60 lines
1010 B
Plaintext
60 lines
1010 B
Plaintext
use aiken/dict.{Dict}
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pub type PolicyId =
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ByteArray
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pub type AssetName =
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ByteArray
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pub type Value =
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Dict<PolicyId, Dict<AssetName, Int>>
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pub fn from_asset(
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policy_id: PolicyId,
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asset_name: AssetName,
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quantity: Int,
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) -> Value {
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let asset =
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dict.new()
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|> dict.insert(asset_name, quantity)
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dict.new()
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|> dict.insert(policy_id, asset)
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}
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pub fn from_lovelace(quantity: Int) -> Value {
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from_asset(#[], #[], quantity)
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}
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pub fn add(left v0: Value, right v1: Value) -> Value {
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dict.union_with(
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v0,
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v1,
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fn(_, a0, a1) {
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let asset =
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dict.union_with(
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a0,
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a1,
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fn(_, q0, q1) {
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let q = q0 + q1
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if q == 0 {
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None
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} else {
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Some(q)
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}
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},
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)
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when dict.toList(asset) is {
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[] -> None
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_ -> Some(asset)
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}
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},
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)
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}
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test add_1() {
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let v1 = from_lovelace(1)
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let v2 = from_lovelace(-1)
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add(v1, v2) == dict.new()
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}
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