From d8718c3f05801593c3f506cb20cb8aaf6e22ffbb Mon Sep 17 00:00:00 2001
From: David Sterling <128665635+DavidPSterling@users.noreply.github.com>
Date: Sun, 23 Apr 2023 09:25:19 +0700
Subject: [PATCH] Update bdk-jvm README build instructions

The current build instructions for bdk-jvm are insufficient for someone to build bdk-jvm from scratch. It's not outlined that JDK 11 and Rust is required on the system.
---
 bdk-jvm/README.md | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/bdk-jvm/README.md b/bdk-jvm/README.md
index a9a7e36..855d9f0 100644
--- a/bdk-jvm/README.md
+++ b/bdk-jvm/README.md
@@ -49,17 +49,25 @@ dependencies {
 
 ## How to build
 _Note that Kotlin version `1.6.10` or later is required to build the library._
-
-1. Clone this repository.
+1. Install JDK 11. It must be JDK 11 (not 17), otherwise it won't build. For example, with SDKMAN!:
+```shell
+curl -s "https://get.sdkman.io" | bash
+source "$HOME/.sdkman/bin/sdkman-init.sh"
+sdk install java 11.0.19-tem
+```
+2. Install rust:
+```shell
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+```
+3. Clone this repository.
 ```shell
 git clone https://github.com/bitcoindevkit/bdk-ffi
 ```
-2. Follow the "General" bdk-ffi ["Getting Started (Developer)"] instructions.
-3. If building on macOS install required intel and m1 jvm targets
+4. If building on macOS install required intel and m1 jvm targets
 ```sh
 rustup target add x86_64-apple-darwin aarch64-apple-darwin
 ```
-4. Build kotlin bindings
+5. Build kotlin bindings
  ```sh
  # build JVM library
  ./gradlew buildJvmLib