chore: revert deletion of the old bbup (#9146)

This fixes noir CI as it relies on the old bbup and the new one does not
work for us.

barretenberg/cpp/installation/bbup

@@ -0,0 +1,117 @@
+#!/usr/bin/env bash
+set -e
+
+BB_HOME=${BB_HOME-"$HOME/.bb"}
+
+main() {
+  need_cmd curl
+
+  while [[ $1 ]]; do
+    case $1 in
+      --)               shift; break;;
+
+      -v|--version)     shift; BBUP_VERSION=$1;;
+      -h|--help)
+        usage
+        exit 0
+        ;;
+      *)
+        err "internal error: unknown option "$1"\n";;
+    esac; shift
+  done
+
+  if [ -z "$BBUP_VERSION" ]; then
+    err "--version option is required"
+  fi
+
+  BBUP_REPO=AztecProtocol/aztec-packages
+
+  PLATFORM="$(uname -s)"
+  case $PLATFORM in
+    Linux)
+      PLATFORM="linux-gnu"
+      ;;
+    Darwin)
+      PLATFORM="apple-darwin"
+      ;;
+    *)
+      err "unsupported platform: $PLATFORM"
+      ;;
+  esac
+
+  # Fetch system's architecture.
+  ARCHITECTURE="$(uname -m)"
+
+  # Align ARM naming for release fetching.
+  if [ "${ARCHITECTURE}" = "arm64" ]; then
+    ARCHITECTURE="aarch64" # Align release naming.
+  fi
+
+  # Reject unsupported architectures.
+  if [ "${ARCHITECTURE}" != "x86_64" ] && [ "${ARCHITECTURE}" != "aarch64" ]; then
+    err "unsupported architecure: $ARCHITECTURE-$PLATFORM"
+  fi
+
+  BBUP_TAG=$BBUP_VERSION
+  # Normalize versions (handle channels, versions without v prefix)
+  if [[ "$BBUP_VERSION" == [[:digit:]]* ]]; then
+    # Add v prefix
+    BBUP_VERSION="v${BBUP_VERSION}"
+    BBUP_TAG="aztec-packages-${BBUP_VERSION}"
+  fi
+
+  say "installing bb (version ${BBUP_VERSION} with tag ${BBUP_TAG})"
+
+  RELEASE_URL="https://github.com/${BBUP_REPO}/releases/download/${BBUP_TAG}"
+  BIN_TARBALL_URL="${RELEASE_URL}/barretenberg-${ARCHITECTURE}-${PLATFORM}.tar.gz"
+
+  # Download the binary's tarball and unpack it into the .bb directory.
+  say "downloading bb to '$BB_HOME'"
+  ensure curl -# -L $BIN_TARBALL_URL | tar -xzC $BB_HOME
+
+  say "done"
+}
+
+usage() {
+  cat 1>&2 <<EOF
+The installer for bb.
+Update or revert to a specific bb version with ease.
+USAGE:
+    bb <OPTIONS>
+OPTIONS:
+    -h, --help      Print help information
+    -v, --version   Install a specific version (required)
+EOF
+}
+
+say() {
+  printf 'bbup: %s\n' "$1"
+}
+
+warn() {
+  say "warning: ${1}" >&2
+}
+
+err() {
+  say "$1" >&2
+  exit 1
+}
+
+need_cmd() {
+  if ! check_cmd "$1"; then
+    err "need '$1' (command not found)"
+  fi
+}
+
+check_cmd() {
+  command -v "$1" >/dev/null 2>&1
+}
+
+# Run a command that should never fail. If the command fails execution
+# will immediately terminate with an error showing the failing
+# command.
+ensure() {
+  if ! "$@"; then err "command failed: $*"; fi
+}
+
+main "$@" || exit 1

barretenberg/cpp/installation/install

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -e
+
+echo Installing bbup...
+
+BB_HOME=${BB_HOME-"$HOME/.bb"}
+
+BBUP_BIN_URL=${BBUP_BIN_URL-"https://raw.githubusercontent.com/AztecProtocol/aztec-packages/master/barretenberg/cpp/installation/bbup"}
+BBUP_BIN_PATH="$BB_HOME/bbup"
+
+# Create the .bb directory and bbup binary if it doesn't exist.
+mkdir -p $BB_HOME
+curl -# -L $BBUP_BIN_URL -o $BBUP_BIN_PATH
+chmod +x $BBUP_BIN_PATH
+
+# Store the correct profile file (i.e. .profile for bash or .zshrc for ZSH).
+case $SHELL in
+*/zsh)
+  PROFILE=$HOME/.zshrc
+  PREF_SHELL=zsh
+  ;;
+*/bash)
+  PROFILE=$HOME/.bashrc
+  PREF_SHELL=bash
+  ;;
+*/fish)
+  PROFILE=$HOME/.config/fish/config.fish
+  PREF_SHELL=fish
+  ;;
+*/ash)
+  PROFILE=$HOME/.profile
+  PREF_SHELL=ash
+  ;;
+*)
+  echo "bbup: could not detect shell, manually add ${BB_HOME} to your PATH."
+  exit 1
+  ;;
+esac
+
+# Only add bbup if it isn't already in PATH.
+if [[ ":$PATH:" != *":${BB_HOME}:"* ]]; then
+  # Add the .bb directory to the path and ensure the old PATH variables remain.
+  echo >>$PROFILE && echo "export BB_HOME=\"$BB_HOME\"" >>$PROFILE
+  echo >>$PROFILE && echo "export PATH=\"\$PATH:\$BB_HOME\"" >>$PROFILE
+fi
+
+echo && echo "Detected your preferred shell is ${PREF_SHELL} and added bbup to PATH. Run 'source ${PROFILE}' or start a new terminal session to use bbup."
+echo "Then, simply run 'bbup' to install bb."

barretenberg/cpp/src/barretenberg/bb/readme.md

@@ -0,0 +1,140 @@
+# BB
+
+### Why is this needed?
+
+Barretenberg is a library that allows one to create and verify proofs. One way to specify the circuit that one will use to create and verify
+proofs over is to use the Barretenberg standard library. Another way, which pertains to this module is to supply the circuit description using an IR called [ACIR](https://github.com/noir-lang/acvm).
+
+This binary will take as input ACIR and witness values described in the IR to create proofs.
+
+### Installation
+
+1. Install `bbup` the installation script by running this in your terminal:
+
+    ```bash
+    curl -L https://raw.githubusercontent.com/AztecProtocol/aztec-packages/master/barretenberg/cpp/installation/install | bash
+    ```
+
+2. Reload your terminal shell environment:
+
+    macOS:
+    ```bash
+    source ~/.zshrc
+    ```
+
+    Linux:
+    ```bash
+    source ~/.bashrc
+    ```
+
+3. Install the version of `bb` compatible with your Noir version; with **Noir v0.34.0** for example:
+
+    ```bash
+    bbup -v 0.55.0
+    ```
+
+    Check the version compatibility section below for how to identify matching versions.
+
+4. Check if the installation was successful:
+
+    ```bash
+    bb --version
+    ```
+
+If installation was successful, the command would print the version of `bb` installed.
+
+### Usage prerequisites
+
+Certain `bb` commands will expect the tool `jq` to already be installed. If `jq -V` doesn't return a version number, install it from [here](https://jqlang.github.io/jq/download/).
+
+### Version compatibility with Noir
+
+TODO: https://github.com/AztecProtocol/aztec-packages/issues/7511
+
+For quick reference:
+- Noir v0.34.0 <> BB v0.55.0
+- Noir v0.33.0 <> BB v0.47.1
+- Noir v0.32.0 <> BB v0.46.1
+- Noir v0.31.0 <> BB v0.41.0
+
+### Usage
+
+TODO: https://github.com/AztecProtocol/aztec-packages/issues/7600
+
+All available `bb` commands:
+https://github.com/AztecProtocol/aztec-packages/blob/barretenberg-v0.55.0/barretenberg/cpp/src/barretenberg/bb/main.cpp#L1369-L1512
+
+#### FilePath vs Stdout
+
+For commands which allow you to send the output to a file using `-o {filePath}`, there is also the option to send the output to stdout by using `-o -`.
+
+#### Usage with UltraHonk
+
+Documented with Noir v0.33.0 <> BB v0.47.1:
+
+##### Proving and verifying
+
+1. Follow [the Noir docs](https://noir-lang.org/docs/getting_started/hello_noir/) to compile and generate witness of your Noir program
+
+2. Prove the valid execution of your Noir program running:
+
+    ```bash
+    bb prove_ultra_honk -b ./target/hello_world.json -w ./target/witness-name.gz -o ./target/proof
+    ```
+
+3. Compute the verification key for your Noir program running:
+
+    ```bash
+    bb write_vk_ultra_honk -b ./target/hello_world.json -o ./target/vk
+    ```
+
+4. Verify your proof running:
+
+    ```bash
+    bb verify_ultra_honk -k ./target/vk -p ./target/proof
+    ```
+
+    If successful, the verification will complete in silence; if unsuccessful, the command will trigger logging of the corresponding error.
+
+Refer to all available `bb` commands linked above for full list of functionality.
+
+##### Generating proofs for verifying in Solidity
+
+Barretenberg UltraHonk comes with the capability to verify proofs in Solidity, i.e. in smart contracts on EVM chains.
+
+1. Follow [the Noir docs](https://noir-lang.org/docs/getting_started/hello_noir/) to compile and generate witness of your Noir program
+
+2. Prove the valid execution of your Noir program running:
+
+    ```bash
+    bb prove_ultra_keccak_honk -b ./target/hello_world.json -w ./target/witness-name.gz -o ./target/proof
+    ```
+
+    > **Note:** `prove_ultra_keccak_honk` is used to generate UltraHonk proofs with Keccak hashes, as it is what the Solidity verifier is designed to be compatible with given the better gas efficiency when verifying on-chain; `prove_ultra_honk` in comparison generates proofs with Poseidon hashes, more efficient in recursions but not on-chain verifications.
+
+3. Compute the verification key for your Noir program running:
+
+    ```bash
+    bb write_vk_ultra_honk -b ./target/hello_world.json -o ./target/vk
+    ```
+
+4. Generate Solidity verifier
+ **WARNING:** Contract incomplete, do not use in production!
+
+    ```bash
+    bb contract_ultra_honk -k ./target/vk -c $CRS_PATH -b ./target/hello_world.json -o ./target/Verifier.sol
+    ```
+
+#### Usage with MegaHonk
+
+Use `bb <command>_mega_honk`.
+
+Refer to all available `bb` commands linked above for full list of functionality.
+
+Note that MegaHonk:
+- Generates insecure recursion circuits when Goblin recursive verifiers are not present
+- Will not have a Solidity verifier, as the proving system is intended for use with apps deploying on Aztec only
+
+### Maximum circuit size
+
+Currently the binary downloads an SRS that can be used to prove the maximum circuit size. This maximum circuit size parameter is a constant in the code and has been set to $2^{23}$ as of writing. This maximum circuit size differs from the maximum circuit size that one can prove in the browser, due to WASM limits.