add precompile gen script

.gitignore

@@ -50,3 +50,5 @@ profile.cov
 logs/
 
 tests/spec-tests/
+
+precompile/out/

precompile/README.md

@@ -0,0 +1,9 @@
+# Writing a Precompile Contract
+
+1. Create Solidity interface in `contracts/interfaces`, e.g, IExampleContract.sol
+
+2. Generate bindings with `./gen.sh`
+
+3. Implement the precompile in Go. The struct should implement the `StatefulPrecompiledContract` interface and methods defined in the Solidity interface.
+
+See NativeMinter as an example implementation

precompile/foundry.toml

@@ -0,0 +1,10 @@
+[profile.default]
+fuzz_runs = 1024
+evm_version = 'shanghai'
+solc_version = '0.8.24'
+cache = false
+force = false
+optimizer = false
+
+[profile.ci]
+fuzz_runs = 8192

precompile/gen.sh

@@ -0,0 +1,13 @@
+forge build --extra-output-files bin --extra-output-files abi --root .
+
+for dir in ./out/*/
+do
+    NAME=$(basename $dir)
+    NAME=${NAME%.sol}
+    NAME_LOWER=$(echo "${NAME:1}" | tr '[:upper:]' '[:lower:]')
+    abigen --pkg bindings \
+      --abi ./out/$NAME.sol/$NAME.abi.json \
+      --bin ./out/$NAME.sol/$NAME.bin \
+      --out ./bindings/i_${NAME_LOWER}.abigen.go \
+      --type ${NAME:1}
+done