasm32-unknown-unknown --no-default-features --features=$(FEATURES) -Z avoid-dev-deps
 
+test-build:
+	RUSTFLAGS='-C link-arg=-s' $(CARGO) build --target wasm32-unknown-unknown --release --no-default-features --features=contract,integration-test -Z avoid-dev-deps
+	ln -sf target/wasm32-unknown-unknown/release/aurora_engine.wasm release.wasm 
+	ls -l target/wasm32-unknown-unknown/release/aurora_engine.wasm 
+
 .PHONY: all release debug
 
 deploy: release.wasm
@@ -35,10 +41,10 @@ check-format:
 	$(CARGO) fmt -- --check
 
 check-clippy:
-	$(CARGO) +nightly clippy --no-default-features --features=$(FEATURES) -- -D warnings
+	$(CARGO) clippy --no-default-features --features=$(FEATURES) -- -D warnings
 
 # test depends on release since `tests/test_upgrade.rs` includes `release.wasm`
-test: release
+test: test-build
 	$(CARGO) test
 
 format:

doc/eth-connector.md

@@ -0,0 +1,42 @@
+# ETH connector
+
+## Build
+1. For production set in the Makefile
+    ```   
+       FEATURES = contract
+    ```
+    1.1. For **development and testing** set in the Makefile
+    ```
+       FEATURES = contract,integration-test
+    ```
+2. Build release: `$ make release`
+3. Run tests: `$ cargo test` 
+4. Deploying process is common for Aurora itself. Please reference [README.md](../README.md)
+
+## Initialize eth-conenctor
+With `near-cli` run:
+```
+$ near call <NEAR_ACC> new_eth_connector '{"prover_account": "<PROVER_NEAR_ACCOUNT>", "eth_custodian_address": "<ETH_ADDRESS>"}' --account-id <NEAR_ACC>
+
+```
+
+## ETH connector specific methods
+* new_eth_connector (call once)
+* deposit (mutable)  
+* withdraw (mutable, payable)
+* finish_deposit_near (private, mutable)
+* ft_total_supply (view)
+* ft_total_supply_near (view)
+* ft_total_supply_eth (view)
+* ft_balance_of (view)
+* ft_balance_of_eth (view)
+* ft_transfer (mutable, payable)
+* ft_resolve_transfer (private, mutable)
+* ft_transfer_call (mutable, payable)
+* ft_on_transfer (private, mutable)
+* storage_deposit (mutable)
+* storage_withdraw (mutable, payable)
+* storage_balance_of (view)
+
+## Ethereum specific flow
+Follow by [this instruction](https://github.com/aurora-is-near/eth-connector/blob/master/README.md).

src/admin_controlled.rs

@@ -0,0 +1,28 @@
+use crate::sdk;
+
+pub type PausedMask = u8;
+
+pub trait AdminControlled {
+    /// Returns true if the current account is owner
+    fn is_owner(&self) -> bool {
+        sdk::current_account_id() == sdk::predecessor_account_id()
+    }
+
+    /// Return the current mask representing all paused events.
+    fn get_paused(&self) -> PausedMask;
+
+    /// Update mask with all paused events.
+    /// Implementor is responsible for guaranteeing that this function can only be
+    /// called by owner of the contract.
+    fn set_paused(&mut self, paused: PausedMask);
+
+    /// Return if the contract is paused for the current flag and user
+    fn is_paused(&self, flag: PausedMask) -> bool {
+        (self.get_paused() & flag) != 0 && !self.is_owner()
+    }
+
+    /// Asserts the passed paused flag is not set. Panics with "ERR_PAUSED" if the flag is set.
+    fn assert_not_paused(&self, flag: PausedMask) {
+        assert!(!self.is_paused(flag), "ERR_PAUSED");
+    }
+}