isValidOutput function
Implementation
isValidOutput(Uint8List data) {
return data.length == 25 &&
data[0] == OPS['OP_DUP'] &&
data[1] == OPS['OP_HASH160'] &&
data[2] == 0x14 &&
data[23] == OPS['OP_EQUALVERIFY'] &&
data[24] == OPS['OP_CHECKSIG'];
}