Sign cmdline script (#1259)

* Create sign.ts

* lint

---------

Co-authored-by: Chris <[email protected]>

dev/scripts/src/scripts/sign.ts

@@ -0,0 +1,58 @@
+// Copyright 2021-2024 Prosopo (UK) Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+import { KeypairType } from '@polkadot/util-crypto/types'
+import { getPairAsync } from '@prosopo/contract'
+import { hideBin } from 'yargs/helpers'
+import { stringToU8a, u8aToHex } from '@polkadot/util'
+import yargs from 'yargs'
+
+const main = async () => {
+    console.log('argv', process.argv)
+    const argv = await yargs(hideBin(process.argv))
+        .option('mnemonic', {
+            alias: 'seed',
+            type: 'string',
+        })
+        .option('message', {
+            alias: 'msg',
+            type: 'string',
+        })
+        .option('type', {
+            type: 'string',
+            choices: ['sr25519', 'ed25519', 'ecdsa', 'ethereum'],
+            default: 'sr25519',
+        })
+        .option('ss58Format', {
+            type: 'number',
+            default: 42,
+        })
+        .parse()
+    const mnemonic = argv.mnemonic
+    if (!mnemonic) {
+        throw new Error('mnemonic is required')
+    }
+    const message = argv.message
+    if (!message) {
+        throw new Error('message is required')
+    }
+    const type = argv.type as KeypairType
+    const ss58Format = argv.ss58Format
+
+    const keypair = await getPairAsync(undefined, mnemonic, undefined, type, ss58Format)
+
+    const sig = keypair.sign(stringToU8a(message))
+    console.log(`hex sig: ${u8aToHex(sig)}`)
+}
+
+main()