Update TypeScript to use ! instead of casting

ts_src/transaction.ts

@@ -294,8 +294,8 @@ export class Transaction {
     if (inIndex >= this.ins.length) return ONE
 
     // ignore OP_CODESEPARATOR
-    const ourScript = bscript.compile((<Array<Buffer | number>>bscript.decompile(prevOutScript)).filter((x) => {
-      return x !== <number>opcodes.OP_CODESEPARATOR
+    const ourScript = bscript.compile(bscript.decompile(prevOutScript)!.filter((x) => {
+      return x !== opcodes.OP_CODESEPARATOR
     }))
 
     const txTmp = this.clone()
@@ -471,28 +471,28 @@ export class Transaction {
   }
 
   private __toBuffer (buffer?: Buffer, initialOffset?: number, __allowWitness?: boolean): Buffer {
-    if (!buffer) buffer = <Buffer> Buffer.allocUnsafe(this.__byteLength((<boolean>__allowWitness)))
+    if (!buffer) buffer = <Buffer> Buffer.allocUnsafe(this.__byteLength(__allowWitness!))
 
     let offset = initialOffset || 0
 
     function writeSlice (slice: Buffer): void {
-      offset += slice.copy(<Buffer>buffer, offset)
+      offset += slice.copy(buffer!, offset)
     }
 
     function writeUInt8 (i: number) {
-      offset = (<Buffer>buffer).writeUInt8(i, offset)
+      offset = (buffer!).writeUInt8(i, offset)
     }
 
     function writeUInt32 (i: number) {
-      offset = (<Buffer>buffer).writeUInt32LE(i, offset)
+      offset = (buffer!).writeUInt32LE(i, offset)
     }
 
     function writeInt32 (i: number) {
-      offset = (<Buffer>buffer).writeInt32LE(i, offset)
+      offset = (buffer!).writeInt32LE(i, offset)
     }
 
     function writeUInt64 (i: number) {
-      offset = bufferutils.writeUInt64LE(<Buffer>buffer, i, offset)
+      offset = bufferutils.writeUInt64LE(buffer!, i, offset)
     }
 
     function writeVarInt (i: number) {
@@ -548,7 +548,7 @@ export class Transaction {
     writeUInt32(this.locktime)
 
     // avoid slicing unless necessary
-    if (initialOffset !== undefined) return buffer.slice((<number>initialOffset), offset)
+    if (initialOffset !== undefined) return buffer.slice(initialOffset, offset)
     return buffer
   }