45 lines
1.5 KiB
V
45 lines
1.5 KiB
V
module incatokens
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// AMMPool represents a simple Automated Market Maker pool.
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// It uses the constant product formula (x * y = k) to determine prices.
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pub struct AMMPool {
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pub mut:
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tokens f64 // The total number of tokens in the pool.
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usdc f64 // The total amount of USDC (stablecoin) in the pool.
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k f64 // The constant product (k = tokens * usdc).
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}
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// add_liquidity adds tokens and USDC to the pool, updating the constant product.
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// This function is used to provide liquidity to the AMM.
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pub fn (mut pool AMMPool) add_liquidity(tokens f64, usdc f64) {
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pool.tokens += tokens
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pool.usdc += usdc
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pool.k = pool.tokens * pool.usdc
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}
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// trade executes a swap by adding USDC to the pool and removing tokens.
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// The amount of tokens removed is calculated to maintain the constant product `k`.
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pub fn (mut pool AMMPool) trade(usdc_amount f64) ! {
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if pool.tokens <= 0 || pool.usdc <= 0 {
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return error('AMM pool is empty and cannot facilitate trades')
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}
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pool.usdc += usdc_amount
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if pool.usdc <= 0 {
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return error('USDC in the pool cannot be zero or negative after a trade')
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}
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// Re-calculate the number of tokens to maintain the constant product `k`.
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pool.tokens = pool.k / pool.usdc
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}
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// get_price calculates the current price of a single token in USDC.
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// The price is determined by the ratio of USDC to tokens in the pool.
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pub fn (pool AMMPool) get_price() f64 {
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if pool.tokens <= 0 {
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return 0 // Avoid division by zero if there are no tokens in the pool.
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}
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return pool.usdc / pool.tokens
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} |