一：前言
由于业务需求，需要本地先计算出filecoin广播交易成功后的cid，也是踩了好多坑，最终搞定
二：代码
以下只提供js代码：
const filecoin_signing = require('@zondax/filecoin-signing-tools')
const cbor = require("ipld-dag-cbor")
const CID = require('cids')
const multihashing = require('multihashing-async')
const privateKey = ''
const message = {
"to": "f1str7eiaxglndkh5rm7qe4cprlwguwmkoj4xyu5i",
"from": "f1re27enhjrpp7jnr33iioq6am6w6xodu63aodlha",
"gasfeecap": "2589446624",
"gaslimit": 608335,
"gaspremium": "99562",
"method": 0,
"nonce": 52,
"value": "10000000000000",
"version": 0,
"params": ""
}
async function cid() {
let messageBytes = filecoin_signing.transactionSerializeRaw(message)
let tranSignBytes = filecoin_signing.transactionSignRaw(message, privateKey)
let cidBytes = Buffer.concat([
Buffer.from([130]),
messageBytes,
cbor.util.serialize(Buffer.concat([
//签名type为1
Buffer.from([1]),
tranSignBytes,
])),
])
const hash = await multihashing(cidBytes, 'blake2b-256')
const cid = new CID(1, 'dag-cbor', hash)
console.log("cid:" + cid.toString())
}
cid()
三：参考代码
https://github.com/filecoin-project/lotus/blob/master/chain/types/cbor_gen.go
