Simplicity Unchained Web Proxy

This service provides an HTTP API to compile and convert Elements and Simplicity scripts. It is designed to be used alongside other Simplicity tools or as a standalone compiler service.

Interfaces

The service exposes interactions primarily through a RESTful HTTP API and is configured via a Command Line Interface (CLI).

API Usage

Compile Script

Compiles a source script into a base64 encoded program.

Endpoint: POST /simplicity-unchained-web-proxy-demo/compile

Request

curl -X POST http://localhost:3001/simplicity-unchained-web-proxy-demo/compile \
  -H "Content-Type: application/json" \
  -d '{
    "script": "fn sha2(string: u256) -> u256 { let hasher: Ctx8 = jet::sha_256_ctx_8_init(); let hasher: Ctx8 = jet::sha_256_ctx_8_add_32(hasher, string); jet::sha_256_ctx_8_finalize(hasher) } fn main() { let pk: Pubkey = witness::PK; let expected_pk_hash: u256 = 0x132f39a98c31baaddba6525f5d43f2954472097fa15265f45130bfdb70e51def; let pk_hash: u256 = sha2(pk); assert!(jet::eq_256(pk_hash, expected_pk_hash)); let msg: u256 = jet::sig_all_hash(); jet::bip_0340_verify((pk, msg), witness::SIG) }",
    "include_debug": false,
    "witness": {
        "PK": {
            "value": "0x79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
            "type": "Pubkey"
        },
        "SIG": {
            "value": "0xf74b3ca574647f8595624b129324afa2f38b598a9c1c7cfc5f08a9c036ec5acd3c0fbb9ed3dae5ca23a0a65a34b5d6cccdd6ba248985d6041f7b21262b17af6f",
            "type": "Signature"
        }
    }
  }'

Response

{
  "program_base64":"47dAoTaRMvOamMMbqt26ZSX11D8pVEcgl/oVJl9FEwv9tw5R3vBCBQgw5OrIECZIMPpFGq5AhAoNo1YggGAG0DgRAoNwc3CDhVm3QCMAhPAQgUH4iONxMKHFGxgIBpC3j8aggHCgOMgOOAA=",
  "witness_base64":"eb5mfvncu6xVoGKVzocLBwKb/NstzijZWfKBWxb4F5j3SzyldGR/hZViSxKTJK+i84tZipwcfPxfCKnANuxazTwPu57T2uXKI6CmWjS11szN1rokiYXWBB97ISYrF69v"
}   

---

Convert Bitcoin Script

Converts human-readable Bitcoin Script opcodes into a hex string.

Endpoint: POST /simplicity-unchained-web-proxy-demo/convert

Request

curl -X POST http://localhost:3001/simplicity-unchained-web-proxy-demo/convert \
   -H "Content-Type: application/json" \
   -d '{
     "script": "OP_PUSHNUM_2 OP_CAT OP_CHECKMULTISIG",
     "network": "liquid_testnet"
   }'

Response

{
  "hex":"527eae",
  "address":"tex1q6fqu642lyhu2g6ly0jzlsx36h5erh3f4y2hl9qv3eu6nspjhypjq5hlq4x"
}

---

Create PSET

Constructs an unsigned Partially Signed Elements Transaction (PSET). This endpoint automatically fetches the required Witness UTXO data for the inputs from the Blockstream API.

Endpoint: POST /simplicity-unchained-web-proxy-demo/create-pset

Request

curl -s -X POST "http://localhost:3001/simplicity-unchained-web-proxy-demo/create-pset" \
  -H "Content-Type: application/json" \
  -d '{
  "inputs": [
    "f539972050acd5c3020ff9d366af334e509160568b787121c5a6d58d3922a145:0"
  ],
  "outputs": [
    "tex1qg3uhk0r2knr2j6p85xqyd6nr2udpxe5t9jxusj5z54w67md0emnq229qdq:99000",
    "fee:1000"
  ],
  "asset_id": null,
  "network": "liquid_testnet"
}'
   

Response

{
  "asset":"144c654344aa716d6f3abcc1ca90e5641e4e2a7f633bc09fe3baf64585819a49",
  "inputs":1,
  "network":"liquid_testnet",
  "outputs":2,
  "pset":"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"}

---

Sign PSET

Signs a PSET input with a private key. This endpoint calculates the SegWit v0 sighash for the specified input, generates an ECDSA signature, and attaches it to the PSET.

Endpoint: POST /simplicity-unchained-web-proxy-demo/sign-pset

Request

curl -s -X POST "http://localhost:3001/simplicity-unchained-web-proxy-demo/sign-pset" \
  -H "Content-Type: application/json" \
  -d '{
  "pset_hex": "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",
  "secret_key_hex": "804622cda0d8e634317a12651d91751ceff5c081f2b5f63ef7912725c7275e5d",
  "input_index": 0,
  "redeem_script_hex": "5221033523982d58e94be3b735731593f8225043880d53727235b566c515d24a0f7baf21034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa52ae"
}'

Response

{
  "input_index":0,
  "partial_sigs_count":1,
  "pset":"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",
  "public_key_hex":"033523982d58e94be3b735731593f8225043880d53727235b566c515d24a0f7baf",
  "signature_hex":"3044022030535235414d40273b6346e3ec140112ad1abd8e8dfdda45830f548c453a213b02205696cf8dd689c0789e10a48642e48da6cc8671ee4788f8ea0623960bc720408001"}

---

Finalize PSET

Takes a fully signed PSET, validates the signatures, and constructs the final witness data (specifically for 2-of-2 multisig inputs). It extracts the raw, broadcast-ready transaction hex.

Endpoint: POST /simplicity-unchained-web-proxy-demo/finalize

Request

curl -s -X POST "http://localhost:3001/simplicity-unchained-web-proxy-demo/finalize" \
  -H "Content-Type: application/json" \
  -d '{
  "pset_hex": "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"
}'

Response

{
  "finalized":true,
  "inputs":1,
  "outputs":2,
  "transaction_hex":"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",
  "txid":"3d9e856b8d53fa3c0507d70f4007364667cbf5fdd11b55e13cae040480171d85",
  "witnesses":[
    {
      "input_index":0,
      "witness_elements":4
    }
  ]
}

---

Generate Keypair

Generates a random secp256k1 keypair (Secret Key and Compressed Public Key).

Endpoint: POST /simplicity-unchained-web-proxy-demo/generate

Request

curl -X POST http://localhost:3001/simplicity-unchained-web-proxy-demo/generate \
   -H "Content-Type: application/json" \
   -d '{}'

Response

{
  "compressed": true,
  "public_key": "03db8804e872ee79bb2b8b014f60530c448eaa108cb2582794a817e9d30aaf21ff",
  "secret_key": "777427aa93677f5e3e31edc8137884162593bb796e6eb84f99fb0c92dbb8e993"
}

---

Sign message

Signs a received message hex.

Endpoint: POST /simplicity-unchained-web-proxy-demo/sign_message

Request

curl -X POST http://localhost:3001/simplicity-unchained-web-proxy-demo/sign_message \
  -H "Content-Type: application/json" \
  -d '{
    "message": "68656C6C6F",
    "secret_key_hex": "0000000000000000000000000000000000000000000000000000000000000001"
  }'

Response

{
  "digest_hex":"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
  "public_key_hex":"0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
  "signature_hex":"06deab6fea971fa304c7a2d80e2fbc00db83d6f68261180264d613ada63a9c29046fb1f6e8728abf33d42e46027e49e615b8aad9704e8e4cf71d11237df8424b"
}

2. CLI (Command Line Interface)

The application is launched via the command line, allowing configuration of the server's listening address.

• Usage:

  cargo run -- [OPTIONS]