Generating the asmap file for Bitcoin 0.20+ ASN-based bucketing of peers

bitcoin-asmap.md

Thanks to Gleb Naumenko (@naumenkogs) via https://blog.bitmex.com/call-to-action-testing-and-improving-asmap/

(fit the commands for your case, probably won't work for everybody)

1. Install Rust & compile deps for Bitcoin core

• https://www.rust-lang.org/tools/install
• https://github.com/bitcoin/bitcoin/tree/master/doc#building

2. Build bitcoin-asmap tool using sipa's branch off Bitcoin Core

mkdir ~/asmap-work
git clone https://github.com/sipa/bitcoin -b 202004_asmap_tool && cd bitcoin
./autogen.sh
./configure --disable-shared --without-gui --disable-wallet
make
sudo cp src/bitcoin-asmap /usr/bin/.

3. Build asmap-rs that downloads all raw needed data and generates the ASN bottleneck

cd ~/asmap-work
git clone https://github.com/rrybarczyk/asmap-rs && cd asmap-rs
cargo run --release download && mkdir bottleneck
cargo run --release find-bottleneck -d dump -o bottleneck

(WARNING: cargo run --release download will download several GBs of data)

4. Encode the ASN bottleneck to the final form using sipa's bitcoin-asmap tool

bitcoin-asmap encode ~/asmap-work/asmap.dat < bottleneck/bottleneck.*.txt

5. Add option to bitcoin.conf

asmap=/path/to/asmap-work/asmap.dat