Split library into different files to simplify maintenance

package.json

@@ -43,8 +43,8 @@
   },
   "scripts": {
     "build": "tsc && tsc -p tsconfig.esm.json",
-    "lint": "prettier --check index.ts",
-    "format": "prettier --write index.ts",
+    "lint": "prettier --check src",
+    "format": "prettier --write src",
     "test": "node test/index.test.js && node test/psbt-test/bip174-psbt-extended.test.js",
     "test:extended": "node --experimental-loader ./test/bitcoinjs-test/esm-loader.js ./test/bitcoinjs-test/index.test.js",
     "test:slow": "node test/index.test.js && node test/slow.test.js"

src/index.ts

@@ -0,0 +1,21 @@
+/*! scure-btc-signer - MIT License (c) 2022 Paul Miller (paulmillr.com) */
+
+// prettier-ignore
+export {
+  p2pk, p2pkh, p2sh, p2ms, p2wsh, p2wpkh, p2tr, p2tr_ns, p2tr_ms, p2tr_pk,
+  multisig // => classicMultisig?
+} from './payment.js';
+export { OP, RawTx, CompactSize, Script, ScriptNum } from './script.js';
+export { Transaction } from './transaction.js';
+export { selectUTXO } from './utxo.js';
+export { NETWORK, compareBytes as _cmpBytes, TAPROOT_UNSPENDABLE_KEY } from './utils.js';
+
+// Utils
+// prettier-ignore
+export {
+  Address, getAddress, WIF,
+  taprootListToTree, OutScript, _sortPubkeys, sortedMultisig, combinations
+} from './payment.js'; // remove
+export { _DebugPSBT, TaprootControlBlock } from './psbt.js'; // remove
+export { Decimal, bip32Path, SigHash, PSBTCombine, DEFAULT_SEQUENCE } from './transaction.js'; // remove
+export { _cmpBig, _Estimator } from './utxo.js';