ICS29 Fee Middleware Support

.changelog/unreleased/features/ibc-relayer-cli/2714-fee-transfer-command.md

@@ -0,0 +1,2 @@
+- New command `fee transfer` which transfers tokens with fees
+  ([#2714](https://github.com/informalsystems/ibc-rs/issues/2714))

.github/workflows/integration.yaml

@@ -169,6 +169,49 @@ jobs:
             test -p ibc-integration-test --features ica --no-fail-fast -- \
             --nocapture --test-threads=1 test_ica_filter
 
+  ics29-fee-test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        chain:
+          - package: ibc-go-v5-simapp
+            command: simd
+            account_prefix: cosmos
+          - package: ibc-go-v6-simapp
+            command: simd
+            account_prefix: cosmos
+    steps:
+      - uses: actions/checkout@v2
+      - uses: cachix/install-nix-action@v15
+        with:
+          install_url: https://nixos-nix-install-tests.cachix.org/serve/vij683ly7sl95nnhb67bdjjfabclr85m/install
+          install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v10
+        with:
+          name: cosmos
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - uses: Swatinem/rust-cache@v1
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: -p ibc-integration-test --features ics29-fee --no-fail-fast --no-run
+      - env:
+          RUST_LOG: info
+          RUST_BACKTRACE: 1
+          NO_COLOR_LOG: 1
+          CHAIN_COMMAND_PATH: ${{ matrix.chain.command }}
+          ACCOUNT_PREFIX: ${{ matrix.chain.account_prefix }}
+        run: |
+          nix shell .#${{ matrix.chain.package }} -c cargo \
+            test -p ibc-integration-test --features ics29-fee --no-fail-fast -- \
+            --nocapture --test-threads=1 fee::
+
   model-based-test:
     runs-on: ubuntu-latest
     timeout-minutes: 60