---
tags: Chia, Spend
---
# Chia Standard Transaction:

`The italicline is advance knowledge, leave it after you understand basic knowledge`

## :memo: todo list
1. Get spendable coins
2. Calculate change
3. Create coin for change and the given coin
4. Assemble condition
5. solutionForConditions
6. Bundle puzzleReveal, solution and coin as CoinSpend
7. sign every CoinSpend
8. Aggregate signedCoinSpends
9. Assemble SpendBundle
10. pushTransaction
### 1. Get spendable coins
**Get coin record from FullNode**

* What's FullNode?
* What does FullNode record?
* What Block?
* What does Block record?

2. Calculate change
**Spend total spend amount minus target amount.**
* How to get balance?

3. Create coin for change and the given coin
https://github.com/hashgreen/yuumi-wallet/blob/b7f783dee3c672e5a6e667421c30998243998150/src/utils/Wallet.ts#L308
4. Assemble condition
https://github.com/hashgreen/yuumi-wallet/blob/b7f783dee3c672e5a6e667421c30998243998150/src/utils/Wallet.ts#L324
5. solutionForConditions
https://github.com/hashgreen/yuumi-wallet/blob/b7f783dee3c672e5a6e667421c30998243998150/src/utils/Wallet.ts#L136
6. Bundle puzzleReveal, solution and coin as CoinSpend
https://github.com/hashgreen/yuumi-wallet/blob/b7f783dee3c672e5a6e667421c30998243998150/src/utils/Wallet.ts#L365
7. sign every CoinSpend
https://github.com/hashgreen/yuumi-wallet/blob/b7f783dee3c672e5a6e667421c30998243998150/src/store/WalletStore.ts#L156
8. Aggregate signedCoinSpends
https://github.com/hashgreen/yuumi-wallet/blob/b7f783dee3c672e5a6e667421c30998243998150/src/store/WalletStore.ts#L154

9. SpendBundle
https://docs.chia.net/docs/04coin-set-model/spend_bundles
The only acceptable format to FullNode

class CoinSpend:
    coin: Coin
    puzzle_reveal: SerializedProgram
    solution: SerializedProgram

class SpendBundle:
    coin_spends: List[CoinSpend]
    aggregated_signature: G2Element
    

10. pushTransaction
https://uat-testnet-jarvan.hash.green/api/docs/index.html#/Addon/post_v1_addon_push_tx